Merge branch 'master' into portexpander-keyboard

.devcontainer/Dockerfile

@@ -1,9 +1,10 @@
+# trunk-ignore-all(terrascan/AC_DOCKER_0002): Known terrascan issue
+# trunk-ignore-all(hadolint/DL3008): Do not pin apt package versions
+# trunk-ignore-all(hadolint/DL3013): Do not pin pip package versions
 FROM mcr.microsoft.com/devcontainers/cpp:1-debian-12
 
 USER root
 
-# trunk-ignore(terrascan/AC_DOCKER_0002): Known terrascan issue
-# trunk-ignore(hadolint/DL3008): Use latest version of packages
 RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
     && apt-get -y install --no-install-recommends \
     ca-certificates \
@@ -27,9 +28,11 @@ RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
     hwdata \
     gpg \
     gnupg2 \
+    libusb-1.0-0-dev \
+    libi2c-dev \
     && apt-get clean && rm -rf /var/lib/apt/lists/*
 
-RUN pipx install platformio==6.1.15
+RUN pipx install platformio
 
 COPY 99-platformio-udev.rules /etc/udev/rules.d/99-platformio-udev.rules
 

.github/ISSUE_TEMPLATE/Bug Report.yml

@@ -1,7 +1,7 @@
 name: Bug Report
 description: File a bug report
 title: "[Bug]: "
-labels: ["bug", "triage"]
+labels: [bug, triage]
 body:
   - type: markdown
     attributes:

.github/ISSUE_TEMPLATE/New Board.yml

@@ -1,7 +1,7 @@
 name: New Board
 description: Request us to support new hardware
 title: "[Board]: "
-labels: ["enhancement", "triage"]
+labels: [enhancement, triage]
 body:
   - type: markdown
     attributes:

.github/ISSUE_TEMPLATE/feature.yml

@@ -1,7 +1,7 @@
 name: Feature Request
 description: Request a new feature
 title: "[Feature Request]: "
-labels: ["enhancement"]
+labels: [enhancement]
 body:
   - type: markdown
     attributes:

.github/actionlint.yaml

@@ -0,0 +1,5 @@
+# Configuration related to self-hosted runner.
+self-hosted-runner:
+  # Labels of self-hosted runner in array of strings.
+  labels:
+    - test-runner

.github/actions/build-variant/action.yml

@@ -34,7 +34,7 @@ inputs:
   arch:
     description: Processor arch name
     required: true
-    default: "esp32"
+    default: esp32
 
 runs:
   using: composite

.github/actions/setup-base/action.yml

@@ -1,13 +1,13 @@
-name: "Setup Build Base Composite Action"
+name: Setup Build Base Composite Action
-description: "Base build actions for Meshtastic Platform IO steps"
+description: Base build actions for Meshtastic Platform IO steps
 
 runs:
-  using: "composite"
+  using: composite
   steps:
     - name: Checkout code
       uses: actions/checkout@v4
       with:
-        submodules: "recursive"
+        submodules: recursive
         ref: ${{github.event.pull_request.head.ref}}
         repository: ${{github.event.pull_request.head.repo.full_name}}
 

.github/dependabot.yml

@@ -1,26 +1,27 @@
+#trunk-ignore-all(yamllint/quoted-strings): required by dependabot syntax check
 version: 2
 updates:
   - package-ecosystem: docker
-    directory: devcontainer
+    directory: /.devcontainer
     schedule:
       interval: daily
-      time: "05:00" # trunk-ignore(yamllint/quoted-strings): required by dependabot syntax check
+      time: "05:00"
       timezone: US/Pacific
   - package-ecosystem: docker
     directory: /
     schedule:
       interval: daily
-      time: "05:00" # trunk-ignore(yamllint/quoted-strings): required by dependabot syntax check
+      time: "05:00"
       timezone: US/Pacific
   - package-ecosystem: gitsubmodule
     directory: /
     schedule:
       interval: daily
-      time: "05:00" # trunk-ignore(yamllint/quoted-strings): required by dependabot syntax check
+      time: "05:00"
       timezone: US/Pacific
   - package-ecosystem: github-actions
     directory: /.github/workflows
     schedule:
       interval: daily
-      time: "05:00" # trunk-ignore(yamllint/quoted-strings): required by dependabot syntax check
+      time: "05:00"
       timezone: US/Pacific

.github/workflows/build_nrf52.yml

@@ -7,6 +7,8 @@ on:
         required: true
         type: string
 
+permissions: read-all
+
 jobs:
   build-nrf52:
     runs-on: ubuntu-latest

.github/workflows/build_rpi2040.yml

@@ -7,6 +7,8 @@ on:
         required: true
         type: string
 
+permissions: read-all
+
 jobs:
   build-rpi2040:
     runs-on: ubuntu-latest

.github/workflows/build_stm32.yml

@@ -7,6 +7,8 @@ on:
         required: true
         type: string
 
+permissions: read-all
+
 jobs:
   build-stm32:
     runs-on: ubuntu-latest

.github/workflows/generate-userprefs.yml

@@ -1,35 +0,0 @@
-name: Generate UsersPrefs JSON manifest
-
-on:
-  push:
-    paths:
-      - userPrefs.h
-    branches:
-      - master
-
-jobs:
-  generate-userprefs:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v4
-
-      - name: Install Clang
-        run: sudo apt-get install -y clang
-
-      - name: Install trunk
-        run: curl https://get.trunk.io -fsSL | bash
-
-      - name: Generate userPrefs.jsom
-        run: python3 ./bin/build-userprefs-json.py
-
-      - name: Trunk format json
-        run: trunk format userPrefs.json
-
-      - name: Commit userPrefs.json
-        run: |
-          git config --global user.email "actions@github.com"
-          git config --global user.name "GitHub Actions"
-          git add userPrefs.json
-          git commit -m "Update userPrefs.json"
-          git push

.github/workflows/main_matrix.yml

@@ -135,10 +135,10 @@ jobs:
       build_location: local
     secrets: inherit
 
-  package-pio-deps-native:
+  package-pio-deps-native-tft:
     uses: ./.github/workflows/package_pio_deps.yml
     with:
-      pio_env: native
+      pio_env: native-tft
     secrets: inherit
 
   test-native:
@@ -288,7 +288,7 @@ jobs:
     needs:
       - gather-artifacts
       - build-debian-src
-      - package-pio-deps-native
+      - package-pio-deps-native-tft
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -324,10 +324,10 @@ jobs:
           merge-multiple: true
           path: ./output/debian-src
 
-      - name: Download native pio deps
+      - name: Download `native-tft` pio deps
         uses: actions/download-artifact@v4
         with:
-          pattern: platformio-deps-native-${{ steps.version.outputs.long }}
+          pattern: platformio-deps-native-tft-${{ steps.version.outputs.long }}
           merge-multiple: true
           path: ./output/pio-deps-native
 
@@ -352,6 +352,12 @@ jobs:
         run: >-
           bin/bump_version.py
 
+      - name: Ensure debian deps are installed
+        shell: bash
+        run: |
+          sudo apt-get update -y --fix-missing
+          sudo apt-get install -y devscripts
+
       - name: Update debian changelog
         run: >-
           debian/ci_changelog.sh

.github/workflows/nightly.yml

@@ -9,7 +9,7 @@ permissions: read-all
 jobs:
   trunk_check:
     name: Trunk Check and Upload
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
 
     steps:
       - name: Checkout
@@ -21,8 +21,9 @@ jobs:
           trunk-token: ${{ secrets.TRUNK_TOKEN }}
 
   trunk_upgrade:
+    # See: https://github.com/trunk-io/trunk-action/blob/v1/readme.md#automatic-upgrades
     name: Trunk Upgrade (PR)
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     permissions:
       contents: write # For trunk to create PRs
       pull-requests: write # For trunk to create PRs
@@ -30,6 +31,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      # See https://github.com/trunk-io/trunk-action/blob/v1/readme.md#automatic-upgrades
       - name: Trunk Upgrade
         uses: trunk-io/trunk-action/upgrade@v1
+        with:
+          base: master

.github/workflows/sec_sast_flawfinder.yml

@@ -1,41 +0,0 @@
----
-name: Flawfinder Scan
-
-on:
-  push:
-    branches: [master, develop]
-    paths-ignore:
-      - "**.md"
-      - "version.properties"
-
-jobs:
-  flawfinder:
-    runs-on: ubuntu-latest
-    name: Flawfinder
-
-    steps:
-      # step 1
-      - name: clone application source code
-        uses: actions/checkout@v4
-
-      # step 2
-      - name: flawfinder_scan
-        uses: david-a-wheeler/flawfinder@2.0.19
-        with:
-          arguments: "--sarif ./"
-          output: "flawfinder_report.sarif"
-
-      # step 3
-      - name: save report as pipeline artifact
-        uses: actions/upload-artifact@v4
-        with:
-          name: flawfinder_report.sarif
-          overwrite: true
-          path: flawfinder_report.sarif
-
-      # step 4
-      - name: publish code scanning alerts
-        uses: github/codeql-action/upload-sarif@v3
-        with:
-          sarif_file: flawfinder_report.sarif
-          category: flawfinder

.github/workflows/sec_sast_semgrep_cron.yml

@@ -3,10 +3,10 @@ name: Semgrep Full Scan
 
 on:
   workflow_dispatch:
-    branches:
-      - master
   schedule:
-    - cron: "0 1 * * 6"
+    - cron: 0 1 * * 6
+
+permissions: read-all
 
 jobs:
   semgrep-full:

.github/workflows/sec_sast_semgrep_pull.yml

@@ -2,6 +2,8 @@
 name: Semgrep Differential Scan
 on: pull_request
 
+permissions: read-all
+
 jobs:
   semgrep-diff:
     runs-on: ubuntu-22.04

.github/workflows/stale_bot.yml

@@ -16,7 +16,7 @@ jobs:
 
     steps:
       - name: Stale PR+Issues
-        uses: actions/stale@v9.0.0
+        uses: actions/stale@v9.1.0
         with:
           exempt-issue-labels: pinned,3.0
           exempt-pr-labels: pinned,3.0

.github/workflows/tests.yml

@@ -2,9 +2,11 @@ name: End to end tests
 
 on:
   schedule:
-    - cron: "0 0 * * *" # Run every day at midnight
+    - cron: 0 0 * * * # Run every day at midnight
   workflow_dispatch: {}
 
+permissions: read-all
+
 jobs:
   native-tests:
     uses: ./.github/workflows/test_native.yml

.github/workflows/trunk_annotate_pr.yml

@@ -11,7 +11,7 @@ permissions: read-all
 jobs:
   trunk_check:
     name: Trunk Code Quality Annotate
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     permissions:
       checks: write # For trunk to post annotations
       contents: read # For repo checkout

.github/workflows/trunk_check.yml

@@ -9,7 +9,7 @@ permissions: read-all
 jobs:
   trunk_check:
     name: Trunk Check Runner
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     permissions:
       checks: write # For trunk to post annotations
       contents: read # For repo checkout
@@ -20,3 +20,5 @@ jobs:
 
       - name: Trunk Check
         uses: trunk-io/trunk-action@v1
+        with:
+          save-annotations: true

.github/workflows/trunk_format_pr.yml

@@ -4,11 +4,15 @@ on:
   issue_comment:
     types: [created]
 
+permissions: read-all
+
 jobs:
   trunk-fmt:
     if: github.event.issue.pull_request != null && contains(github.event.comment.body, 'trunk fmt')
     runs-on: ubuntu-latest
-
+    permissions:
+      contents: write
+      pull-requests: write
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4

.github/workflows/update_protobufs.yml

@@ -1,10 +1,14 @@
 name: Update protobufs and regenerate classes
 on: workflow_dispatch
 
+permissions: read-all
+
 jobs:
   update-protobufs:
     runs-on: ubuntu-latest
-
+    permissions:
+      contents: write
+      pull-requests: write
     steps:
       - name: Checkout code
         uses: actions/checkout@v4

.gitmodules

@@ -1,6 +1,9 @@
 [submodule "protobufs"]
 	path = protobufs
 	url = https://github.com/meshtastic/protobufs.git
+[submodule "lib/device-ui"]
+	path = lib/device-ui
+	url = https://github.com/meshtastic/device-ui.git
 [submodule "meshtestic"]
 	path = meshtestic
 	url = https://github.com/meshtastic/meshTestic

.trunk/configs/.clang-tidy

@@ -0,0 +1,39 @@
+Checks: >-
+  bugprone-*,
+  cppcoreguidelines-*,
+  google-*,
+  misc-*,
+  modernize-*,
+  performance-*,
+  readability-*,
+  -bugprone-lambda-function-name,
+  -bugprone-reserved-identifier,
+  -cppcoreguidelines-avoid-goto,
+  -cppcoreguidelines-avoid-magic-numbers,
+  -cppcoreguidelines-avoid-non-const-global-variables,
+  -cppcoreguidelines-pro-bounds-array-to-pointer-decay,
+  -cppcoreguidelines-pro-type-vararg,
+  -google-readability-braces-around-statements,
+  -google-readability-function-size,
+  -misc-no-recursion,
+  -modernize-return-braced-init-list,
+  -modernize-use-nodiscard,
+  -modernize-use-trailing-return-type,
+  -performance-unnecessary-value-param,
+  -readability-magic-numbers,
+
+CheckOptions:
+  - key: readability-function-cognitive-complexity.Threshold
+    value: 100
+  - key: readability-function-cognitive-complexity.IgnoreMacros
+    value: true
+  # Set naming conventions for your style below (there are dozens of naming settings possible):
+  # See https://clang.llvm.org/extra/clang-tidy/checks/readability/identifier-naming.html
+  # - key: readability-identifier-naming.ClassCase
+  #   value: CamelCase
+  # - key: readability-identifier-naming.NamespaceCase
+  #   value: lower_case
+  # - key: readability-identifier-naming.PrivateMemberSuffix
+  #   value: _
+  # - key: readability-identifier-naming.StructCase
+  #   value: CamelCase

.trunk/configs/.markdownlint.yaml

@@ -8,3 +8,4 @@ line_length: false
 spaces: false
 url: false
 whitespace: false
+headings: false

.trunk/trunk.yaml

@@ -1,37 +1,36 @@
 version: 0.1
 cli:
-  version: 1.22.8
+  version: 1.22.10
 plugins:
   sources:
     - id: trunk
-      ref: v1.6.6
+      ref: v1.6.7
       uri: https://github.com/trunk-io/plugins
 lint:
   enabled:
-    - prettier@3.4.2
+    - prettier@3.5.2
-    - trufflehog@3.86.1
+    - trufflehog@3.88.14
     - yamllint@1.35.1
-    - bandit@1.8.0
+    - bandit@1.8.3
-    - checkov@3.2.334
+    - checkov@3.2.378
     - terrascan@1.19.9
-    - trivy@0.58.0
+    - trivy@0.59.1
-    #- trufflehog@3.63.2-rc0
     - taplo@0.9.3
-    - ruff@0.8.3
+    - ruff@0.9.7
-    - isort@5.13.2
+    - isort@6.0.1
-    - markdownlint@0.43.0
+    - markdownlint@0.44.0
-    - oxipng@9.1.3
+    - oxipng@9.1.4
     - svgo@3.3.2
-    - actionlint@1.7.4
+    - actionlint@1.7.7
-    - flake8@7.1.1
+    - flake8@7.1.2
     - hadolint@2.12.1-beta
     - shfmt@3.6.0
     - shellcheck@0.10.0
-    - black@24.10.0
+    - black@25.1.0
     - git-diff-check
-    - gitleaks@8.21.2
+    - gitleaks@8.24.0
     - clang-format@16.0.3
-    #- prettier@3.3.3
+    - clang-tidy@16.0.3
   ignore:
     - linters: [ALL]
       paths:

Dockerfile

@@ -1,21 +1,23 @@
 # trunk-ignore-all(terrascan/AC_DOCKER_0002): Known terrascan issue
-# trunk-ignore-all(hadolint/DL3008): Use latest version of apt packages for buildchain
 # trunk-ignore-all(trivy/DS002): We must run as root for this container
 # trunk-ignore-all(checkov/CKV_DOCKER_8): We must run as root for this container
 # trunk-ignore-all(hadolint/DL3002): We must run as root for this container
+# trunk-ignore-all(hadolint/DL3008): Do not pin apt package versions
+# trunk-ignore-all(hadolint/DL3013): Do not pin pip package versions
 
-FROM python:3.12-bookworm AS builder
+FROM python:3.13-bookworm AS builder
 ENV DEBIAN_FRONTEND=noninteractive
 ENV TZ=Etc/UTC
 
 # Install Dependencies
 ENV PIP_ROOT_USER_ACTION=ignore
-RUN apt-get update && apt-get install --no-install-recommends -y wget g++ zip git ca-certificates \
+RUN apt-get update && apt-get install --no-install-recommends -y \
+        wget g++ zip git ca-certificates \
         libgpiod-dev libyaml-cpp-dev libbluetooth-dev libi2c-dev \
-        libusb-1.0-0-dev libulfius-dev liborcania-dev libssl-dev pkg-config && \
+        libusb-1.0-0-dev libulfius-dev liborcania-dev libssl-dev pkg-config \
-    apt-get clean && rm -rf /var/lib/apt/lists/* && \
+    && apt-get clean && rm -rf /var/lib/apt/lists/* \
-    pip install --no-cache-dir -U platformio==6.1.16 && \
+    && pip install --no-cache-dir -U platformio \
-    mkdir /tmp/firmware
+    && mkdir /tmp/firmware
 
 # Copy source code
 WORKDIR /tmp/firmware
@@ -35,8 +37,9 @@ ENV TZ=Etc/UTC
 # nosemgrep: dockerfile.security.last-user-is-root.last-user-is-root
 USER root
 
-RUN apt-get update && apt-get --no-install-recommends -y install libc-bin libc6 libgpiod2 libyaml-cpp0.7 libi2c0 libulfius2.7 libusb-1.0-0-dev liborcania2.3 libssl3 && \
+RUN apt-get update && apt-get --no-install-recommends -y install \
-    apt-get clean && rm -rf /var/lib/apt/lists/* \
+        libc-bin libc6 libgpiod2 libyaml-cpp0.7 libi2c0 libulfius2.7 libusb-1.0-0-dev liborcania2.3 libssl3 \
+    && apt-get clean && rm -rf /var/lib/apt/lists/* \
     && mkdir -p /var/lib/meshtasticd \
     && mkdir -p /etc/meshtasticd/config.d \
     && mkdir -p /etc/meshtasticd/ssl

alpine.Dockerfile

@@ -1,14 +1,18 @@
 # trunk-ignore-all(trivy/DS002): We must run as root for this container
 # trunk-ignore-all(checkov/CKV_DOCKER_8): We must run as root for this container
 # trunk-ignore-all(hadolint/DL3002): We must run as root for this container
+# trunk-ignore-all(hadolint/DL3018): Do not pin apk package versions
+# trunk-ignore-all(hadolint/DL3013): Do not pin pip package versions
 
-FROM python:3.12-alpine3.21 AS builder
+FROM python:3.13-alpine3.21 AS builder
 
 ENV PIP_ROOT_USER_ACTION=ignore
-RUN apk add bash g++ libstdc++-dev linux-headers zip git ca-certificates libgpiod-dev yaml-cpp-dev bluez-dev \
+RUN apk --no-cache add \
-        libusb-dev i2c-tools-dev openssl-dev pkgconf argp-standalone && \
+        bash g++ libstdc++-dev linux-headers zip git ca-certificates libgpiod-dev yaml-cpp-dev bluez-dev \
-    pip install --no-cache-dir -U platformio==6.1.16 && \
+        libusb-dev i2c-tools-dev openssl-dev pkgconf argp-standalone \
-    mkdir /tmp/firmware
+    && rm -rf /var/cache/apk/* \
+    && pip install --no-cache-dir -U platformio \
+    && mkdir /tmp/firmware
 
 WORKDIR /tmp/firmware
 COPY . /tmp/firmware
@@ -27,7 +31,9 @@ FROM alpine:3.21
 # nosemgrep: dockerfile.security.last-user-is-root.last-user-is-root
 USER root
 
-RUN apk add libstdc++ libgpiod yaml-cpp libusb i2c-tools \
+RUN apk --no-cache add \
+        libstdc++ libgpiod yaml-cpp libusb i2c-tools \
+    && rm -rf /var/cache/apk/* \
     && mkdir -p /var/lib/meshtasticd \
     && mkdir -p /etc/meshtasticd/config.d \
     && mkdir -p /etc/meshtasticd/ssl

arch/esp32/esp32.ini

@@ -2,7 +2,7 @@
 [esp32_base]
 extends = arduino_base
 custom_esp32_kind = esp32
-platform = platformio/espressif32@6.9.0
+platform = platformio/espressif32@6.10.0
 
 build_src_filter = 
   ${arduino_base.build_src_filter} -<platform/nrf52/> -<platform/stm32wl> -<platform/rp2xx0> -<mesh/eth/> -<mesh/raspihttp>
@@ -37,6 +37,7 @@ build_flags =
   -DLIBPAX_ARDUINO
   -DLIBPAX_WIFI
   -DLIBPAX_BLE
+  -DHAS_UDP_MULTICAST=1
   ;-DDEBUG_HEAP
 
 lib_deps =
@@ -45,9 +46,9 @@ lib_deps =
   ${environmental_base.lib_deps}
   ${radiolib_base.lib_deps}
   https://github.com/meshtastic/esp32_https_server.git#23665b3adc080a311dcbb586ed5941b5f94d6ea2
-  h2zero/NimBLE-Arduino@^1.4.2
+  h2zero/NimBLE-Arduino@^1.4.3
   https://github.com/dbinfrago/libpax.git#3cdc0371c375676a97967547f4065607d4c53fd1
-  lewisxhe/XPowersLib@^0.2.6
+  lewisxhe/XPowersLib@^0.2.7
   https://github.com/meshtastic/ESP32_Codec2.git#633326c78ac251c059ab3a8c430fcdf25b41672f
   rweather/Crypto@^0.4.0
 
@@ -65,4 +66,4 @@ lib_ignore =
 
 ; customize the partition table
 ; http://docs.platformio.org/en/latest/platforms/espressif32.html#partition-tables
-board_build.partitions = partition-table.csv
+board_build.partitions = partition-table.csv

arch/esp32/esp32c6.ini

@@ -24,7 +24,7 @@ lib_deps =
   ${networking_base.lib_deps}
   ${environmental_base.lib_deps}
   ${radiolib_base.lib_deps}
-  lewisxhe/XPowersLib@^0.2.6
+  lewisxhe/XPowersLib@^0.2.7
   https://github.com/meshtastic/ESP32_Codec2.git#633326c78ac251c059ab3a8c430fcdf25b41672f
   rweather/Crypto@^0.4.0
 
@@ -38,4 +38,4 @@ lib_ignore =
   NonBlockingRTTTL
   NimBLE-Arduino
   libpax
-  
+  

arch/nrf52/nrf52.ini

@@ -4,8 +4,8 @@ platform = platformio/nordicnrf52@^10.7.0
 extends = arduino_base
 platform_packages =
   ; our custom Git version until they merge our PR
-  framework-arduinoadafruitnrf52 @ https://github.com/meshtastic/Adafruit_nRF52_Arduino.git#e13f5820002a4fb2a5e6754b42ace185277e5adf
+  platformio/framework-arduinoadafruitnrf52 @ https://github.com/meshtastic/Adafruit_nRF52_Arduino.git#e13f5820002a4fb2a5e6754b42ace185277e5adf
-  toolchain-gccarmnoneeabi@~1.90301.0
+  platformio/toolchain-gccarmnoneeabi@~1.90301.0
 
 build_type = debug
 build_flags =

arch/rp2xx0/rp2040.ini

@@ -18,6 +18,7 @@ build_src_filter =
 
 lib_ignore =
   BluetoothOTA
+  lvgl
 
 lib_deps =
   ${arduino_base.lib_deps}

arch/rp2xx0/rp2350.ini

@@ -1,8 +1,8 @@
 ; Common settings for rp2040 Processor based targets
 [rp2350_base]
-platform = https://github.com/maxgerhardt/platform-raspberrypi.git#19e30129fb1428b823be585c787dcb4ac0d9014c ; For arduino-pico >=4.2.1
+platform = https://github.com/maxgerhardt/platform-raspberrypi.git#76ecf3c7e9dd4503af0331154c4ca1cddc4b03e5 ; For arduino-pico >= 4.4.3
 extends = arduino_base
-platform_packages = framework-arduinopico@https://github.com/earlephilhower/arduino-pico.git#6024e9a7e82a72e38dd90f42029ba3748835eb2e ; 4.3.0 with fix MDNS
+platform_packages = framework-arduinopico@https://github.com/earlephilhower/arduino-pico.git#4.4.3
 
 board_build.core = earlephilhower
 board_build.filesystem_size = 0.5m
@@ -10,7 +10,6 @@ build_flags =
   ${arduino_base.build_flags} -Wno-unused-variable -Wcast-align
   -Isrc/platform/rp2xx0
   -D__PLAT_RP2350__
-#  -D _POSIX_THREADS
 build_src_filter = 
   ${arduino_base.build_src_filter} -<platform/esp32/> -<nimble/> -<modules/esp32> -<platform/nrf52/> -<platform/stm32wl> -<mesh/eth/> -<mesh/wifi/> -<mesh/http/> -<mesh/raspihttp> -<platform/rp2xx0/pico_sleep> -<platform/rp2xx0/hardware_rosc>
 

arch/stm32/stm32.ini

@@ -1,7 +1,7 @@
 [stm32_base]
 extends = arduino_base
-platform = ststm32
+platform = platformio/ststm32
-platform_packages = platformio/framework-arduinoststm32@https://github.com/stm32duino/Arduino_Core_STM32.git#ea74156acd823b6d14739f389e6cdc648f8ee36e
+platform_packages = platformio/framework-arduinoststm32@^4.20900.0
 
 build_type = release
 

bin/build-esp32.sh

@@ -35,11 +35,11 @@ cp $SRCBIN $OUTDIR/$basename-update.bin
 
 echo "Building Filesystem for ESP32 targets"
 pio run --environment $1 -t buildfs
-cp .pio/build/$1/littlefs.bin $OUTDIR/littlefswebui-$VERSION.bin
+cp .pio/build/$1/littlefs.bin $OUTDIR/littlefswebui-$1-$VERSION.bin
 # Remove webserver files from the filesystem and rebuild
 ls -l data/static # Diagnostic list of files
 rm -rf data/static
 pio run --environment $1 -t buildfs
-cp .pio/build/$1/littlefs.bin $OUTDIR/littlefs-$VERSION.bin
+cp .pio/build/$1/littlefs.bin $OUTDIR/littlefs-$1-$VERSION.bin
 cp bin/device-install.* $OUTDIR
-cp bin/device-update.* $OUTDIR
+cp bin/device-update.* $OUTDIR

bin/build-native.sh

@@ -24,7 +24,7 @@ mkdir -p $OUTDIR/
 rm -r $OUTDIR/* || true
 
 # Important to pull latest version of libs into all device flavors, otherwise some devices might be stale
-platformio pkg update --environment native || platformioFailed
+pio pkg update --environment native || platformioFailed
 pio run --environment native || platformioFailed
 cp .pio/build/native/program "$OUTDIR/meshtasticd_linux_$(uname -m)"
 cp bin/native-install.* $OUTDIR

bin/config.d/MUI/X11_480x480.yaml

@@ -0,0 +1,4 @@
+Display:
+  Panel: X11
+  Width: 480
+  Height: 480

bin/config.d/lora-starter-edition-sx1262-i2c.yaml

@@ -0,0 +1,10 @@
+# https://www.waveshare.com/core1262-868m.htm
+# https://github.com/markbirss/lora-starter-edition-sx1262-i2c
+Lora:
+  Module: sx1262  # Starter Edition SX1262 I2C Raspberry Pi HAT
+  DIO2_AS_RF_SWITCH: true
+  DIO3_TCXO_VOLTAGE: true
+  CS: 8
+  IRQ: 22
+  Busy: 4
+  Reset: 18

bin/config.d/lora-ws-raspberry-pi-pico-to-rpi-adapter.yaml

@@ -0,0 +1,10 @@
+# https://www.waveshare.com/pico-lora-sx1262-868m.htm
+# https://github.com/markbirss/lora-ws-raspberry-pi-pico-to-rpi-adapter
+Lora:
+  Module: sx1262  # Waveshare Raspberry Pi Pico to Raspberry Pi HAT Adapter
+  DIO2_AS_RF_SWITCH: true
+  DIO3_TCXO_VOLTAGE: true
+  CS: 21
+  IRQ: 16
+  Busy: 20
+  Reset: 18

bin/generate_ci_matrix.py

@@ -35,6 +35,11 @@ for subdir, dirs, files in os.walk(rootdir):
                                     outlist.append(section)
                             else:
                                 outlist.append(section)
+                        # Add the TFT variants if the base variant is selected
+                        elif section.replace("-tft", "") in outlist and config[config[c].name].get("board_level") != "extra":
+                            outlist.append(section)
+                        elif section.replace("-inkhud", "") in outlist and config[config[c].name].get("board_level") != "extra":
+                            outlist.append(section)
                     if "board_check" in config[config[c].name]:
                         if (config[config[c].name]["board_check"] == "true") & (
                             "check" in options
@@ -43,4 +48,4 @@ for subdir, dirs, files in os.walk(rootdir):
 if ("quick" in options) & (len(outlist) > 3):
     print(json.dumps(random.sample(outlist, 3)))
 else:
-    print(json.dumps(outlist))
+    print(json.dumps(outlist))

debian/control

@@ -3,6 +3,7 @@ Section: misc
 Priority: optional
 Maintainer: Austin Lane <vidplace7@gmail.com>
 Build-Depends: debhelper-compat (= 13),
+               lsb-release,
                tar,
                gzip,
                platformio,

debian/rules

@@ -11,6 +11,15 @@ PIO_ENV:=\
 	PLATFORMIO_LIBDEPS_DIR=pio/libdeps \
 	PLATFORMIO_PACKAGES_DIR=pio/packages
 
+# Raspbian armhf builds should be compatible with armv6-hardfloat
+# https://www.valvers.com/open-software/raspberry-pi/bare-metal-programming-in-c-part-1/#rpi1-compiler-flags
+ifneq (,$(findstring Raspbian,$(shell lsb_release -is)))
+ifeq ($(DEB_BUILD_ARCH),armhf)
+PIO_ENV+=\
+	PLATFORMIO_BUILD_FLAGS="-mfloat-abi=hard -mfpu=vfp -march=armv6zk"
+endif
+endif
+
 override_dh_auto_build:
 	# Extract tarballs within source deb
 	tar -xf pio.tar

lib/device-ui

@@ -0,0 +1 @@
+Subproject commit 5c6156d2aa10d62cca3e57ffc117b934ef2fbffe

monitor/filter_c3_exception_decoder.py

@@ -1,3 +1,6 @@
+# trunk-ignore-all(bandit/B404): subprocess is used to call addr2line
+# trunk-ignore-all(bandit/B603): subprocess is used to call addr2line
+
 # Copyright (c) 2014-present PlatformIO <contact@platformio.org>
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

platformio.ini

@@ -59,7 +59,7 @@ lib_deps =
 	https://github.com/meshtastic/arduino-fsm.git#7db3702bf0cfe97b783d6c72595e3f38e0b19159
 	https://github.com/meshtastic/TinyGPSPlus.git#71a82db35f3b973440044c476d4bcdc673b104f4
 	https://github.com/meshtastic/ArduinoThread.git#1ae8778c85d0a2a729f989e0b1e7d7c4dc84eef0
-	nanopb/Nanopb@0.4.9
+	nanopb/Nanopb@0.4.91
 	erriez/ErriezCRC32@1.0.1
   robtillaart/I2CKeyPad@0.5.0
 

protobufs

@@ -1 +1 @@
-Subproject commit 068646653e8375fc145988026ad242a3cf70f7ab
+Subproject commit 2a3a67f0431926dc3f32a8b216d264daab09b9bf

src/BluetoothStatus.h

@@ -0,0 +1,105 @@
+#pragma once
+#include "Status.h"
+#include "assert.h"
+#include "configuration.h"
+#include "meshUtils.h"
+#include <Arduino.h>
+
+namespace meshtastic
+{
+
+// Describes the state of the Bluetooth connection
+// Allows display to handle pairing events without each UI needing to explicitly hook the Bluefruit / NimBLE code
+class BluetoothStatus : public Status
+{
+  public:
+    enum class ConnectionState {
+        DISCONNECTED,
+        PAIRING,
+        CONNECTED,
+    };
+
+  private:
+    CallbackObserver<BluetoothStatus, const BluetoothStatus *> statusObserver =
+        CallbackObserver<BluetoothStatus, const BluetoothStatus *>(this, &BluetoothStatus::updateStatus);
+
+    ConnectionState state = ConnectionState::DISCONNECTED;
+    std::string passkey; // Stored as string, because Bluefruit allows passkeys with a leading zero
+
+  public:
+    BluetoothStatus() { statusType = STATUS_TYPE_BLUETOOTH; }
+
+    // New BluetoothStatus: connected or disconnected
+    BluetoothStatus(ConnectionState state)
+    {
+        assert(state != ConnectionState::PAIRING); // If pairing, use constructor which specifies passkey
+        statusType = STATUS_TYPE_BLUETOOTH;
+        this->state = state;
+    }
+
+    // New BluetoothStatus: pairing, with passkey
+    BluetoothStatus(std::string passkey) : Status()
+    {
+        statusType = STATUS_TYPE_BLUETOOTH;
+        this->state = ConnectionState::PAIRING;
+        this->passkey = passkey;
+    }
+
+    ConnectionState getConnectionState() const { return this->state; }
+
+    std::string getPasskey() const
+    {
+        assert(state == ConnectionState::PAIRING);
+        return this->passkey;
+    }
+
+    void observe(Observable<const BluetoothStatus *> *source) { statusObserver.observe(source); }
+
+    bool matches(const BluetoothStatus *newStatus) const
+    {
+        if (this->state == newStatus->getConnectionState()) {
+            // Same state: CONNECTED / DISCONNECTED
+            if (this->state != ConnectionState::PAIRING)
+                return true;
+            // Same state: PAIRING, and passkey matches
+            else if (this->getPasskey() == newStatus->getPasskey())
+                return true;
+        }
+
+        return false;
+    }
+
+    int updateStatus(const BluetoothStatus *newStatus)
+    {
+        // Has the status changed?
+        if (!matches(newStatus)) {
+            // Copy the members
+            state = newStatus->getConnectionState();
+            if (state == ConnectionState::PAIRING)
+                passkey = newStatus->getPasskey();
+
+            // Tell anyone interested that we have an update
+            onNewStatus.notifyObservers(this);
+
+            // Debug only:
+            switch (state) {
+            case ConnectionState::PAIRING:
+                LOG_DEBUG("BluetoothStatus PAIRING, key=%s", passkey.c_str());
+                break;
+            case ConnectionState::CONNECTED:
+                LOG_DEBUG("BluetoothStatus CONNECTED");
+                break;
+
+            case ConnectionState::DISCONNECTED:
+                LOG_DEBUG("BluetoothStatus DISCONNECTED");
+                break;
+            }
+        }
+
+        return 0;
+    }
+};
+
+} // namespace meshtastic
+
+extern meshtastic::BluetoothStatus *bluetoothStatus;

src/ButtonThread.cpp

@@ -11,6 +11,7 @@
 #include "main.h"
 #include "modules/ExternalNotificationModule.h"
 #include "power.h"
+#include "sleep.h"
 #ifdef ARCH_PORTDUINO
 #include "platform/portduino/PortduinoGlue.h"
 #endif
@@ -99,6 +100,13 @@ ButtonThread::ButtonThread() : OSThread("Button")
     userButtonTouch.attachLongPressStart(touchPressedLongStart); // Better handling with longpress than click?
 #endif
 
+#ifdef ARCH_ESP32
+    // Register callbacks for before and after lightsleep
+    // Used to detach and reattach interrupts
+    lsObserver.observe(&notifyLightSleep);
+    lsEndObserver.observe(&notifyLightSleepEnd);
+#endif
+
     attachButtonInterrupts();
 #endif
 }
@@ -320,6 +328,26 @@ void ButtonThread::detachButtonInterrupts()
 #endif
 }
 
+#ifdef ARCH_ESP32
+
+// Detach our class' interrupts before lightsleep
+// Allows sleep.cpp to configure its own interrupts, which wake the device on user-button press
+int ButtonThread::beforeLightSleep(void *unused)
+{
+    detachButtonInterrupts();
+    return 0; // Indicates success
+}
+
+// Reconfigure our interrupts
+// Our class' interrupts were disconnected during sleep, to allow the user button to wake the device from sleep
+int ButtonThread::afterLightSleep(esp_sleep_wakeup_cause_t cause)
+{
+    attachButtonInterrupts();
+    return 0; // Indicates success
+}
+
+#endif
+
 /**
  * Watch a GPIO and if we get an IRQ, wake the main thread.
  * Use to add wake on button press

src/ButtonThread.h

@@ -37,6 +37,12 @@ class ButtonThread : public concurrency::OSThread
     void detachButtonInterrupts();
     void storeClickCount();
 
+    // Disconnect and reconnect interrupts for light sleep
+#ifdef ARCH_ESP32
+    int beforeLightSleep(void *unused);
+    int afterLightSleep(esp_sleep_wakeup_cause_t cause);
+#endif
+
   private:
 #if defined(BUTTON_PIN) || defined(ARCH_PORTDUINO) || defined(USERPREFS_BUTTON_PIN)
     static OneButton userButton; // Static - accessed from an interrupt
@@ -48,6 +54,14 @@ class ButtonThread : public concurrency::OSThread
     OneButton userButtonTouch;
 #endif
 
+#ifdef ARCH_ESP32
+    // Get notified when lightsleep begins and ends
+    CallbackObserver<ButtonThread, void *> lsObserver =
+        CallbackObserver<ButtonThread, void *>(this, &ButtonThread::beforeLightSleep);
+    CallbackObserver<ButtonThread, esp_sleep_wakeup_cause_t> lsEndObserver =
+        CallbackObserver<ButtonThread, esp_sleep_wakeup_cause_t>(this, &ButtonThread::afterLightSleep);
+#endif
+
     // set during IRQ
     static volatile ButtonEventType btnEvent;
 

src/FSCommon.cpp

@@ -23,6 +23,10 @@ SPIClass SPI1(HSPI);
 #define SDHandler SPI
 #endif
 
+#ifndef SD_SPI_FREQUENCY
+#define SD_SPI_FREQUENCY 4000000U
+#endif
+
 #endif // HAS_SDCARD
 
 #if defined(ARCH_STM32WL)
@@ -361,8 +365,7 @@ void setupSDCard()
 #ifdef HAS_SDCARD
     concurrency::LockGuard g(spiLock);
     SDHandler.begin(SPI_SCK, SPI_MISO, SPI_MOSI);
-
+    if (!SD.begin(SDCARD_CS, SDHandler, SD_SPI_FREQUENCY)) {
-    if (!SD.begin(SDCARD_CS, SDHandler)) {
         LOG_DEBUG("No SD_MMC card detected");
         return;
     }

src/Status.h

@@ -7,6 +7,7 @@
 #define STATUS_TYPE_POWER 1
 #define STATUS_TYPE_GPS 2
 #define STATUS_TYPE_NODE 3
+#define STATUS_TYPE_BLUETOOTH 4
 
 namespace meshtastic
 {

src/detect/ScanI2CTwoWire.cpp

@@ -247,6 +247,10 @@ void ScanI2CTwoWire::scanPort(I2CPort port, uint8_t *address, uint8_t asize)
                         logFoundDevice("BMP-388", (uint8_t)addr.address);
                         type = BMP_3XX;
                         break;
+                    case 0x60: // BMP-390 should be 0x60
+                        logFoundDevice("BMP-390", (uint8_t)addr.address);
+                        type = BMP_3XX;
+                        break;
                     case 0x58: // BMP-280 should be 0x58
                     default:
                         logFoundDevice("BMP-280", (uint8_t)addr.address);
@@ -524,4 +528,4 @@ void ScanI2CTwoWire::logFoundDevice(const char *device, uint8_t address)
 {
     LOG_INFO("%s found at address 0x%x", device, address);
 }
-#endif
+#endif

src/detect/einkScan.h

@@ -6,28 +6,28 @@
 
 void d_writeCommand(uint8_t c)
 {
-    SPI.beginTransaction(SPISettings(4000000, MSBFIRST, SPI_MODE0));
+    SPI1.beginTransaction(SPISettings(4000000, MSBFIRST, SPI_MODE0));
     if (PIN_EINK_DC >= 0)
         digitalWrite(PIN_EINK_DC, LOW);
     if (PIN_EINK_CS >= 0)
         digitalWrite(PIN_EINK_CS, LOW);
-    SPI.transfer(c);
+    SPI1.transfer(c);
     if (PIN_EINK_CS >= 0)
         digitalWrite(PIN_EINK_CS, HIGH);
     if (PIN_EINK_DC >= 0)
         digitalWrite(PIN_EINK_DC, HIGH);
-    SPI.endTransaction();
+    SPI1.endTransaction();
 }
 
 void d_writeData(uint8_t d)
 {
-    SPI.beginTransaction(SPISettings(4000000, MSBFIRST, SPI_MODE0));
+    SPI1.beginTransaction(SPISettings(4000000, MSBFIRST, SPI_MODE0));
     if (PIN_EINK_CS >= 0)
         digitalWrite(PIN_EINK_CS, LOW);
-    SPI.transfer(d);
+    SPI1.transfer(d);
     if (PIN_EINK_CS >= 0)
         digitalWrite(PIN_EINK_CS, HIGH);
-    SPI.endTransaction();
+    SPI1.endTransaction();
 }
 
 unsigned long d_waitWhileBusy(uint16_t busy_time)
@@ -53,7 +53,7 @@ unsigned long d_waitWhileBusy(uint16_t busy_time)
 
 void scanEInkDevice(void)
 {
-    SPI.begin();
+    SPI1.begin();
     d_writeCommand(0x22);
     d_writeData(0x83);
     d_writeCommand(0x20);
@@ -62,6 +62,6 @@ void scanEInkDevice(void)
         LOG_DEBUG("EInk display found");
     else
         LOG_DEBUG("EInk display not found");
-    SPI.end();
+    SPI1.end();
 }
 #endif

src/gps/GPS.cpp

@@ -48,8 +48,6 @@ HardwareSerial *GPS::_serial_gps = nullptr;
 
 GPS *gps = nullptr;
 
-static const char *ACK_SUCCESS_MESSAGE = "Get ack success!";
-
 static GPSUpdateScheduling scheduling;
 
 /// Multiple GPS instances might use the same serial port (in sequence), but we can
@@ -437,6 +435,10 @@ static const int serialSpeeds[3] = {9600, 115200, 38400};
 static const int rareSerialSpeeds[3] = {4800, 57600, GPS_BAUDRATE};
 #endif
 
+#ifndef GPS_PROBETRIES
+#define GPS_PROBETRIES 2
+#endif
+
 /**
  * @brief  Setup the GPS based on the model detected.
  *  We detect the GPS by cycling through a set of baud rates, first common then rare.
@@ -460,11 +462,7 @@ bool GPS::setup()
             digitalWrite(PIN_GPS_EN, HIGH);
             delay(1000);
 #endif
-#ifdef TRACKER_T1000_E
+            if (probeTries < GPS_PROBETRIES) {
-            if (probeTries < 5) {
-#else
-            if (probeTries < 2) {
-#endif
                 LOG_DEBUG("Probe for GPS at %d", serialSpeeds[speedSelect]);
                 gnssModel = probe(serialSpeeds[speedSelect]);
                 if (gnssModel == GNSS_MODEL_UNKNOWN) {
@@ -475,11 +473,7 @@ bool GPS::setup()
                 }
             }
             // Rare Serial Speeds
-#ifdef TRACKER_T1000_E
+            if (probeTries == GPS_PROBETRIES) {
-            if (probeTries == 5) {
-#else
-            if (probeTries == 2) {
-#endif
                 LOG_DEBUG("Probe for GPS at %d", rareSerialSpeeds[speedSelect]);
                 gnssModel = probe(rareSerialSpeeds[speedSelect]);
                 if (gnssModel == GNSS_MODEL_UNKNOWN) {
@@ -1043,14 +1037,6 @@ int32_t GPS::runOnce()
         if (config.position.gps_mode != meshtastic_Config_PositionConfig_GpsMode_ENABLED) {
             return disable();
         }
-        // ONCE we will factory reset the GPS for bug #327
-        if (!devicestate.did_gps_reset) {
-            LOG_WARN("GPS FactoryReset requested");
-            if (gps->factoryReset()) { // If we don't succeed try again next time
-                devicestate.did_gps_reset = true;
-                nodeDB->saveToDisk(SEGMENT_DEVICESTATE);
-            }
-        }
         GPSInitFinished = true;
         publishUpdate();
     }
@@ -1063,24 +1049,6 @@ int32_t GPS::runOnce()
     if (whileActive()) {
         // if we have received valid NMEA claim we are connected
         setConnected();
-    } else {
-        if ((config.position.gps_mode == meshtastic_Config_PositionConfig_GpsMode_ENABLED) &&
-            IS_ONE_OF(gnssModel, GNSS_MODEL_UBLOX6, GNSS_MODEL_UBLOX7, GNSS_MODEL_UBLOX8, GNSS_MODEL_UBLOX9,
-                      GNSS_MODEL_UBLOX10)) {
-            // reset the GPS on next bootup
-            if (devicestate.did_gps_reset && scheduling.elapsedSearchMs() > 60 * 1000UL && !hasFlow()) {
-                LOG_DEBUG("GPS is not found, try factory reset on next boot");
-                devicestate.did_gps_reset = false;
-                nodeDB->saveToDisk(SEGMENT_DEVICESTATE);
-                return disable(); // Stop the GPS thread as it can do nothing useful until next reboot.
-            }
-        }
-    }
-    // At least one GPS has a bad habit of losing its mind from time to time
-    if (rebootsSeen > 2) {
-        rebootsSeen = 0;
-        LOG_DEBUG("Would normally factoryReset()");
-        // gps->factoryReset();
     }
 
     // If we're due for an update, wake the GPS
@@ -1415,62 +1383,6 @@ static int32_t toDegInt(RawDegrees d)
     return r;
 }
 
-bool GPS::factoryReset()
-{
-#ifdef PIN_GPS_REINIT
-    // The L76K GNSS on the T-Echo requires the RESET pin to be pulled LOW
-    pinMode(PIN_GPS_REINIT, OUTPUT);
-    digitalWrite(PIN_GPS_REINIT, 0);
-    delay(150); // The L76K datasheet calls for at least 100MS delay
-    digitalWrite(PIN_GPS_REINIT, 1);
-#endif
-
-    if (HW_VENDOR == meshtastic_HardwareModel_TBEAM) {
-        byte _message_reset1[] = {0xB5, 0x62, 0x06, 0x09, 0x0D, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0x00,
-                                  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x1C, 0xA2};
-        _serial_gps->write(_message_reset1, sizeof(_message_reset1));
-        if (getACK(0x05, 0x01, 10000)) {
-            LOG_DEBUG(ACK_SUCCESS_MESSAGE);
-        }
-        delay(100);
-        byte _message_reset2[] = {0xB5, 0x62, 0x06, 0x09, 0x0D, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0x00,
-                                  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x1B, 0xA1};
-        _serial_gps->write(_message_reset2, sizeof(_message_reset2));
-        if (getACK(0x05, 0x01, 10000)) {
-            LOG_DEBUG(ACK_SUCCESS_MESSAGE);
-        }
-        delay(100);
-        byte _message_reset3[] = {0xB5, 0x62, 0x06, 0x09, 0x0D, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-                                  0x00, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0x03, 0x1D, 0xB3};
-        _serial_gps->write(_message_reset3, sizeof(_message_reset3));
-        if (getACK(0x05, 0x01, 10000)) {
-            LOG_DEBUG(ACK_SUCCESS_MESSAGE);
-        }
-    } else if (gnssModel == GNSS_MODEL_MTK) {
-        // send the CAS10 to perform a factory restart of the device (and other device that support PCAS statements)
-        LOG_INFO("GNSS Factory Reset via PCAS10,3");
-        _serial_gps->write("$PCAS10,3*1F\r\n");
-        delay(100);
-    } else if (gnssModel == GNSS_MODEL_ATGM336H) {
-        LOG_INFO("Factory Reset via CAS-CFG-RST");
-        uint8_t msglen = makeCASPacket(0x06, 0x02, sizeof(_message_CAS_CFG_RST_FACTORY), _message_CAS_CFG_RST_FACTORY);
-        _serial_gps->write(UBXscratch, msglen);
-        delay(100);
-    } else {
-        // fire this for good measure, if we have an L76B - won't harm other devices.
-        _serial_gps->write("$PMTK104*37\r\n");
-        // No PMTK_ACK for this command.
-        delay(100);
-        // send the UBLOX Factory Reset Command regardless of detect state, something is very wrong, just assume it's
-        // UBLOX. Factory Reset
-        byte _message_reset[] = {0xB5, 0x62, 0x06, 0x09, 0x0D, 0x00, 0xFF, 0xFB, 0x00, 0x00, 0x00,
-                                 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0x17, 0x2B, 0x7E};
-        _serial_gps->write(_message_reset, sizeof(_message_reset));
-    }
-    delay(1000);
-    return true;
-}
-
 /**
  * Perform any processing that should be done only while the GPS is awake and looking for a fix.
  * Override this method to check for new locations

src/gps/GPS.h

@@ -101,8 +101,6 @@ class GPS : private concurrency::OSThread
     // Empty the input buffer as quickly as possible
     void clearBuffer();
 
-    virtual bool factoryReset();
-
     // Creates an instance of the GPS class.
     // Returns the new instance or null if the GPS is not present.
     static GPS *createGps();

src/graphics/niche/Drivers/Backlight/LatchingBacklight.cpp

@@ -0,0 +1,110 @@
+#ifdef MESHTASTIC_INCLUDE_NICHE_GRAPHICS
+
+#include "./LatchingBacklight.h"
+
+#include "assert.h"
+
+#include "sleep.h"
+
+using namespace NicheGraphics::Drivers;
+
+// Private constructor
+// Called by getInstance
+LatchingBacklight::LatchingBacklight()
+{
+    // Attach the deep sleep callback
+    deepSleepObserver.observe(&notifyDeepSleep);
+}
+
+// Get access to (or create) the singleton instance of this class
+LatchingBacklight *LatchingBacklight::getInstance()
+{
+    // Instantiate the class the first time this method is called
+    static LatchingBacklight *const singletonInstance = new LatchingBacklight;
+
+    return singletonInstance;
+}
+
+// Which pin controls the backlight?
+// Is the light active HIGH (default) or active LOW?
+void LatchingBacklight::setPin(uint8_t pin, bool activeWhen)
+{
+    this->pin = pin;
+    this->logicActive = activeWhen;
+
+    pinMode(pin, OUTPUT);
+    off(); // Explicit off seem required by T-Echo?
+}
+
+// Called when device is shutting down
+// Ensures the backlight is off
+int LatchingBacklight::beforeDeepSleep(void *unused)
+{
+    // We shouldn't need to guard the block like this
+    // Contingency for:
+    // - settings corruption: settings.optionalMenuItems.backlight guards backlight code in MenuApplet
+    // - improper use in the future
+    if (pin != (uint8_t)-1) {
+        off();
+        pinMode(pin, INPUT); // High impedence - unnecessary?
+    } else
+        LOG_WARN("LatchingBacklight instantiated, but pin not set");
+    return 0; // Continue with deep sleep
+}
+
+// Turn the backlight on *temporarily*
+// This should be used for momentary illumination, such as while a button is held
+// The effect on the backlight is the same; peek and latch are separated to simplify short vs long press button handling
+void LatchingBacklight::peek()
+{
+    assert(pin != (uint8_t)-1);
+    digitalWrite(pin, logicActive); // On
+    on = true;
+    latched = false;
+}
+
+// Turn the backlight on, and keep it on
+// This should be used when the backlight should remain active, even after user input ends
+// e.g. when enabled via the menu
+// The effect on the backlight is the same; peek and latch are separated to simplify short vs long press button handling
+void LatchingBacklight::latch()
+{
+    assert(pin != (uint8_t)-1);
+
+    // Blink if moving from peek to latch
+    // Indicates to user that the transition has taken place
+    if (on && !latched) {
+        digitalWrite(pin, !logicActive); // Off
+        delay(25);
+        digitalWrite(pin, logicActive); // On
+        delay(25);
+        digitalWrite(pin, !logicActive); // Off
+        delay(25);
+    }
+
+    digitalWrite(pin, logicActive); // On
+    on = true;
+    latched = true;
+}
+
+// Turn the backlight off
+// Suitable for ending both peek and latch
+void LatchingBacklight::off()
+{
+    assert(pin != (uint8_t)-1);
+    digitalWrite(pin, !logicActive); // Off
+    on = false;
+    latched = false;
+}
+
+bool LatchingBacklight::isOn()
+{
+    return on;
+}
+
+bool LatchingBacklight::isLatched()
+{
+    return latched;
+}
+
+#endif

src/graphics/niche/Drivers/Backlight/LatchingBacklight.h

@@ -0,0 +1,50 @@
+/*
+
+    Singleton class
+    On-demand control of a display's backlight, connected to a GPIO
+    Initial use case is control of T-Echo's frontlight, via the capacitive touch button
+
+    - momentary on
+    - latched on
+
+*/
+
+#pragma once
+
+#include "configuration.h"
+
+#include "Observer.h"
+
+namespace NicheGraphics::Drivers
+{
+
+class LatchingBacklight
+{
+  public:
+    static LatchingBacklight *getInstance(); // Create or get the singleton instance
+    void setPin(uint8_t pin, bool activeWhen = HIGH);
+
+    int beforeDeepSleep(void *unused); // Callback for auto-shutoff
+
+    void peek();  // Backlight on temporarily, e.g. while button held
+    void latch(); // Backlight on permanently, e.g. toggled via menu
+    void off();   // Backlight off. Suitable for both peek and latch
+
+    bool isOn(); // Either peek or latch
+    bool isLatched();
+
+  private:
+    LatchingBacklight(); // Constructor made private: force use of getInstance
+
+    // Get notified when the system is shutting down
+    CallbackObserver<LatchingBacklight, void *> deepSleepObserver =
+        CallbackObserver<LatchingBacklight, void *>(this, &LatchingBacklight::beforeDeepSleep);
+
+    uint8_t pin = (uint8_t)-1;
+    bool logicActive = HIGH; // Is light active HIGH or active LOW
+
+    bool on = false;      // Is light on (either peek or latched)
+    bool latched = false; // Is light latched on
+};
+
+} // namespace NicheGraphics::Drivers

src/graphics/niche/Drivers/EInk/DEPG0154BNS800.cpp

@@ -0,0 +1 @@
+#include "./DEPG0154BNS800.h"

src/graphics/niche/Drivers/EInk/DEPG0154BNS800.h

@@ -0,0 +1,34 @@
+/*
+
+E-Ink display driver
+    - DEPG0154BNS800
+    - Manufacturer: DKE
+    - Size: 1.54 inch
+    - Resolution: 152px x 152px
+    - Flex connector marking: FPC7525
+
+*/
+
+#pragma once
+
+#ifdef MESHTASTIC_INCLUDE_NICHE_GRAPHICS
+#include "configuration.h"
+
+#include "./SSD16XX.h"
+
+namespace NicheGraphics::Drivers
+{
+class DEPG0154BNS800 : public SSD16XX
+{
+    // Display properties
+  private:
+    static constexpr uint32_t width = 152;
+    static constexpr uint32_t height = 152;
+    static constexpr UpdateTypes supported = (UpdateTypes)(FULL);
+
+  public:
+    DEPG0154BNS800() : SSD16XX(width, height, supported, 1) {} // Note: left edge of this display is offset by 1 byte
+};
+
+} // namespace NicheGraphics::Drivers
+#endif // MESHTASTIC_INCLUDE_NICHE_GRAPHICS

src/graphics/niche/Drivers/EInk/DEPG0290BNS800.cpp

@@ -0,0 +1,120 @@
+#include "./DEPG0290BNS800.h"
+
+#ifdef MESHTASTIC_INCLUDE_NICHE_GRAPHICS
+
+using namespace NicheGraphics::Drivers;
+
+// Describes the operation performed when a "fast refresh" is performed
+// Source: custom, with DEPG0150BNS810 as a reference
+static const uint8_t LUT_FAST[] = {
+    // 1     2     3     4
+    0x40, 0x00, 0x40, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // B2B (Existing black pixels)
+    0x00, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // B2W (New white pixels)
+    0x00, 0x40, 0x40, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // W2B (New black pixels)
+    0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // W2W (Existing white pixels)
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // VCOM
+
+    0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 1. Tap existing black pixels back into place
+    0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 2. Move new pixels
+    0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 3. New pixels, and also existing black pixels
+    0x02, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, // 4. All pixels, then cooldown
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+
+    0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x00, 0x00, 0x00,
+};
+
+// How strongly the pixels are pulled and pushed
+void DEPG0290BNS800::configVoltages()
+{
+    switch (updateType) {
+    case FAST:
+        // Listed as "typical" in datasheet
+        sendCommand(0x04);
+        sendData(0x41); // VSH1 15V
+        sendData(0x00); // VSH2 NA
+        sendData(0x32); // VSL -15V
+        break;
+
+    case FULL:
+    default:
+        // From OTP memory
+        break;
+    }
+}
+
+// Load settings about how the pixels are moved from old state to new state during a refresh
+// - manually specified,
+// - or with stored values from displays OTP memory
+void DEPG0290BNS800::configWaveform()
+{
+    switch (updateType) {
+    case FAST:
+        sendCommand(0x3C); // Border waveform:
+        sendData(0x60);    // Actively hold screen border during update
+
+        sendCommand(0x32);                    // Write LUT register from MCU:
+        sendData(LUT_FAST, sizeof(LUT_FAST)); // (describes operation for a FAST refresh)
+        break;
+
+    case FULL:
+    default:
+        // From OTP memory
+        break;
+    }
+}
+
+// Describes the sequence of events performed by the displays controller IC during a refresh
+// Includes "power up", "load settings from memory", "update the pixels", etc
+void DEPG0290BNS800::configUpdateSequence()
+{
+    switch (updateType) {
+    case FAST:
+        sendCommand(0x22); // Set "update sequence"
+        sendData(0xCF);    // Differential, use manually loaded waveform
+        break;
+
+    case FULL:
+    default:
+        sendCommand(0x22); // Set "update sequence"
+        sendData(0xF7);    // Non-differential, load waveform from OTP
+        break;
+    }
+}
+
+// Once the refresh operation has been started,
+// begin periodically polling the display to check for completion, using the normal Meshtastic threading code
+// Only used when refresh is "async"
+void DEPG0290BNS800::detachFromUpdate()
+{
+    switch (updateType) {
+    case FAST:
+        return beginPolling(50, 450); // At least 450ms for fast refresh
+    case FULL:
+    default:
+        return beginPolling(100, 3000); // At least 3 seconds for full refresh
+    }
+}
+
+// For this display, we do not need to re-write the new image.
+// We're overriding SSD16XX::finalizeUpdate to make this small optimization.
+// The display does also work just fine with the generic SSD16XX method, though.
+void DEPG0290BNS800::finalizeUpdate()
+{
+    // Put a copy of the image into the "old memory".
+    // Used with differential refreshes (e.g. FAST update), to determine which px need to move, and which can remain in place
+    // We need to keep the "old memory" up to date, because don't know whether next refresh will be FULL or FAST etc.
+    if (updateType != FULL) {
+        // writeNewImage(); // Not required for this display
+        writeOldImage();
+        sendCommand(0x7F); // Terminate image write without update
+        wait();
+    }
+}
+#endif // MESHTASTIC_INCLUDE_NICHE_GRAPHICS

src/graphics/niche/Drivers/EInk/DEPG0290BNS800.h

@@ -0,0 +1,42 @@
+/*
+
+E-Ink display driver
+    - DEPG0290BNS800
+    - Manufacturer: DKE
+    - Size: 2.9 inch
+    - Resolution: 128px x 296px
+    - Flex connector marking: FPC-7519 rev.b
+
+*/
+
+#pragma once
+
+#ifdef MESHTASTIC_INCLUDE_NICHE_GRAPHICS
+
+#include "configuration.h"
+
+#include "./SSD16XX.h"
+
+namespace NicheGraphics::Drivers
+{
+class DEPG0290BNS800 : public SSD16XX
+{
+    // Display properties
+  private:
+    static constexpr uint32_t width = 128;
+    static constexpr uint32_t height = 296;
+    static constexpr UpdateTypes supported = (UpdateTypes)(FULL | FAST);
+
+  public:
+    DEPG0290BNS800() : SSD16XX(width, height, supported, 1) {} // Note: left edge of this display is offset by 1 byte
+
+  protected:
+    void configVoltages() override;
+    void configWaveform() override;
+    void configUpdateSequence() override;
+    void detachFromUpdate() override;
+    void finalizeUpdate() override; // Only overriden for a slight optimization
+};
+
+} // namespace NicheGraphics::Drivers
+#endif // MESHTASTIC_INCLUDE_NICHE_GRAPHICS

src/graphics/niche/Drivers/EInk/EInk.cpp

@@ -0,0 +1,70 @@
+#include "./EInk.h"
+
+#ifdef MESHTASTIC_INCLUDE_NICHE_GRAPHICS
+
+using namespace NicheGraphics::Drivers;
+
+// Separate from EInk::begin method, as derived class constructors can probably supply these parameters as constants
+EInk::EInk(uint16_t width, uint16_t height, UpdateTypes supported)
+    : concurrency::OSThread("E-Ink Driver"), width(width), height(height), supportedUpdateTypes(supported)
+{
+    OSThread::disable();
+}
+
+// Used by NicheGraphics implementations to check if a display supports a specific refresh operation.
+// Whether or the update type is supported is specified in the constructor
+bool EInk::supports(UpdateTypes type)
+{
+    // The EInkUpdateTypes enum assigns each type a unique bit. We are checking if that bit is set.
+    if (supportedUpdateTypes & type)
+        return true;
+    else
+        return false;
+}
+
+// Begins using the OSThread to detect when a display update is complete
+// This allows the refresh operation to run "asynchronously".
+// Rather than blocking execution waiting for the update to complete, we are periodically checking the hardware's BUSY pin
+// The expectedDuration argument allows us to delay the start of this checking, if we know "roughly" how long an update takes.
+// Potentially, a display without hardware BUSY could rely entirely on "expectedDuration",
+// provided its isUpdateDone() override always returns true.
+void EInk::beginPolling(uint32_t interval, uint32_t expectedDuration)
+{
+    updateRunning = true;
+    updateBegunAt = millis();
+    pollingInterval = interval;
+
+    // To minimize load, we can choose to delay polling for a few seconds, if we know roughly how long the update will take
+    // By default, expectedDuration is 0, and we'll start polling immediately
+    OSThread::setIntervalFromNow(expectedDuration);
+    OSThread::enabled = true;
+}
+
+// Meshtastic's pseudo-threading layer
+// We're using this as a timer, to periodically check if an update is complete
+// This is what allows us to update the display asynchronously
+int32_t EInk::runOnce()
+{
+    if (!isUpdateDone())
+        return pollingInterval; // Poll again in a few ms
+
+    // If update done:
+    finalizeUpdate();      // Any post-update code: power down panel hardware, hibernate, etc
+    updateRunning = false; // Change what we report via EInk::busy()
+    return disable();      // Stop polling
+}
+
+// Wait for an in progress update to complete before continuing
+// Run a normal (async) update first, *then* call await
+void EInk::await()
+{
+    // Stop our concurrency thread
+    OSThread::disable();
+
+    // Sit and block until the update is complete
+    while (updateRunning) {
+        runOnce();
+        yield();
+    }
+}
+#endif // MESHTASTIC_INCLUDE_NICHE_GRAPHICS

src/graphics/niche/Drivers/EInk/EInk.h

@@ -0,0 +1,56 @@
+/*
+
+    Base class for E-Ink display drivers
+
+*/
+
+#pragma once
+
+#ifdef MESHTASTIC_INCLUDE_NICHE_GRAPHICS
+#include "configuration.h"
+
+#include "concurrency/OSThread.h"
+#include <SPI.h>
+
+namespace NicheGraphics::Drivers
+{
+
+class EInk : private concurrency::OSThread
+{
+  public:
+    // Different possible operations used to update an E-Ink display
+    // Some displays will not support all operations
+    // Each value needs a unique bit. In some cases, we might set more than one bit (e.g. EInk::supportedUpdateType)
+    enum UpdateTypes : uint8_t {
+        UNSPECIFIED = 0,
+        FULL = 1 << 0,
+        FAST = 1 << 1,
+    };
+
+    EInk(uint16_t width, uint16_t height, UpdateTypes supported);
+    virtual void begin(SPIClass *spi, uint8_t pin_dc, uint8_t pin_cs, uint8_t pin_busy, uint8_t pin_rst = -1) = 0;
+    virtual void update(uint8_t *imageData, UpdateTypes type) = 0; // Change the display image
+    void await();                                                  // Wait for an in-progress update to complete before proceeding
+    bool supports(UpdateTypes type);                               // Can display perfom a certain update type
+    bool busy() { return updateRunning; }                          // Display able to update right now?
+
+    const uint16_t width; // Public so that NicheGraphics implementations can access. Safe because const.
+    const uint16_t height;
+
+  protected:
+    void beginPolling(uint32_t interval, uint32_t expectedDuration); // Begin checking repeatedly if update finished
+    virtual bool isUpdateDone() = 0;                                 // Check once if update finished
+    virtual void finalizeUpdate() {}                                 // Run any post-update code
+
+  private:
+    int32_t runOnce() override; // Repeated checking if update finished
+
+    const UpdateTypes supportedUpdateTypes; // Capabilities of a derived display class
+    bool updateRunning = false;             // see EInk::busy()
+    uint32_t updateBegunAt;                 // For initial pause before polling for update completion
+    uint32_t pollingInterval;               // How often to check if update complete (ms)
+};
+
+} // namespace NicheGraphics::Drivers
+
+#endif // MESHTASTIC_INCLUDE_NICHE_GRAPHICS

src/graphics/niche/Drivers/EInk/GDEY0154D67.cpp

@@ -0,0 +1,61 @@
+#include "./GDEY0154D67.h"
+
+#ifdef MESHTASTIC_INCLUDE_NICHE_GRAPHICS
+
+using namespace NicheGraphics::Drivers;
+
+// Map the display controller IC's output to the conected panel
+void GDEY0154D67::configScanning()
+{
+    // "Driver output control"
+    sendCommand(0x01);
+    sendData(0xC7);
+    sendData(0x00);
+    sendData(0x00);
+
+    // To-do: delete this method?
+    // Values set here might be redundant: C7, 00, 00 seems to be default
+}
+
+// Specify which information is used to control the sequence of voltages applied to move the pixels
+// - For this display, configUpdateSequence() specifies that a suitable LUT will be loaded from
+//   the controller IC's OTP memory, when the update procedure begins.
+void GDEY0154D67::configWaveform()
+{
+    sendCommand(0x3C); // Border waveform:
+    sendData(0x05);    // Screen border should follow LUT1 waveform (actively drive pixels white)
+
+    sendCommand(0x18); // Temperature sensor:
+    sendData(0x80);    // Use internal temperature sensor to select an appropriate refresh waveform
+}
+
+void GDEY0154D67::configUpdateSequence()
+{
+    switch (updateType) {
+    case FAST:
+        sendCommand(0x22); // Set "update sequence"
+        sendData(0xFF);    // Will load LUT from OTP memory, Display mode 2 "differential refresh"
+        break;
+
+    case FULL:
+    default:
+        sendCommand(0x22); // Set "update sequence"
+        sendData(0xF7);    // Will load LUT from OTP memory
+        break;
+    }
+}
+
+// Once the refresh operation has been started,
+// begin periodically polling the display to check for completion, using the normal Meshtastic threading code
+// Only used when refresh is "async"
+void GDEY0154D67::detachFromUpdate()
+{
+    switch (updateType) {
+    case FAST:
+        return beginPolling(50, 500); // At least 500ms for fast refresh
+    case FULL:
+    default:
+        return beginPolling(100, 2000); // At least 2 seconds for full refresh
+    }
+}
+#endif // MESHTASTIC_INCLUDE_NICHE_GRAPHICS

src/graphics/niche/Drivers/EInk/GDEY0154D67.h

@@ -0,0 +1,42 @@
+/*
+
+E-Ink display driver
+    - GDEY0154D67
+    - Manufacturer: Goodisplay
+    - Size: 1.54 inch
+    - Resolution: 200px x 200px
+    - Flex connector marking: FPC-B001
+
+*/
+
+#pragma once
+
+#ifdef MESHTASTIC_INCLUDE_NICHE_GRAPHICS
+
+#include "configuration.h"
+
+#include "./SSD16XX.h"
+
+namespace NicheGraphics::Drivers
+{
+class GDEY0154D67 : public SSD16XX
+{
+    // Display properties
+  private:
+    static constexpr uint32_t width = 200;
+    static constexpr uint32_t height = 200;
+    static constexpr UpdateTypes supported = (UpdateTypes)(FULL | FAST);
+
+  public:
+    GDEY0154D67() : SSD16XX(width, height, supported) {}
+
+  protected:
+    virtual void configScanning() override;
+    virtual void configWaveform() override;
+    virtual void configUpdateSequence() override;
+    void detachFromUpdate() override;
+};
+
+} // namespace NicheGraphics::Drivers
+
+#endif // MESHTASTIC_INCLUDE_NICHE_GRAPHICS

src/graphics/niche/Drivers/EInk/LCMEN2R13EFC1.cpp

@@ -0,0 +1,301 @@
+#include "./LCMEN2R13EFC1.h"
+
+#ifdef MESHTASTIC_INCLUDE_NICHE_GRAPHICS
+
+#include <assert.h>
+
+using namespace NicheGraphics::Drivers;
+
+// Look up table: fast refresh, common electrode
+static const uint8_t LUT_FAST_VCOMDC[] = {
+    0x01, 0x06, 0x03, 0x02, 0x01, 0x01, 0x01, //
+    0x01, 0x06, 0x02, 0x01, 0x01, 0x01, 0x01, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+};
+
+// Look up table: fast refresh, pixels which remain white
+static const uint8_t LUT_FAST_WW[] = {
+    0x01, 0x06, 0x03, 0x02, 0x81, 0x01, 0x01, //
+    0x01, 0x06, 0x02, 0x01, 0x01, 0x01, 0x01, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+};
+
+// Look up table: fast refresh, pixel which change from black to white
+static const uint8_t LUT_FAST_BW[] = {
+    0x01, 0x86, 0x83, 0x82, 0x81, 0x01, 0x01, //
+    0x01, 0x86, 0x82, 0x01, 0x01, 0x01, 0x01, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+};
+
+// Look up table: fash refresh, pixels which change from white to black
+static const uint8_t LUT_FAST_WB[] = {
+    0x01, 0x46, 0x42, 0x01, 0x01, 0x01, 0x01, //
+    0x01, 0x46, 0x42, 0x01, 0x01, 0x01, 0x01, //
+    0x01, 0x46, 0x43, 0x02, 0x01, 0x01, 0x01, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+};
+
+// Look up table: fash refresh, pixels which remain black
+static const uint8_t LUT_FAST_BB[] = {
+    0x01, 0x06, 0x03, 0x42, 0x41, 0x01, 0x01, //
+    0x01, 0x06, 0x02, 0x01, 0x01, 0x01, 0x01, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //
+};
+
+LCMEN213EFC1::LCMEN213EFC1() : EInk(width, height, supported)
+{
+    // Pre-calculate size of the image buffer, for convenience
+
+    // Determine the X dimension of the image buffer, in bytes.
+    // Along rows, pixels are stored 8 per byte.
+    // Not all display widths are divisible by 8. Need to make sure bytecount accommodates padding for these.
+    bufferRowSize = ((width - 1) / 8) + 1;
+
+    // Total size of image buffer, in bytes.
+    bufferSize = bufferRowSize * height;
+}
+
+void LCMEN213EFC1::begin(SPIClass *spi, uint8_t pin_dc, uint8_t pin_cs, uint8_t pin_busy, uint8_t pin_rst)
+{
+    this->spi = spi;
+    this->pin_dc = pin_dc;
+    this->pin_cs = pin_cs;
+    this->pin_busy = pin_busy;
+    this->pin_rst = pin_rst;
+
+    pinMode(pin_dc, OUTPUT);
+    pinMode(pin_cs, OUTPUT);
+    pinMode(pin_busy, INPUT);
+
+    // Reset is active low, hold high
+    pinMode(pin_rst, INPUT_PULLUP);
+
+    reset();
+}
+
+void LCMEN213EFC1::update(uint8_t *imageData, UpdateTypes type)
+{
+    this->updateType = type;
+    this->buffer = imageData;
+
+    reset();
+
+    // Config
+    if (updateType == FULL)
+        configFull();
+    else
+        configFast();
+
+    // Transfer image data
+    if (updateType == FULL) {
+        writeNewImage();
+        writeOldImage();
+    } else {
+        writeNewImage();
+    }
+
+    sendCommand(0x04); // Power on the panel voltage
+    wait();
+
+    sendCommand(0x12); // Begin executing the update
+
+    // Let the update run async, on display hardware. Base class will poll completion, then finalize.
+    // For a blocking update, call await after update
+    detachFromUpdate();
+}
+
+void LCMEN213EFC1::wait()
+{
+    // Busy when LOW
+    while (digitalRead(pin_busy) == LOW)
+        yield();
+}
+
+void LCMEN213EFC1::reset()
+{
+    pinMode(pin_rst, OUTPUT);
+    digitalWrite(pin_rst, LOW);
+    delay(10);
+    pinMode(pin_rst, INPUT_PULLUP);
+    wait();
+
+    sendCommand(0x12);
+    wait();
+}
+
+void LCMEN213EFC1::sendCommand(const uint8_t command)
+{
+    spi->beginTransaction(spiSettings);
+    digitalWrite(pin_dc, LOW); // DC pin low indicates command
+    digitalWrite(pin_cs, LOW);
+    spi->transfer(command);
+    digitalWrite(pin_cs, HIGH);
+    digitalWrite(pin_dc, HIGH);
+    spi->endTransaction();
+}
+
+void LCMEN213EFC1::sendData(uint8_t data)
+{
+    // spi->beginTransaction(spiSettings);
+    // digitalWrite(pin_dc, HIGH); // DC pin HIGH indicates data, instead of command
+    // digitalWrite(pin_cs, LOW);
+    // spi->transfer(data);
+    // digitalWrite(pin_cs, HIGH);
+    // digitalWrite(pin_dc, HIGH);
+    // spi->endTransaction();
+    sendData(&data, 1);
+}
+
+void LCMEN213EFC1::sendData(const uint8_t *data, uint32_t size)
+{
+    spi->beginTransaction(spiSettings);
+    digitalWrite(pin_dc, HIGH); // DC pin HIGH indicates data, instead of command
+    digitalWrite(pin_cs, LOW);
+
+    // Platform-specific SPI command
+    // Mothballing. This display model is only used by Heltec Wireless Paper (ESP32)
+#if defined(ARCH_ESP32)
+    spi->transferBytes(data, NULL, size); // NULL for a "write only" transfer
+#elif defined(ARCH_NRF52)
+    spi->transfer(data, NULL, size); // NULL for a "write only" transfer
+#else
+#error Not implemented yet? Feel free to add other platforms here.
+#endif
+
+    digitalWrite(pin_cs, HIGH);
+    digitalWrite(pin_dc, HIGH);
+    spi->endTransaction();
+}
+
+void LCMEN213EFC1::configFull()
+{
+    sendCommand(0x00); // Panel setting register
+    sendData(0b11 << 6 // Display resolution
+             | 1 << 4  // B&W only
+             | 1 << 3  // Vertical scan direction
+             | 1 << 2  // Horizontal scan direction
+             | 1 << 1  // Shutdown: no
+             | 1 << 0  // Reset: no
+    );
+
+    sendCommand(0x50);     // VCOM and data interval setting register
+    sendData(0b10 << 6     // Border driven white
+             | 0b11 << 4   // Invert image colors: no
+             | 0b0111 << 0 // Interval between VCOM on and image data (default)
+    );
+}
+
+void LCMEN213EFC1::configFast()
+{
+    sendCommand(0x00); // Panel setting register
+    sendData(0b11 << 6 // Display resolution
+             | 1 << 5  // LUT from registers (set below)
+             | 1 << 4  // B&W only
+             | 1 << 3  // Vertical scan direction
+             | 1 << 2  // Horizontal scan direction
+             | 1 << 1  // Shutdown: no
+             | 1 << 0  // Reset: no
+    );
+
+    sendCommand(0x50);     // VCOM and data interval setting register
+    sendData(0b11 << 6     // Border floating
+             | 0b01 << 4   // Invert image colors: no
+             | 0b0111 << 0 // Interval between VCOM on and image data (default)
+    );
+
+    // Load the various LUTs
+    sendCommand(0x20); // VCOM
+    sendData(LUT_FAST_VCOMDC, sizeof(LUT_FAST_VCOMDC));
+
+    sendCommand(0x21); // White -> White
+    sendData(LUT_FAST_WW, sizeof(LUT_FAST_WW));
+
+    sendCommand(0x22); // Black -> White
+    sendData(LUT_FAST_BW, sizeof(LUT_FAST_BW));
+
+    sendCommand(0x23); // White -> Black
+    sendData(LUT_FAST_WB, sizeof(LUT_FAST_WB));
+
+    sendCommand(0x24); // Black -> Black
+    sendData(LUT_FAST_BB, sizeof(LUT_FAST_BB));
+}
+
+void LCMEN213EFC1::writeNewImage()
+{
+    sendCommand(0x13);
+    sendData(buffer, bufferSize);
+}
+
+void LCMEN213EFC1::writeOldImage()
+{
+    sendCommand(0x10);
+    sendData(buffer, bufferSize);
+}
+
+void LCMEN213EFC1::detachFromUpdate()
+{
+    // To save power / cycles, displays can choose to specify an "expected duration" for various refresh types
+    // If we know a full-refresh takes at least 4 seconds, we can delay polling until 3 seconds have passed
+    // If not implemented, we'll just poll right from the get-go
+    switch (updateType) {
+    case FULL:
+        EInk::beginPolling(10, 3650);
+        break;
+    case FAST:
+        EInk::beginPolling(10, 720);
+        break;
+    default:
+        assert(false);
+    }
+}
+
+bool LCMEN213EFC1::isUpdateDone()
+{
+    // Busy when LOW
+    if (digitalRead(pin_busy) == LOW)
+        return false;
+    else
+        return true;
+}
+
+void LCMEN213EFC1::finalizeUpdate()
+{
+    // Power off the panel voltages
+    sendCommand(0x02);
+    wait();
+
+    // Put a copy of the image into the "old memory".
+    // Used with differential refreshes (e.g. FAST update), to determine which px need to move, and which can remain in place
+    // We need to keep the "old memory" up to date, because don't know whether next refresh will be FULL or FAST etc.
+    if (updateType != FULL) {
+        writeOldImage();
+        wait();
+    }
+}
+
+#endif // MESHTASTIC_INCLUDE_NICHE_GRAPHICS

src/graphics/niche/Drivers/EInk/LCMEN2R13EFC1.h

@@ -0,0 +1,68 @@
+/*
+
+E-Ink display driver
+    - LCMEN213EFC1
+    - Manufacturer: Wisevast
+    - Size: 2.13 inch
+    - Resolution: 122px x 250px
+    - Flex connector marking: HINK-E0213A162-FPC-A0 (Hidden, printed on back-side)
+
+Note: this display uses an uncommon controller IC, Fitipower JD79656.
+It is implemented as a "one-off", directly inheriting the EInk base class, unlike SSD16XX displays.
+
+*/
+
+#pragma once
+
+#ifdef MESHTASTIC_INCLUDE_NICHE_GRAPHICS
+
+#include "configuration.h"
+
+#include "./EInk.h"
+
+namespace NicheGraphics::Drivers
+{
+
+class LCMEN213EFC1 : public EInk
+{
+    // Display properties
+  private:
+    static constexpr uint32_t width = 122;
+    static constexpr uint32_t height = 250;
+    static constexpr UpdateTypes supported = (UpdateTypes)(FULL | FAST);
+
+  public:
+    LCMEN213EFC1();
+    void begin(SPIClass *spi, uint8_t pin_dc, uint8_t pin_cs, uint8_t pin_busy, uint8_t pin_rst);
+    void update(uint8_t *imageData, UpdateTypes type) override;
+
+  protected:
+    void wait();
+    void reset();
+    void sendCommand(const uint8_t command);
+    void sendData(const uint8_t data);
+    void sendData(const uint8_t *data, uint32_t size);
+    void configFull(); // Configure display for FULL refresh
+    void configFast(); // Configure display for FAST refresh
+    void writeNewImage();
+    void writeOldImage();
+
+    void detachFromUpdate();
+    bool isUpdateDone();
+    void finalizeUpdate();
+
+  protected:
+    uint8_t bufferOffsetX; // In bytes. Panel x=0 does not always align with controller x=0. Quirky internal wiring?
+    uint8_t bufferRowSize; // In bytes. Rows store 8 pixels per byte. Rounded up to fit (e.g. 122px would require 16 bytes)
+    uint32_t bufferSize;   // In bytes. Rows * Columns
+    uint8_t *buffer;
+    UpdateTypes updateType;
+
+    uint8_t pin_dc, pin_cs, pin_busy, pin_rst;
+    SPIClass *spi;
+    SPISettings spiSettings = SPISettings(6000000, MSBFIRST, SPI_MODE0);
+};
+
+} // namespace NicheGraphics::Drivers
+
+#endif // MESHTASTIC_INCLUDE_NICHE_GRAPHICS

src/graphics/niche/Drivers/EInk/README.md

@@ -0,0 +1,82 @@
+# NicheGraphics - E-Ink Driver
+
+A driver for E-Ink SPI displays. Suitable for re-use by various NicheGraphics UIs.
+
+Your UI should use the class `NicheGraphics::Drivers::EInk` .
+When you set up a hardware variant, you will use one of specific display model classes, which extend the EInk class.
+
+An example setup might look like this:
+
+```cpp
+void setupNicheGraphics()
+{
+    using namespace NicheGraphics;
+
+    // An imaginary UI
+    YourCustomUI *yourUI = new YourCustomUI();
+
+    // Setup SPI
+    SPIClass *hspi = new SPIClass(HSPI);
+    hspi->begin(PIN_EINK_SCLK, -1, PIN_EINK_MOSI, PIN_EINK_CS);
+
+    // Setup Enk driver
+    Drivers::EInk *driver = new Drivers::DEPG0290BNS800;
+    driver->begin(hspi, PIN_EINK_DC, PIN_EINK_CS, PIN_EINK_BUSY);
+
+    // Pass the driver to your UI
+    YourUI::driver = driver;
+}
+```
+
+## Methods
+
+### `update(uint8_t *imageData, UpdateTypes type, bool async=true)`
+
+Update the image on the display
+
+- _`imageData`_ to draw to the display.
+- _`type`_ which type of update to perform.
+  - `FULL`
+  - `FAST`
+  - (Other custom types may be possible)
+- _`async`_ whether to wait for update to complete, or continue code execution
+
+The imageData is a 1-bit image. X-Pixels are 8-per byte, with the MSB being the leftmost pixel. This was not an InkHUD design decision; it is the raw format accepted by the E-Ink display controllers ICs.
+
+_To-do: add a helper method to `InkHUD::Drivers::EInk` to do this arithmetic for you._
+
+```cpp
+uint16_t w = driver::width();
+uint16_t h = driver::height();
+
+uint8_t image[ (w/8) * h ]; // X pixels are 8-per-byte
+
+image[0] |= (1 << 7); // Set pixel x=0, y=0
+image[0] |= (1 << 0); // Set pixel x=7, y=0
+image[1] |= (1 << 7); // Set pixel x=8, y=0
+
+uint8_t x = 12;
+uint8_t y = 2;
+uint8_t yBytes = y * (w/8);
+uint8_t xBytes = x / 8;
+uint8_t xBits = (7-x) % 8;
+image[yByte + xByte] |= (1 << xBits); // Set pixel x=12, y=2
+```
+
+### `supports(UpdateTypes type)`
+
+Check if display supports a specific update type. `true` if supported.
+
+- _`type`_ type to check
+
+### `busy()`
+
+Check if display is already performing an `update()`. `true` if already updating.
+
+### `width()`
+
+Width of the display, in pixels. Note: most displays are portait. Your UI will need to implement rotation in software.
+
+### `height()`
+
+Height of the display, in pixels. Note: most displays are portrait. Your UI will need to implement rotation in software.

src/graphics/niche/Drivers/EInk/SSD16XX.cpp

@@ -0,0 +1,227 @@
+#include "./SSD16XX.h"
+
+#ifdef MESHTASTIC_INCLUDE_NICHE_GRAPHICS
+using namespace NicheGraphics::Drivers;
+
+SSD16XX::SSD16XX(uint16_t width, uint16_t height, UpdateTypes supported, uint8_t bufferOffsetX)
+    : EInk(width, height, supported), bufferOffsetX(bufferOffsetX)
+{
+    // Pre-calculate size of the image buffer, for convenience
+
+    // Determine the X dimension of the image buffer, in bytes.
+    // Along rows, pixels are stored 8 per byte.
+    // Not all display widths are divisible by 8. Need to make sure bytecount accommodates padding for these.
+    bufferRowSize = ((width - 1) / 8) + 1;
+
+    // Total size of image buffer, in bytes.
+    bufferSize = bufferRowSize * height;
+}
+
+void SSD16XX::begin(SPIClass *spi, uint8_t pin_dc, uint8_t pin_cs, uint8_t pin_busy, uint8_t pin_rst)
+{
+    this->spi = spi;
+    this->pin_dc = pin_dc;
+    this->pin_cs = pin_cs;
+    this->pin_busy = pin_busy;
+    this->pin_rst = pin_rst;
+
+    pinMode(pin_dc, OUTPUT);
+    pinMode(pin_cs, OUTPUT);
+    pinMode(pin_busy, INPUT);
+
+    // If using a reset pin, hold high
+    // Reset is active low for solmon systech ICs
+    if (pin_rst != 0xFF)
+        pinMode(pin_rst, INPUT_PULLUP);
+
+    reset();
+}
+
+void SSD16XX::wait()
+{
+    // Busy when HIGH
+    while (digitalRead(pin_busy) == HIGH)
+        yield();
+}
+
+void SSD16XX::reset()
+{
+    // Check if reset pin is defined
+    if (pin_rst != 0xFF) {
+        pinMode(pin_rst, OUTPUT);
+        digitalWrite(pin_rst, LOW);
+        delay(50);
+        pinMode(pin_rst, INPUT_PULLUP);
+        wait();
+    }
+
+    sendCommand(0x12);
+    wait();
+}
+
+void SSD16XX::sendCommand(const uint8_t command)
+{
+    spi->beginTransaction(spiSettings);
+    digitalWrite(pin_dc, LOW); // DC pin low indicates command
+    digitalWrite(pin_cs, LOW);
+    spi->transfer(command);
+    digitalWrite(pin_cs, HIGH);
+    digitalWrite(pin_dc, HIGH);
+    spi->endTransaction();
+}
+
+void SSD16XX::sendData(uint8_t data)
+{
+    // spi->beginTransaction(spiSettings);
+    // digitalWrite(pin_dc, HIGH); // DC pin HIGH indicates data, instead of command
+    // digitalWrite(pin_cs, LOW);
+    // spi->transfer(data);
+    // digitalWrite(pin_cs, HIGH);
+    // digitalWrite(pin_dc, HIGH);
+    // spi->endTransaction();
+    sendData(&data, 1);
+}
+
+void SSD16XX::sendData(const uint8_t *data, uint32_t size)
+{
+    spi->beginTransaction(spiSettings);
+    digitalWrite(pin_dc, HIGH); // DC pin HIGH indicates data, instead of command
+    digitalWrite(pin_cs, LOW);
+
+    // Platform-specific SPI command
+#if defined(ARCH_ESP32)
+    spi->transferBytes(data, NULL, size); // NULL for a "write only" transfer
+#elif defined(ARCH_NRF52)
+    spi->transfer(data, NULL, size); // NULL for a "write only" transfer
+#else
+#error Not implemented yet? Feel free to add other platforms here.
+#endif
+
+    digitalWrite(pin_cs, HIGH);
+    digitalWrite(pin_dc, HIGH);
+    spi->endTransaction();
+}
+
+void SSD16XX::configFullscreen()
+{
+    // Placing this code in a separate method because it's probably pretty consistent between displays
+    // Should make it tidier to override SSD16XX::configure
+
+    // Define the boundaries of the "fullscreen" region, for the controller IC
+    static const uint16_t sx = bufferOffsetX; // Notice the offset
+    static const uint16_t sy = 0;
+    static const uint16_t ex = bufferRowSize + bufferOffsetX - 1; // End is "max index", not "count". Minus 1 handles this
+    static const uint16_t ey = height;
+
+    // Split into bytes
+    static const uint8_t sy1 = sy & 0xFF;
+    static const uint8_t sy2 = (sy >> 8) & 0xFF;
+    static const uint8_t ey1 = ey & 0xFF;
+    static const uint8_t ey2 = (ey >> 8) & 0xFF;
+
+    // Data entry mode - Left to Right, Top to Bottom
+    sendCommand(0x11);
+    sendData(0x03);
+
+    // Select controller IC memory region to display a fullscreen image
+    sendCommand(0x44); // Memory X start - end
+    sendData(sx);
+    sendData(ex);
+    sendCommand(0x45); // Memory Y start - end
+    sendData(sy1);
+    sendData(sy2);
+    sendData(ey1);
+    sendData(ey2);
+
+    // Place the cursor at the start of this memory region, ready to send image data x=0 y=0
+    sendCommand(0x4E); // Memory cursor X
+    sendData(sx);
+    sendCommand(0x4F); // Memory cursor y
+    sendData(sy1);
+    sendData(sy2);
+}
+
+void SSD16XX::update(uint8_t *imageData, UpdateTypes type)
+{
+    this->updateType = type;
+    this->buffer = imageData;
+
+    reset();
+
+    configFullscreen();
+    configScanning(); // Virtual, unused by base class
+    configVoltages(); // Virtual, unused by base class
+    configWaveform(); // Virtual, unused by base class
+    wait();
+
+    if (updateType == FULL) {
+        writeNewImage();
+        writeOldImage();
+    } else {
+        writeNewImage();
+    }
+
+    configUpdateSequence();
+    sendCommand(0x20); // Begin executing the update
+
+    // Let the update run async, on display hardware. Base class will poll completion, then finalize.
+    // For a blocking update, call await after update
+    detachFromUpdate();
+}
+
+// Send SPI commands for controller IC to begin executing the refresh operation
+void SSD16XX::configUpdateSequence()
+{
+    switch (updateType) {
+    default:
+        sendCommand(0x22); // Set "update sequence"
+        sendData(0xF7);    // Non-differential, load waveform from OTP
+        break;
+    }
+}
+
+void SSD16XX::writeNewImage()
+{
+    sendCommand(0x24);
+    sendData(buffer, bufferSize);
+}
+
+void SSD16XX::writeOldImage()
+{
+    sendCommand(0x26);
+    sendData(buffer, bufferSize);
+}
+
+void SSD16XX::detachFromUpdate()
+{
+    // To save power / cycles, displays can choose to specify an "expected duration" for various refresh types
+    // If we know a full-refresh takes at least 4 seconds, we can delay polling until 3 seconds have passed
+    // If not implemented, we'll just poll right from the get-go
+    switch (updateType) {
+    default:
+        EInk::beginPolling(100, 0);
+    }
+}
+
+bool SSD16XX::isUpdateDone()
+{
+    // Busy when HIGH
+    if (digitalRead(pin_busy) == HIGH)
+        return false;
+    else
+        return true;
+}
+
+void SSD16XX::finalizeUpdate()
+{
+    // Put a copy of the image into the "old memory".
+    // Used with differential refreshes (e.g. FAST update), to determine which px need to move, and which can remain in place
+    // We need to keep the "old memory" up to date, because don't know whether next refresh will be FULL or FAST etc.
+    if (updateType != FULL) {
+        writeNewImage(); // Only required by some controller variants. Todo: Override just for GDEY0154D678?
+        writeOldImage();
+        sendCommand(0x7F); // Terminate image write without update
+        wait();
+    }
+}
+#endif // MESHTASTIC_INCLUDE_NICHE_GRAPHICS

src/graphics/niche/Drivers/EInk/SSD16XX.h

@@ -0,0 +1,62 @@
+/*
+
+E-Ink base class for displays based on SSD16XX
+
+Most (but not all) SPI E-Ink displays use this family of controller IC.
+Implementing new SSD16XX displays should be fairly painless.
+See DEPG0154BNS800 and DEPG0290BNS800 for examples.
+
+*/
+
+#pragma once
+
+#ifdef MESHTASTIC_INCLUDE_NICHE_GRAPHICS
+
+#include "configuration.h"
+
+#include "./EInk.h"
+
+namespace NicheGraphics::Drivers
+{
+
+class SSD16XX : public EInk
+{
+  public:
+    SSD16XX(uint16_t width, uint16_t height, UpdateTypes supported, uint8_t bufferOffsetX = 0);
+    virtual void begin(SPIClass *spi, uint8_t pin_dc, uint8_t pin_cs, uint8_t pin_busy, uint8_t pin_rst = -1);
+    virtual void update(uint8_t *imageData, UpdateTypes type) override;
+
+  protected:
+    virtual void wait();
+    virtual void reset();
+    virtual void sendCommand(const uint8_t command);
+    virtual void sendData(const uint8_t data);
+    virtual void sendData(const uint8_t *data, uint32_t size);
+    virtual void configFullscreen();     // Select memory region on controller IC
+    virtual void configScanning() {}     // Optional. First & last gates, scan direction, etc
+    virtual void configVoltages() {}     // Optional. Manual panel voltages, soft-start, etc
+    virtual void configWaveform() {}     // Optional. LUT, panel border, temperature sensor, etc
+    virtual void configUpdateSequence(); // Tell controller IC which operations to run
+
+    virtual void writeNewImage();
+    virtual void writeOldImage();
+
+    virtual void detachFromUpdate();
+    virtual bool isUpdateDone() override;
+    virtual void finalizeUpdate() override;
+
+  protected:
+    uint8_t bufferOffsetX; // In bytes. Panel x=0 does not always align with controller x=0. Quirky internal wiring?
+    uint8_t bufferRowSize; // In bytes. Rows store 8 pixels per byte. Rounded up to fit (e.g. 122px would require 16 bytes)
+    uint32_t bufferSize;   // In bytes. Rows * Columns
+    uint8_t *buffer;
+    UpdateTypes updateType;
+
+    uint8_t pin_dc, pin_cs, pin_busy, pin_rst;
+    SPIClass *spi;
+    SPISettings spiSettings = SPISettings(4000000, MSBFIRST, SPI_MODE0);
+};
+
+} // namespace NicheGraphics::Drivers
+
+#endif // MESHTASTIC_INCLUDE_NICHE_GRAPHICS

src/graphics/niche/Drivers/README.md

@@ -0,0 +1,3 @@
+# NicheGraphics - Drivers
+
+Common drivers which can be used by various NicheGrapihcs UIs

src/graphics/niche/FlashData.h

@@ -0,0 +1,140 @@
+#ifdef MESHTASTIC_INCLUDE_NICHE_GRAPHICS
+
+/*
+
+Re-usable NicheGraphics tool
+
+Save settings / data to flash, without use of the Meshtastic Protobufs
+Avoid bloating everyone's protobuf code for our one-off UI implementations
+
+*/
+
+#pragma once
+
+#include "configuration.h"
+
+#include "SafeFile.h"
+
+namespace NicheGraphics
+{
+
+template <typename T> class FlashData
+{
+  private:
+    static std::string getFilename(const char *label)
+    {
+        std::string filename;
+        filename += "/NicheGraphics";
+        filename += "/";
+        filename += label;
+        filename += ".data";
+
+        return filename;
+    }
+
+    static uint32_t getHash(T *data)
+    {
+        uint32_t hash = 0;
+
+        // Sum all bytes of the image buffer together
+        for (uint32_t i = 0; i < sizeof(T); i++)
+            hash ^= ((uint8_t *)data)[i] + 1;
+
+        return hash;
+    }
+
+  public:
+    static bool load(T *data, const char *label)
+    {
+        // Set false if we run into issues
+        bool okay = true;
+
+        // Get a filename based on the label
+        std::string filename = getFilename(label);
+
+#ifdef FSCom
+
+        // Check that the file *does* actually exist
+        if (!FSCom.exists(filename.c_str())) {
+            LOG_WARN("'%s' not found. Using default values", filename.c_str());
+            okay = false;
+            return okay;
+        }
+
+        // Open the file
+        auto f = FSCom.open(filename.c_str(), FILE_O_READ);
+
+        // If opened, start reading
+        if (f) {
+            LOG_INFO("Loading NicheGraphics data '%s'", filename.c_str());
+
+            // Create an object which will received data from flash
+            // We read here first, so we can verify the checksum, without committing to overwriting the *data object
+            // Allows us to retain any defaults that might be set after we declared *data, but before loading settings,
+            // in case the flash values are corrupt
+            T flashData;
+
+            // Read the actual data
+            f.readBytes((char *)&flashData, sizeof(T));
+
+            // Read the hash
+            uint32_t savedHash = 0;
+            f.readBytes((char *)&savedHash, sizeof(savedHash));
+
+            // Calculate hash of the loaded data, then compare with the saved hash
+            // If hash looks good, copy the values to the main data object
+            uint32_t calculatedHash = getHash(&flashData);
+            if (savedHash != calculatedHash) {
+                LOG_WARN("'%s' is corrupt (hash mismatch). Using default values", filename.c_str());
+                okay = false;
+            } else
+                *data = flashData;
+
+            f.close();
+        } else {
+            LOG_ERROR("Could not open / read %s", filename.c_str());
+            okay = false;
+        }
+#else
+        LOG_ERROR("Filesystem not implemented");
+        state = LoadFileState::NO_FILESYSTEM;
+        okay = false;
+#endif
+        return okay;
+    }
+
+    // Save module's custom data (settings?) to flash. Does use protobufs
+    static void save(T *data, const char *label)
+    {
+        // Get a filename based on the label
+        std::string filename = getFilename(label);
+
+#ifdef FSCom
+        FSCom.mkdir("/NicheGraphics");
+
+        auto f = SafeFile(filename.c_str(), true); // "true": full atomic. Write new data to temp file, then rename.
+
+        LOG_INFO("Saving %s", filename.c_str());
+
+        // Calculate a hash of the data
+        uint32_t hash = getHash(data);
+
+        f.write((uint8_t *)data, sizeof(T));     // Write the actualy data
+        f.write((uint8_t *)&hash, sizeof(hash)); // Append the hash
+
+        // f.flush();
+
+        bool writeSucceeded = f.close();
+
+        if (!writeSucceeded) {
+            LOG_ERROR("Can't write data!");
+        }
+#else
+        LOG_ERROR("ERROR: Filesystem not implemented\n");
+#endif
+    }
+};
+
+} // namespace NicheGraphics
+
+#endif

src/graphics/niche/Fonts/FreeSans6pt7b.h

@@ -0,0 +1,129 @@
+#pragma once
+
+const uint8_t FreeSans6pt7bBitmaps[] PROGMEM = {
+    0xAA, 0xA8, 0xC0, 0xF6, 0xA0, 0x24, 0x51, 0xF9, 0x42, 0x9F, 0x92, 0x28, 0x10, 0xE5, 0x55, 0x50, 0xE1, 0x65, 0x55, 0xE1, 0x00,
+    0x71, 0x24, 0x89, 0x22, 0x50, 0x74, 0x02, 0x70, 0xA4, 0x49, 0x11, 0xC0, 0x70, 0x91, 0x23, 0x86, 0x12, 0xA2, 0x4E, 0xF4, 0xE0,
+    0x5A, 0xAA, 0x94, 0x89, 0x12, 0x49, 0x29, 0x00, 0x27, 0x50, 0x21, 0x3E, 0x42, 0x00, 0xE0, 0xC0, 0x80, 0x24, 0xA4, 0xA4, 0x80,
+    0x74, 0xE3, 0x18, 0xC6, 0x33, 0x70, 0x27, 0x92, 0x49, 0x20, 0x79, 0x10, 0x41, 0x08, 0xC6, 0x10, 0xFC, 0x79, 0x30, 0x43, 0x18,
+    0x10, 0x71, 0x78, 0x08, 0x61, 0x8A, 0x49, 0x2F, 0xC2, 0x08, 0x7D, 0x04, 0x1E, 0x44, 0x10, 0x51, 0x78, 0x74, 0x61, 0xE8, 0xC6,
+    0x31, 0x70, 0xF8, 0x44, 0x22, 0x11, 0x08, 0x40, 0x39, 0x34, 0x53, 0x39, 0x1C, 0x51, 0x38, 0x39, 0x3C, 0x71, 0x4C, 0xF0, 0x53,
+    0x78, 0x82, 0x87, 0x01, 0xF1, 0x83, 0x04, 0xF8, 0x3E, 0x07, 0x06, 0x36, 0x40, 0x74, 0x42, 0x11, 0x10, 0x80, 0x20, 0x0F, 0x86,
+    0x19, 0x9A, 0xA4, 0xD9, 0x13, 0x22, 0x56, 0xDA, 0x6E, 0x60, 0x06, 0x00, 0x3C, 0x00, 0x18, 0x18, 0x3C, 0x24, 0x24, 0x7E, 0x42,
+    0x42, 0xC3, 0xFA, 0x18, 0x61, 0xFA, 0x18, 0x61, 0xFC, 0x3E, 0x63, 0x40, 0x40, 0xC0, 0x40, 0x41, 0x63, 0x3E, 0xF9, 0x0A, 0x1C,
+    0x18, 0x30, 0x61, 0xC2, 0xF8, 0xFE, 0x08, 0x20, 0xFE, 0x08, 0x20, 0xFC, 0xFE, 0x08, 0x20, 0xFA, 0x08, 0x20, 0x80, 0x1E, 0x61,
+    0x40, 0x40, 0xC7, 0x41, 0x41, 0x63, 0x1D, 0x83, 0x06, 0x0C, 0x1F, 0xF0, 0x60, 0xC1, 0x82, 0xFF, 0x80, 0x08, 0x42, 0x10, 0x87,
+    0x29, 0x70, 0x85, 0x12, 0x45, 0x0D, 0x13, 0x22, 0x42, 0x86, 0x84, 0x21, 0x08, 0x42, 0x10, 0xF8, 0xC3, 0xC3, 0xC3, 0xA5, 0xA5,
+    0xA5, 0x99, 0x99, 0x99, 0x83, 0x86, 0x8D, 0x19, 0x33, 0x62, 0xC3, 0x86, 0x1E, 0x31, 0x90, 0x68, 0x1C, 0x0A, 0x05, 0x06, 0xC6,
+    0x1E, 0x00, 0xFA, 0x18, 0x61, 0xFA, 0x08, 0x20, 0x80, 0x1E, 0x31, 0x90, 0x68, 0x1C, 0x0A, 0x05, 0x06, 0xC6, 0x1F, 0x00, 0x00,
+    0xFD, 0x0E, 0x1C, 0x2F, 0x90, 0xA1, 0x42, 0x86, 0x7A, 0x18, 0x30, 0x78, 0x38, 0x61, 0x78, 0xFE, 0x20, 0x40, 0x81, 0x02, 0x04,
+    0x08, 0x10, 0x83, 0x06, 0x0C, 0x18, 0x30, 0x60, 0xE2, 0x78, 0xC2, 0x42, 0x42, 0x64, 0x24, 0x24, 0x38, 0x18, 0x18, 0xC4, 0x28,
+    0xCD, 0x29, 0x25, 0x24, 0xA4, 0x52, 0x8C, 0x61, 0x8C, 0x31, 0x80, 0x42, 0x66, 0x24, 0x18, 0x18, 0x18, 0x24, 0x46, 0x42, 0xC3,
+    0x42, 0x24, 0x34, 0x18, 0x08, 0x08, 0x08, 0x08, 0x7E, 0x0C, 0x30, 0x41, 0x06, 0x18, 0x20, 0xFE, 0xEA, 0xAA, 0xAB, 0x92, 0x24,
+    0x89, 0x20, 0xE9, 0x24, 0x92, 0x49, 0x70, 0x46, 0xA9, 0x10, 0xFE, 0x40, 0x79, 0x20, 0x4F, 0xC6, 0x37, 0x40, 0x84, 0x3D, 0x18,
+    0xC6, 0x31, 0xF0, 0x39, 0x3C, 0x20, 0xC1, 0x33, 0x80, 0x04, 0x13, 0xD3, 0xC6, 0x1C, 0x53, 0x3C, 0x39, 0x38, 0x7F, 0x81, 0x13,
+    0x80, 0x6B, 0xA4, 0x92, 0x40, 0x35, 0x3C, 0x61, 0xC5, 0x33, 0x41, 0x4D, 0xE0, 0x84, 0x3D, 0x38, 0xC6, 0x31, 0x88, 0xBF, 0x80,
+    0x45, 0x55, 0x57, 0x84, 0x25, 0x4E, 0x52, 0xD2, 0x88, 0xFF, 0x80, 0xF7, 0x99, 0x91, 0x91, 0x91, 0x91, 0x91, 0xF4, 0x63, 0x18,
+    0xC6, 0x20, 0x39, 0x3C, 0x61, 0xC5, 0x33, 0x80, 0xF4, 0x63, 0x18, 0xC7, 0xD0, 0x80, 0x3D, 0x3C, 0x61, 0xC5, 0x37, 0x41, 0x04,
+    0xF2, 0x49, 0x20, 0x79, 0x24, 0x1C, 0x0B, 0x27, 0x80, 0x5D, 0x24, 0x93, 0x8C, 0x63, 0x18, 0xCF, 0xA0, 0x85, 0x24, 0x92, 0x30,
+    0xC3, 0x00, 0x89, 0x2C, 0x96, 0x4A, 0xA5, 0x61, 0x30, 0x98, 0x49, 0x23, 0x08, 0x31, 0x2C, 0x80, 0x89, 0x24, 0x94, 0x50, 0xC2,
+    0x08, 0x21, 0x00, 0x78, 0x44, 0x46, 0x23, 0xE0, 0x6A, 0xAA, 0xA9, 0xFF, 0xE0, 0x95, 0x55, 0x56, 0x66, 0x60};
+
+const GFXglyph FreeSans6pt7bGlyphs[] PROGMEM = {{0, 0, 0, 3, 0, 1},       // 0x20 ' '
+                                                {0, 2, 9, 4, 1, -8},      // 0x21 '!'
+                                                {3, 4, 3, 4, 0, -8},      // 0x22 '"'
+                                                {5, 7, 8, 7, 0, -7},      // 0x23 '#'
+                                                {12, 6, 11, 7, 0, -9},    // 0x24 '$'
+                                                {21, 10, 9, 11, 0, -8},   // 0x25 '%'
+                                                {33, 7, 9, 8, 1, -8},     // 0x26 '&'
+                                                {41, 1, 3, 2, 1, -8},     // 0x27 '''
+                                                {42, 2, 11, 4, 1, -8},    // 0x28 '('
+                                                {45, 3, 11, 4, 0, -8},    // 0x29 ')'
+                                                {50, 4, 3, 5, 0, -8},     // 0x2A '*'
+                                                {52, 5, 5, 7, 1, -4},     // 0x2B '+'
+                                                {56, 1, 3, 3, 1, 0},      // 0x2C ','
+                                                {57, 2, 1, 4, 1, -3},     // 0x2D '-'
+                                                {58, 1, 1, 3, 1, 0},      // 0x2E '.'
+                                                {59, 3, 9, 3, 0, -8},     // 0x2F '/'
+                                                {63, 5, 9, 7, 1, -8},     // 0x30 '0'
+                                                {69, 3, 9, 7, 1, -8},     // 0x31 '1'
+                                                {73, 6, 9, 7, 0, -8},     // 0x32 '2'
+                                                {80, 6, 9, 7, 0, -8},     // 0x33 '3'
+                                                {87, 6, 9, 7, 0, -8},     // 0x34 '4'
+                                                {94, 6, 9, 7, 0, -8},     // 0x35 '5'
+                                                {101, 5, 9, 7, 1, -8},    // 0x36 '6'
+                                                {107, 5, 9, 7, 1, -8},    // 0x37 '7'
+                                                {113, 6, 9, 7, 0, -8},    // 0x38 '8'
+                                                {120, 6, 9, 7, 0, -8},    // 0x39 '9'
+                                                {127, 1, 7, 3, 1, -6},    // 0x3A ':'
+                                                {128, 1, 8, 3, 1, -5},    // 0x3B ';'
+                                                {129, 5, 6, 7, 1, -5},    // 0x3C '<'
+                                                {133, 5, 3, 7, 1, -3},    // 0x3D '='
+                                                {135, 5, 6, 7, 1, -5},    // 0x3E '>'
+                                                {139, 5, 9, 7, 1, -8},    // 0x3F '?'
+                                                {145, 11, 11, 12, 0, -8}, // 0x40 '@'
+                                                {161, 8, 9, 8, 0, -8},    // 0x41 'A'
+                                                {170, 6, 9, 8, 1, -8},    // 0x42 'B'
+                                                {177, 8, 9, 9, 0, -8},    // 0x43 'C'
+                                                {186, 7, 9, 8, 1, -8},    // 0x44 'D'
+                                                {194, 6, 9, 8, 1, -8},    // 0x45 'E'
+                                                {201, 6, 9, 7, 1, -8},    // 0x46 'F'
+                                                {208, 8, 9, 9, 0, -8},    // 0x47 'G'
+                                                {217, 7, 9, 9, 1, -8},    // 0x48 'H'
+                                                {225, 1, 9, 3, 1, -8},    // 0x49 'I'
+                                                {227, 5, 9, 6, 0, -8},    // 0x4A 'J'
+                                                {233, 7, 9, 8, 1, -8},    // 0x4B 'K'
+                                                {241, 5, 9, 7, 1, -8},    // 0x4C 'L'
+                                                {247, 8, 9, 10, 1, -8},   // 0x4D 'M'
+                                                {256, 7, 9, 9, 1, -8},    // 0x4E 'N'
+                                                {264, 9, 9, 9, 0, -8},    // 0x4F 'O'
+                                                {275, 6, 9, 8, 1, -8},    // 0x50 'P'
+                                                {282, 9, 10, 9, 0, -8},   // 0x51 'Q'
+                                                {294, 7, 9, 9, 1, -8},    // 0x52 'R'
+                                                {302, 6, 9, 8, 1, -8},    // 0x53 'S'
+                                                {309, 7, 9, 8, 0, -8},    // 0x54 'T'
+                                                {317, 7, 9, 9, 1, -8},    // 0x55 'U'
+                                                {325, 8, 9, 8, 0, -8},    // 0x56 'V'
+                                                {334, 11, 9, 11, 0, -8},  // 0x57 'W'
+                                                {347, 8, 9, 8, 0, -8},    // 0x58 'X'
+                                                {356, 8, 9, 8, 0, -8},    // 0x59 'Y'
+                                                {365, 7, 9, 7, 0, -8},    // 0x5A 'Z'
+                                                {373, 2, 12, 3, 1, -8},   // 0x5B '['
+                                                {376, 3, 9, 3, 0, -8},    // 0x5C '\'
+                                                {380, 3, 12, 3, 0, -8},   // 0x5D ']'
+                                                {385, 4, 5, 6, 1, -8},    // 0x5E '^'
+                                                {388, 7, 1, 7, 0, 2},     // 0x5F '_'
+                                                {389, 3, 1, 3, 0, -8},    // 0x60 '`'
+                                                {390, 6, 7, 7, 0, -6},    // 0x61 'a'
+                                                {396, 5, 9, 7, 1, -8},    // 0x62 'b'
+                                                {402, 6, 7, 6, 0, -6},    // 0x63 'c'
+                                                {408, 6, 9, 7, 0, -8},    // 0x64 'd'
+                                                {415, 6, 7, 6, 0, -6},    // 0x65 'e'
+                                                {421, 3, 9, 3, 0, -8},    // 0x66 'f'
+                                                {425, 6, 10, 7, 0, -6},   // 0x67 'g'
+                                                {433, 5, 9, 6, 1, -8},    // 0x68 'h'
+                                                {439, 1, 9, 3, 1, -8},    // 0x69 'i'
+                                                {441, 2, 12, 3, 0, -8},   // 0x6A 'j'
+                                                {444, 5, 9, 6, 1, -8},    // 0x6B 'k'
+                                                {450, 1, 9, 3, 1, -8},    // 0x6C 'l'
+                                                {452, 8, 7, 10, 1, -6},   // 0x6D 'm'
+                                                {459, 5, 7, 6, 1, -6},    // 0x6E 'n'
+                                                {464, 6, 7, 6, 0, -6},    // 0x6F 'o'
+                                                {470, 5, 9, 7, 1, -6},    // 0x70 'p'
+                                                {476, 6, 9, 7, 0, -6},    // 0x71 'q'
+                                                {483, 3, 7, 4, 1, -6},    // 0x72 'r'
+                                                {486, 6, 7, 6, 0, -6},    // 0x73 's'
+                                                {492, 3, 8, 3, 0, -7},    // 0x74 't'
+                                                {495, 5, 7, 6, 1, -6},    // 0x75 'u'
+                                                {500, 6, 7, 6, 0, -6},    // 0x76 'v'
+                                                {506, 9, 7, 9, 0, -6},    // 0x77 'w'
+                                                {514, 6, 7, 6, 0, -6},    // 0x78 'x'
+                                                {520, 6, 10, 6, 0, -6},   // 0x79 'y'
+                                                {528, 5, 7, 6, 0, -6},    // 0x7A 'z'
+                                                {533, 2, 12, 4, 1, -8},   // 0x7B '{'
+                                                {536, 1, 11, 3, 1, -8},   // 0x7C '|'
+                                                {538, 2, 12, 4, 1, -8},   // 0x7D '}'
+                                                {541, 6, 2, 6, 0, -4}};   // 0x7E '~'
+
+const GFXfont FreeSans6pt7b PROGMEM = {(uint8_t *)FreeSans6pt7bBitmaps, (GFXglyph *)FreeSans6pt7bGlyphs, 0x20, 0x7E, 14};
+
+// Approx. 1215 bytes

src/graphics/niche/Fonts/FreeSans6pt8bCyrillic.h

@@ -0,0 +1,302 @@
+/*
+
+Uses Windows-1251 encoding to map translingual Cyrillic characters to range between (uint8_t)127 and (uint8_t)255
+https://en.wikipedia.org/wiki/Windows-1251
+
+Cyrillic characters present to the firmware as UTF8.
+A Niche Graphics implementation needs to identify these, and subsitute the appropriate Windows-1251 char value.
+
+*/
+
+#pragma once
+
+const uint8_t FreeSans6pt8bCyrillicBitmaps[] PROGMEM = {
+    0xFF, 0xA0, 0xC0, 0xFF, 0xA0, 0xC0, 0xB6, 0x80, 0x24, 0x51, 0xF9, 0x42, 0x9F, 0x92, 0x28, 0x31, 0x75, 0x54, 0x78, 0x79, 0x75,
+    0x7C, 0x41, 0x00, 0x01, 0x1C, 0x49, 0x22, 0x50, 0x74, 0x02, 0x60, 0xA4, 0x49, 0x11, 0xC0, 0x21, 0x44, 0x94, 0x62, 0x59, 0xE2,
+    0xF4, 0xE0, 0x6A, 0xAA, 0x90, 0x48, 0x92, 0x49, 0x4A, 0x00, 0x5D, 0x40, 0x21, 0x09, 0xF2, 0x10, 0xE0, 0xC0, 0x80, 0x25, 0x25,
+    0x24, 0x26, 0xA3, 0x18, 0xC6, 0x31, 0xF0, 0x27, 0x92, 0x49, 0x20, 0x11, 0xB4, 0x41, 0x0C, 0xC6, 0x10, 0xFC, 0x26, 0xA2, 0x13,
+    0x04, 0x31, 0xF0, 0x08, 0x61, 0x8A, 0x49, 0x2F, 0xC2, 0x08, 0xFF, 0xE1, 0x4D, 0x84, 0x31, 0xF0, 0x26, 0xE3, 0x0F, 0x46, 0x31,
+    0xF0, 0xFF, 0xC4, 0x22, 0x11, 0x08, 0x40, 0x11, 0xA4, 0x51, 0x39, 0x1C, 0x51, 0x78, 0x11, 0xA4, 0x71, 0x45, 0xF0, 0x51, 0x78,
+    0xC0, 0x30, 0xC0, 0x36, 0x1F, 0x20, 0xE0, 0x80, 0xF8, 0x3E, 0xC1, 0xC2, 0xE8, 0x00, 0x74, 0x62, 0x11, 0x10, 0x80, 0x20, 0x0F,
+    0x06, 0x18, 0x81, 0xA7, 0xD4, 0x93, 0x22, 0x64, 0x4A, 0x7E, 0x60, 0x06, 0x00, 0x3C, 0x00, 0x18, 0x18, 0x1C, 0x24, 0x24, 0x7E,
+    0x42, 0x42, 0xC3, 0xFA, 0x38, 0x61, 0xFA, 0x18, 0x61, 0xFC, 0x38, 0x8A, 0x0C, 0x08, 0x10, 0x20, 0xE3, 0x7C, 0xF9, 0x1A, 0x1C,
+    0x18, 0x30, 0x60, 0xC2, 0xF8, 0xFE, 0x08, 0x20, 0xFE, 0x08, 0x20, 0xFC, 0xFE, 0x08, 0x20, 0xFA, 0x08, 0x20, 0x80, 0x3C, 0x46,
+    0x82, 0x80, 0x8F, 0x81, 0x83, 0xC3, 0x7D, 0x83, 0x06, 0x0C, 0x1F, 0xF0, 0x60, 0xC1, 0x82, 0xFF, 0x80, 0x08, 0x42, 0x10, 0x86,
+    0x31, 0x78, 0x87, 0x1A, 0x65, 0x8F, 0x1A, 0x22, 0x42, 0x86, 0x84, 0x21, 0x08, 0x42, 0x10, 0xF8, 0xC3, 0xC3, 0xC3, 0xA5, 0xA5,
+    0xA5, 0x99, 0x99, 0x99, 0x83, 0x87, 0x8D, 0x19, 0x32, 0x62, 0xC3, 0x86, 0x1E, 0x11, 0x90, 0x48, 0x1C, 0x0A, 0x05, 0x06, 0xC2,
+    0x3E, 0x00, 0xFA, 0x18, 0x61, 0xFE, 0x08, 0x20, 0x80, 0x1E, 0x11, 0x90, 0x48, 0x1C, 0x0A, 0x05, 0x06, 0xC6, 0x3F, 0x00, 0xFD,
+    0x0E, 0x0C, 0x1F, 0xD0, 0xA0, 0xC1, 0x82, 0x7A, 0x18, 0x70, 0x78, 0x38, 0x61, 0x7C, 0xFE, 0x20, 0x40, 0x81, 0x02, 0x04, 0x08,
+    0x10, 0x83, 0x06, 0x0C, 0x18, 0x30, 0x60, 0xC3, 0x7C, 0xC3, 0x42, 0x42, 0x26, 0x24, 0x24, 0x14, 0x18, 0x18, 0xC4, 0x28, 0xC5,
+    0x39, 0xA5, 0x24, 0xA4, 0x52, 0x8C, 0x71, 0x8C, 0x30, 0x80, 0x87, 0x34, 0x8C, 0x30, 0xC4, 0xB3, 0x84, 0xC3, 0x42, 0x26, 0x24,
+    0x18, 0x18, 0x08, 0x08, 0x08, 0x7E, 0x0C, 0x10, 0x41, 0x06, 0x08, 0x20, 0xFE, 0xEA, 0xAA, 0xAB, 0x92, 0x24, 0x89, 0x20, 0xED,
+    0xB6, 0xDB, 0x6D, 0xF0, 0x46, 0xAA, 0x90, 0xFC, 0x90, 0xFC, 0x4F, 0x98, 0xFC, 0x84, 0x21, 0xF8, 0xC6, 0x31, 0xF0, 0x79, 0x18,
+    0x20, 0x45, 0xE0, 0x04, 0x10, 0x5F, 0xC6, 0x18, 0x51, 0x7C, 0xFC, 0x7F, 0x08, 0xF8, 0x29, 0x74, 0x92, 0x40, 0x7D, 0x18, 0x61,
+    0x45, 0xF0, 0x52, 0x30, 0x84, 0x21, 0xF8, 0xC6, 0x31, 0x88, 0xDF, 0x80, 0x51, 0x55, 0x56, 0x84, 0x21, 0x2A, 0x72, 0x92, 0x98,
+    0xFF, 0x80, 0xFF, 0x99, 0x99, 0x99, 0x99, 0x99, 0xFC, 0x63, 0x18, 0xC4, 0x79, 0x18, 0x71, 0x45, 0xE0, 0xFC, 0x63, 0x18, 0xFA,
+    0x10, 0x80, 0x7D, 0x18, 0x61, 0x45, 0xF0, 0x41, 0x04, 0xF2, 0x49, 0x00, 0x79, 0x07, 0x02, 0xCD, 0xE0, 0x4B, 0xA4, 0x93, 0x8C,
+    0x63, 0x18, 0xFC, 0xCD, 0x24, 0x94, 0x30, 0xC0, 0x99, 0x59, 0x55, 0x56, 0x66, 0x26, 0x96, 0x66, 0x99, 0xCA, 0x52, 0x63, 0x18,
+    0x84, 0x40, 0x78, 0xC4, 0x44, 0x7C, 0x6A, 0xAA, 0xA9, 0xFF, 0xF0, 0xC9, 0x24, 0x4A, 0x49, 0x40, 0xE8, 0xC0, 0xFE, 0x18, 0x61,
+    0x86, 0x18, 0x61, 0xFC, 0xFC, 0x08, 0x04, 0x02, 0x01, 0xF0, 0x8C, 0x46, 0x23, 0x11, 0x80, 0xC0, 0xC0, 0x10, 0x8F, 0xE0, 0x82,
+    0x08, 0x20, 0x82, 0x08, 0x00, 0x64, 0x0F, 0x88, 0x88, 0x80, 0x3D, 0x0C, 0x2E, 0xF9, 0x04, 0x0F, 0x7C, 0x08, 0x81, 0x10, 0x22,
+    0x04, 0x7C, 0x88, 0x51, 0x0A, 0x21, 0x87, 0xC0, 0x84, 0x10, 0x82, 0x10, 0x42, 0x0F, 0xFD, 0x08, 0xA1, 0x0C, 0x23, 0x87, 0xC0,
+    0x10, 0x88, 0xE6, 0xB3, 0x8C, 0x28, 0x92, 0x28, 0xC0, 0xFC, 0x08, 0x04, 0x02, 0x01, 0xF0, 0x8C, 0x46, 0x23, 0x11, 0x80, 0x83,
+    0x06, 0x0C, 0x18, 0x30, 0x60, 0xC1, 0xFE, 0x20, 0x40, 0x43, 0xC4, 0x1F, 0x45, 0x14, 0x51, 0x44, 0x11, 0x80, 0x78, 0x24, 0x13,
+    0xC9, 0x14, 0x8E, 0x7C, 0x88, 0x44, 0x3F, 0xD1, 0x38, 0x8C, 0x78, 0x60, 0x9A, 0xCC, 0xA9, 0x43, 0xC4, 0x1F, 0x45, 0x14, 0x51,
+    0x44, 0x8C, 0x63, 0x18, 0xFC, 0x80, 0x24, 0x33, 0x0A, 0x36, 0x45, 0x8E, 0x0C, 0x10, 0x60, 0x80, 0x70, 0x22, 0x95, 0xA8, 0xC4,
+    0x23, 0x10, 0x08, 0x42, 0x10, 0x86, 0x31, 0x78, 0x07, 0xF8, 0x20, 0x82, 0x08, 0x20, 0x82, 0x00, 0x28, 0x0F, 0xE0, 0x82, 0x0F,
+    0xE0, 0x82, 0x0F, 0xC0, 0x38, 0x8A, 0x0C, 0x0F, 0x90, 0x20, 0xE3, 0x7C, 0x51, 0x55, 0x56, 0xA1, 0x24, 0x92, 0x49, 0x00, 0xFF,
+    0x80, 0xDF, 0x80, 0x27, 0xC9, 0x24, 0x8A, 0x28, 0xA2, 0x8B, 0xF8, 0x20, 0x80, 0x28, 0xA0, 0x1E, 0x47, 0xFC, 0x11, 0x78, 0x88,
+    0x44, 0x32, 0x59, 0xDA, 0xCD, 0x66, 0x6B, 0x32, 0x89, 0x80, 0x79, 0x1F, 0x30, 0x45, 0xE0, 0x7A, 0x18, 0x70, 0x78, 0x38, 0x61,
+    0x7C, 0x79, 0x07, 0x02, 0xCD, 0xE0, 0xB4, 0x24, 0x92, 0x40, 0x18, 0x18, 0x3C, 0x24, 0x24, 0x7E, 0x42, 0x42, 0xC3, 0xFE, 0x08,
+    0x20, 0xFE, 0x18, 0x61, 0xFC, 0xFA, 0x38, 0x61, 0xFA, 0x18, 0x61, 0xFC, 0xFE, 0x08, 0x20, 0x82, 0x08, 0x20, 0x80, 0x1F, 0x08,
+    0x84, 0x42, 0x21, 0x10, 0x88, 0x44, 0x42, 0xFF, 0xC0, 0x60, 0x20, 0xFE, 0x08, 0x20, 0xFE, 0x08, 0x20, 0xFC, 0x88, 0xA4, 0x9A,
+    0x87, 0xC1, 0xC1, 0xF1, 0xAD, 0x92, 0x88, 0x80, 0x7A, 0x18, 0x41, 0x38, 0x18, 0x61, 0x7C, 0x87, 0x0E, 0x2C, 0x59, 0x34, 0x68,
+    0xE1, 0xC2, 0x28, 0x22, 0x1C, 0x38, 0xB1, 0x64, 0xD1, 0xA3, 0x87, 0x08, 0x8E, 0x6B, 0x38, 0xC2, 0x89, 0x22, 0x8C, 0x3E, 0x44,
+    0x89, 0x12, 0x24, 0x58, 0xA1, 0xC2, 0xC3, 0xC3, 0xC3, 0xA5, 0xA5, 0xA5, 0x99, 0x99, 0x99, 0x83, 0x06, 0x0C, 0x1F, 0xF0, 0x60,
+    0xC1, 0x82, 0x3C, 0x46, 0x83, 0x81, 0x81, 0x81, 0x81, 0xC2, 0x7C, 0xFF, 0x06, 0x0C, 0x18, 0x30, 0x60, 0xC1, 0x82, 0xFA, 0x18,
+    0x61, 0xFE, 0x08, 0x20, 0x80, 0x38, 0x8A, 0x0C, 0x08, 0x10, 0x20, 0xE3, 0x7C, 0xFE, 0x20, 0x40, 0x81, 0x02, 0x04, 0x08, 0x10,
+    0xC2, 0x8D, 0x91, 0x63, 0x83, 0x04, 0x18, 0x20, 0x08, 0x1E, 0x32, 0xD1, 0x38, 0x8C, 0x4F, 0x2C, 0xFC, 0x08, 0x00, 0x87, 0x34,
+    0x8C, 0x30, 0xC4, 0xB3, 0x84, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0xFF, 0x01, 0x01, 0x8E, 0x38, 0xE3, 0x8D, 0xF0,
+    0xC3, 0x0C, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0xFF, 0x99, 0x4C, 0xA6, 0x53, 0x29, 0x94, 0xCA, 0x65, 0x32, 0xFF,
+    0x80, 0x40, 0x20, 0xF0, 0x04, 0x01, 0x00, 0x40, 0x1F, 0x84, 0x21, 0x0C, 0x42, 0x1F, 0x00, 0x81, 0xC0, 0xE0, 0x70, 0x3F, 0xDC,
+    0x2E, 0x17, 0x0B, 0xF9, 0x80, 0x82, 0x08, 0x20, 0xFE, 0x18, 0x61, 0xF8, 0x79, 0x8A, 0x18, 0x13, 0xE0, 0x60, 0xC2, 0x7C, 0x87,
+    0x26, 0x39, 0x06, 0x41, 0xF0, 0x64, 0x19, 0x06, 0x63, 0x8F, 0x80, 0x7E, 0x18, 0x61, 0x7C, 0xD6, 0x71, 0x84, 0x79, 0x11, 0xD9,
+    0xCD, 0xD0, 0x0D, 0xC4, 0x1E, 0x47, 0x1C, 0x51, 0x78, 0xF4, 0xBD, 0x29, 0xF8, 0xF8, 0x88, 0x88, 0x3C, 0x48, 0x91, 0x22, 0x5F,
+    0xE0, 0x80, 0x79, 0x1F, 0xF0, 0x45, 0xE0, 0x92, 0x54, 0x38, 0x3C, 0x56, 0x93, 0x78, 0x23, 0x82, 0xCD, 0xE0, 0x9C, 0xEB, 0x5C,
+    0xC4, 0x70, 0x27, 0x3A, 0xD7, 0x31, 0x9A, 0xCC, 0xA9, 0x7A, 0x52, 0x94, 0xE4, 0x8F, 0x3D, 0x6D, 0xA6, 0x90, 0x8C, 0x7F, 0x18,
+    0xC4, 0x79, 0x1C, 0x71, 0x45, 0xE0, 0xFC, 0x63, 0x18, 0xC4, 0xFC, 0x63, 0x18, 0xFA, 0x10, 0x80, 0x79, 0x1C, 0x30, 0x45, 0xE0,
+    0xF9, 0x08, 0x42, 0x10, 0x8A, 0x56, 0xA3, 0x10, 0x8C, 0x40, 0x04, 0x01, 0x07, 0xF9, 0x31, 0xC4, 0x71, 0x14, 0xC5, 0xFE, 0x04,
+    0x01, 0x00, 0x40, 0x4B, 0x8C, 0x65, 0xE4, 0x8A, 0x28, 0xA2, 0x8B, 0xF0, 0x40, 0x99, 0x97, 0x11, 0x96, 0x59, 0x65, 0x97, 0xF0,
+    0x95, 0x2A, 0x54, 0xA9, 0x5F, 0xC0, 0x80, 0xF0, 0x20, 0x78, 0x91, 0x23, 0xC0, 0x86, 0x1F, 0x63, 0x8F, 0xD0, 0x84, 0x3D, 0x18,
+    0xF8, 0xF4, 0xDE, 0x19, 0xF8, 0x9E, 0xA2, 0xE1, 0xA1, 0xA2, 0x9E, 0xFC, 0x7E, 0xD4, 0xC4,
+};
+
+const GFXglyph FreeSans6pt8bCyrillicGlyphs[] PROGMEM = {
+    {0, 0, 0, 3, 0, 0},        // 0x20 ' '
+    {3, 2, 9, 3, 1, -8},       // 0x21 '!'
+    {6, 3, 3, 4, 1, -8},       // 0x22 '"'
+    {8, 7, 8, 7, 0, -7},       // 0x23 '#'
+    {15, 6, 11, 7, 0, -8},     // 0x24 '$'
+    {24, 10, 9, 11, 0, -8},    // 0x25 '%'
+    {36, 6, 9, 8, 1, -8},      // 0x26 '&'
+    {43, 1, 3, 2, 1, -8},      // 0x27 '''
+    {44, 2, 10, 4, 1, -7},     // 0x28 '('
+    {47, 3, 11, 4, 0, -7},     // 0x29 ')'
+    {52, 3, 4, 5, 1, -8},      // 0x2A '*'
+    {54, 5, 6, 7, 1, -5},      // 0x2B '+'
+    {58, 1, 3, 3, 1, 0},       // 0x2C ','
+    {59, 2, 1, 4, 1, -3},      // 0x2D '-'
+    {60, 1, 1, 3, 1, 0},       // 0x2E '.'
+    {61, 3, 8, 3, 0, -7},      // 0x2F '/'
+    {64, 5, 9, 7, 1, -8},      // 0x30 '0'
+    {70, 3, 9, 7, 1, -8},      // 0x31 '1'
+    {74, 6, 9, 7, 0, -8},      // 0x32 '2'
+    {81, 5, 9, 7, 1, -8},      // 0x33 '3'
+    {87, 6, 9, 7, 0, -8},      // 0x34 '4'
+    {94, 5, 9, 7, 1, -8},      // 0x35 '5'
+    {100, 5, 9, 7, 1, -8},     // 0x36 '6'
+    {106, 5, 9, 7, 1, -8},     // 0x37 '7'
+    {112, 6, 9, 7, 0, -8},     // 0x38 '8'
+    {119, 6, 9, 7, 0, -8},     // 0x39 '9'
+    {126, 2, 6, 3, 1, -5},     // 0x3A ':'
+    {128, 2, 8, 3, 1, -5},     // 0x3B ';'
+    {130, 5, 5, 7, 1, -4},     // 0x3C '<'
+    {134, 5, 3, 7, 1, -3},     // 0x3D '='
+    {136, 5, 5, 7, 1, -4},     // 0x3E '>'
+    {140, 5, 9, 7, 1, -8},     // 0x3F '?'
+    {146, 11, 11, 12, 0, -8},  // 0x40 '@'
+    {162, 8, 9, 8, 0, -8},     // 0x41 'A'
+    {171, 6, 9, 8, 1, -8},     // 0x42 'B'
+    {178, 7, 9, 9, 1, -8},     // 0x43 'C'
+    {186, 7, 9, 9, 1, -8},     // 0x44 'D'
+    {194, 6, 9, 8, 1, -8},     // 0x45 'E'
+    {201, 6, 9, 7, 1, -8},     // 0x46 'F'
+    {208, 8, 9, 9, 1, -8},     // 0x47 'G'
+    {217, 7, 9, 9, 1, -8},     // 0x48 'H'
+    {225, 1, 9, 3, 1, -8},     // 0x49 'I'
+    {227, 5, 9, 6, 0, -8},     // 0x4A 'J'
+    {233, 7, 9, 8, 1, -8},     // 0x4B 'K'
+    {241, 5, 9, 7, 1, -8},     // 0x4C 'L'
+    {247, 8, 9, 10, 1, -8},    // 0x4D 'M'
+    {256, 7, 9, 9, 1, -8},     // 0x4E 'N'
+    {264, 9, 9, 9, 0, -8},     // 0x4F 'O'
+    {275, 6, 9, 8, 1, -8},     // 0x50 'P'
+    {282, 9, 9, 9, 0, -8},     // 0x51 'Q'
+    {293, 7, 9, 9, 1, -8},     // 0x52 'R'
+    {301, 6, 9, 8, 1, -8},     // 0x53 'S'
+    {308, 7, 9, 7, 0, -8},     // 0x54 'T'
+    {316, 7, 9, 9, 1, -8},     // 0x55 'U'
+    {324, 8, 9, 8, 0, -8},     // 0x56 'V'
+    {333, 11, 9, 11, 0, -8},   // 0x57 'W'
+    {346, 6, 9, 8, 1, -8},     // 0x58 'X'
+    {353, 8, 9, 8, 0, -8},     // 0x59 'Y'
+    {362, 7, 9, 7, 0, -8},     // 0x5A 'Z'
+    {370, 2, 12, 3, 1, -8},    // 0x5B '['
+    {373, 3, 9, 3, 0, -8},     // 0x5C '\'
+    {377, 3, 12, 3, 0, -8},    // 0x5D ']'
+    {382, 4, 5, 6, 1, -8},     // 0x5E '^'
+    {385, 6, 1, 7, 0, 2},      // 0x5F '_'
+    {386, 2, 2, 4, 1, -8},     // 0x60 '`'
+    {387, 5, 6, 7, 1, -5},     // 0x61 'a'
+    {391, 5, 9, 7, 1, -8},     // 0x62 'b'
+    {397, 6, 6, 6, 0, -5},     // 0x63 'c'
+    {402, 6, 9, 7, 0, -8},     // 0x64 'd'
+    {409, 5, 6, 7, 1, -5},     // 0x65 'e'
+    {413, 3, 9, 3, 0, -8},     // 0x66 'f'
+    {417, 6, 9, 7, 0, -5},     // 0x67 'g'
+    {424, 5, 9, 7, 1, -8},     // 0x68 'h'
+    {430, 1, 9, 3, 1, -8},     // 0x69 'i'
+    {432, 2, 12, 3, 0, -8},    // 0x6A 'j'
+    {435, 5, 9, 6, 1, -8},     // 0x6B 'k'
+    {441, 1, 9, 3, 1, -8},     // 0x6C 'l'
+    {443, 8, 6, 10, 1, -5},    // 0x6D 'm'
+    {449, 5, 6, 7, 1, -5},     // 0x6E 'n'
+    {453, 6, 6, 7, 0, -5},     // 0x6F 'o'
+    {458, 5, 9, 7, 1, -5},     // 0x70 'p'
+    {464, 6, 9, 7, 0, -5},     // 0x71 'q'
+    {471, 3, 6, 4, 1, -5},     // 0x72 'r'
+    {474, 6, 6, 6, 0, -5},     // 0x73 's'
+    {479, 3, 8, 3, 0, -7},     // 0x74 't'
+    {482, 5, 6, 7, 1, -5},     // 0x75 'u'
+    {486, 6, 6, 6, 0, -5},     // 0x76 'v'
+    {491, 8, 6, 9, 0, -5},     // 0x77 'w'
+    {497, 4, 6, 6, 1, -5},     // 0x78 'x'
+    {500, 5, 9, 6, 0, -5},     // 0x79 'y'
+    {506, 5, 6, 6, 0, -5},     // 0x7A 'z'
+    {510, 2, 12, 4, 1, -8},    // 0x7B '{'
+    {513, 1, 12, 3, 1, -8},    // 0x7C '|'
+    {515, 3, 12, 4, 0, -8},    // 0x7D '}'
+    {520, 5, 2, 7, 1, -4},     // 0x7E '~'
+    {522, 6, 9, 8, 1, -8},     //
+    {529, 9, 11, 9, 0, -8},    //
+    {542, 6, 11, 7, 1, -10},   //
+    {551, 0, 0, 8, 0, 0},      //
+    {551, 4, 9, 5, 1, -8},     //
+    {556, 0, 0, 8, 0, 0},      //
+    {556, 0, 0, 8, 0, 0},      //
+    {556, 0, 0, 8, 0, 0},      //
+    {556, 0, 0, 8, 0, 0},      //
+    {556, 6, 8, 8, 1, -7},     //
+    {562, 0, 0, 8, 0, 0},      //
+    {562, 11, 9, 13, 1, -8},   //
+    {575, 0, 0, 8, 0, 0},      //
+    {575, 11, 9, 12, 1, -8},   //
+    {588, 6, 11, 8, 1, -10},   //
+    {597, 9, 9, 9, 0, -8},     //
+    {608, 7, 11, 9, 1, -8},    //
+    {618, 6, 11, 7, 0, -8},    //
+    {627, 0, 0, 8, 0, 0},      //
+    {627, 0, 0, 8, 0, 0},      //
+    {627, 0, 0, 8, 0, 0},      //
+    {627, 0, 0, 8, 0, 0},      //
+    {627, 0, 0, 8, 0, 0},      //
+    {627, 0, 0, 8, 0, 0},      //
+    {627, 0, 0, 8, 0, 0},      //
+    {627, 0, 0, 8, 0, 0},      //
+    {627, 0, 0, 8, 0, 0},      //
+    {627, 9, 6, 10, 0, -5},    //
+    {634, 0, 0, 8, 0, 0},      //
+    {634, 9, 6, 10, 1, -5},    //
+    {641, 4, 8, 6, 1, -7},     //
+    {645, 6, 9, 7, 0, -8},     //
+    {652, 5, 7, 7, 1, -5},     //
+    {657, 0, 0, 8, 0, 0},      //
+    {657, 7, 11, 7, 0, -10},   //
+    {667, 5, 11, 6, 0, -7},    //
+    {674, 5, 9, 6, 0, -8},     //
+    {680, 0, 0, 8, 0, 0},      //
+    {680, 6, 10, 7, 1, -9},    //
+    {688, 0, 0, 8, 0, 0},      //
+    {688, 0, 0, 8, 0, 0},      //
+    {688, 6, 11, 8, 1, -10},   //
+    {697, 7, 9, 9, 1, -8},     //
+    {705, 0, 0, 8, 0, 0},      //
+    {705, 0, 0, 8, 0, 0},      //
+    {705, 2, 12, 3, 0, -8},    //
+    {708, 0, 0, 8, 0, 0},      //
+    {708, 0, 0, 8, 0, 0},      //
+    {708, 3, 11, 3, 0, -10},   //
+    {713, 0, 0, 8, 0, 0},      //
+    {713, 0, 0, 8, 0, 0},      //
+    {713, 1, 9, 3, 1, -8},     //
+    {715, 1, 9, 3, 1, -8},     //
+    {717, 3, 8, 5, 1, -7},     //
+    {720, 6, 9, 7, 1, -5},     //
+    {727, 0, 0, 8, 0, 0},      //
+    {727, 0, 0, 8, 0, 0},      //
+    {727, 6, 9, 7, 0, -8},     //
+    {734, 9, 9, 11, 1, -8},    //
+    {745, 6, 6, 6, 0, -5},     //
+    {750, 0, 0, 8, 0, 0},      //
+    {750, 0, 0, 8, 0, 0},      //
+    {750, 6, 9, 8, 1, -8},     //
+    {757, 6, 6, 6, 0, -5},     //
+    {762, 3, 9, 3, 0, -8},     //
+    {766, 8, 9, 8, 0, -8},     //
+    {775, 6, 9, 8, 1, -8},     //
+    {782, 6, 9, 8, 1, -8},     //
+    {789, 6, 9, 7, 1, -8},     //
+    {796, 9, 11, 10, 0, -8},   //
+    {809, 6, 9, 8, 1, -8},     //
+    {816, 9, 9, 11, 1, -8},    //
+    {827, 6, 9, 8, 1, -8},     //
+    {834, 7, 9, 9, 1, -8},     //
+    {842, 7, 11, 9, 1, -10},   //
+    {852, 6, 9, 8, 1, -8},     //
+    {859, 7, 9, 8, 0, -8},     //
+    {867, 8, 9, 10, 1, -8},    //
+    {876, 7, 9, 9, 1, -8},     //
+    {884, 8, 9, 10, 1, -8},    //
+    {893, 7, 9, 9, 1, -8},     //
+    {901, 6, 9, 8, 1, -8},     //
+    {908, 7, 9, 9, 1, -8},     //
+    {916, 7, 9, 7, 0, -8},     //
+    {924, 7, 9, 7, 0, -8},     //
+    {932, 9, 9, 10, 1, -8},    //
+    {943, 6, 9, 8, 1, -8},     //
+    {950, 8, 11, 9, 1, -8},    //
+    {961, 6, 9, 8, 1, -8},     //
+    {968, 8, 9, 10, 1, -8},    //
+    {977, 9, 11, 10, 1, -8},   //
+    {990, 10, 9, 10, 0, -8},   //
+    {1002, 9, 9, 10, 1, -8},   //
+    {1013, 6, 9, 8, 1, -8},    //
+    {1020, 7, 9, 9, 1, -8},    //
+    {1028, 10, 9, 12, 1, -8},  //
+    {1040, 6, 9, 8, 1, -8},    //
+    {1047, 6, 6, 7, 0, -5},    //
+    {1052, 6, 9, 7, 0, -8},    //
+    {1059, 5, 6, 6, 1, -5},    //
+    {1063, 4, 6, 5, 1, -5},    //
+    {1066, 7, 7, 7, 0, -5},    //
+    {1073, 6, 6, 7, 0, -5},    //
+    {1078, 8, 6, 9, 1, -5},    //
+    {1084, 6, 6, 6, 0, -5},    //
+    {1089, 5, 6, 7, 1, -5},    //
+    {1093, 5, 8, 7, 1, -7},    //
+    {1098, 4, 6, 6, 1, -5},    //
+    {1101, 5, 6, 6, 0, -5},    //
+    {1105, 6, 6, 7, 1, -5},    //
+    {1110, 5, 6, 7, 1, -5},    //
+    {1114, 6, 6, 7, 0, -5},    //
+    {1119, 5, 6, 7, 1, -5},    //
+    {1123, 5, 9, 7, 1, -5},    //
+    {1129, 6, 6, 6, 0, -5},    //
+    {1134, 5, 6, 5, 0, -5},    //
+    {1138, 5, 9, 6, 0, -5},    //
+    {1144, 10, 11, 10, 0, -7}, //
+    {1158, 5, 6, 6, 0, -5},    //
+    {1162, 6, 7, 7, 1, -5},    //
+    {1168, 4, 6, 6, 1, -5},    //
+    {1171, 6, 6, 8, 1, -5},    //
+    {1176, 7, 7, 9, 1, -5},    //
+    {1183, 7, 6, 8, 0, -5},    //
+    {1189, 6, 6, 8, 1, -5},    //
+    {1194, 5, 6, 6, 1, -5},    //
+    {1198, 5, 6, 6, 1, -5},    //
+    {1202, 8, 6, 9, 1, -5},    //
+    {1208, 5, 6, 7, 1, -5}     //
+};
+
+const GFXfont FreeSans6pt8bCyrillic PROGMEM = {(uint8_t *)FreeSans6pt8bCyrillicBitmaps, (GFXglyph *)FreeSans6pt8bCyrillicGlyphs,
+                                               0x20, 0xFF, 16};

src/graphics/niche/Fonts/README.md

@@ -0,0 +1,4 @@
+# NicheGraphics - Fonts
+
+A common area to store fonts which might be reused by different Niche Graphics UIs
+In future, we may want to separate these by library (AdafruitGFX, u8g2, etc)

src/graphics/niche/InkHUD/Applet.cpp

@@ -0,0 +1,843 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+#include "./Applet.h"
+
+#include "RTC.h"
+
+using namespace NicheGraphics;
+
+InkHUD::AppletFont InkHUD::Applet::fontLarge;      // General purpose font. Set by setDefaultFonts
+InkHUD::AppletFont InkHUD::Applet::fontSmall;      // General purpose font. Set by setDefaultFonts
+constexpr float InkHUD::Applet::LOGO_ASPECT_RATIO; // Ratio of the Meshtastic logo
+
+InkHUD::Applet::Applet() : GFX(0, 0)
+{
+    // GFX is given initial dimensions of 0
+    // The width and height will change dynamically, depending on Applet tiling
+    // If you're getting a "divide by zero error", consider it an assert:
+    // WindowManager should be the only one controlling the rendering
+}
+
+// The raw pixel output generated by AdafruitGFX drawing
+// Hand off to the applet's tile, which will in-turn pass to the window manager
+void InkHUD::Applet::drawPixel(int16_t x, int16_t y, uint16_t color)
+{
+    // Only render pixels if they fall within user's cropped region
+    if (x >= cropLeft && x < (cropLeft + cropWidth) && y >= cropTop && y < (cropTop + cropHeight))
+        assignedTile->handleAppletPixel(x, y, (Color)color);
+}
+
+// Sets which tile the applet renders for
+// Pixel output is passed to tile during render()
+// This should only be called by Tile::assignApplet
+void InkHUD::Applet::setTile(Tile *t)
+{
+    // If we're setting (not clearing), make sure the link is "reciprocal"
+    if (t)
+        assert(t->getAssignedApplet() == this);
+
+    assignedTile = t;
+}
+
+// Which tile will the applet render() to?
+InkHUD::Tile *InkHUD::Applet::getTile()
+{
+    return assignedTile;
+}
+
+void InkHUD::Applet::render()
+{
+    assert(assignedTile);                              // Ensure that we have a tile
+    assert(assignedTile->getAssignedApplet() == this); // Ensure that we have a reciprocal link with the tile
+
+    wantRender = false;   // Clear the flag set by requestUpdate
+    wantAutoshow = false; // If we're rendering now, it means our request was considered. It may or may not have been granted.
+    wantUpdateType = Drivers::EInk::UpdateTypes::UNSPECIFIED; // Our requested type has been considered by now. Tidy up.
+
+    updateDimensions();
+    resetDrawingSpace();
+    onRender(); // Derived applet's drawing takes place here
+
+    // If our tile is (or was) highlighted, to indicate a change in focus
+    if (Tile::highlightTarget == assignedTile) {
+        // Draw the highlight
+        if (!Tile::highlightShown) {
+            drawRect(0, 0, width(), height(), BLACK);
+            Tile::startHighlightTimeout();
+            Tile::highlightShown = true;
+        }
+
+        // Clear the highlight
+        else {
+            Tile::cancelHighlightTimeout();
+            Tile::highlightShown = false;
+            Tile::highlightTarget = nullptr;
+        }
+    }
+}
+
+// Does the applet want to render now?
+// Checks whether the applet called requestUpdate() recently, in response to an event
+bool InkHUD::Applet::wantsToRender()
+{
+    return wantRender;
+}
+
+// Does the applet want to be moved to foreground before next render, to show new data?
+// User specifies whether an applet has permission for this, using the on-screen menu
+bool InkHUD::Applet::wantsToAutoshow()
+{
+    return wantAutoshow;
+}
+
+// Which technique would this applet prefer that the display use to change the image?
+Drivers::EInk::UpdateTypes InkHUD::Applet::wantsUpdateType()
+{
+    return wantUpdateType;
+}
+
+// Get size of the applet's drawing space from its tile
+void InkHUD::Applet::updateDimensions()
+{
+    assert(assignedTile);
+    WIDTH = assignedTile->getWidth();
+    HEIGHT = assignedTile->getHeight();
+    _width = WIDTH;
+    _height = HEIGHT;
+}
+
+// Ensure that render() always starts with the same initial drawing config
+void InkHUD::Applet::resetDrawingSpace()
+{
+    resetCrop();         // Allow pixel from any region of the applet to draw
+    setTextColor(BLACK); // Reset text params
+    setCursor(0, 0);
+    setTextWrap(false);
+    setFont(AppletFont()); // Restore the default AdafruitGFX font
+}
+
+// Tell the window manager that we want to render now
+// Applets should internally listen for events they are interested in, via MeshModule, CallbackObserver etc
+// When an applet decides it has heard something important, and wants to redraw, it calls this method
+// Once the window manager has given other applets a chance to process whatever event we just detected,
+// it will run Applet::render(), which may draw our applet to screen, if it is shown (forgeround)
+void InkHUD::Applet::requestUpdate(Drivers::EInk::UpdateTypes type)
+{
+    wantRender = true;
+    wantUpdateType = type;
+    WindowManager::getInstance()->requestUpdate();
+}
+
+// Ask window manager to move this applet to foreground at start of next render
+// Users select which applets have permission for this using the on-screen menu
+void InkHUD::Applet::requestAutoshow()
+{
+    wantAutoshow = true;
+}
+
+// Called when an Applet begins running
+// Active applets are considered "enabled"
+// They should now listen for events, and request their own updates
+// They may also be force rendered by the window manager at any time
+// Applets can be activated at run-time through the on-screen menu
+void InkHUD::Applet::activate()
+{
+    onActivate(); // Call derived class' handler
+    active = true;
+}
+
+// Called when an Applet stop running
+// Inactive applets are considered "disabled"
+// They should not listen for events, process data
+// They will not be rendered
+// Applets can be deactivated at run-time through the on-screen menu
+void InkHUD::Applet::deactivate()
+{
+    // If applet is still in foreground, run its onBackground code first
+    if (isForeground())
+        sendToBackground();
+
+    // If applet is active, run its onDeactivate code first
+    if (isActive())
+        onDeactivate(); // Derived class' handler
+    active = false;
+}
+
+// Is the Applet running?
+// Note: active / inactive is not related to background / foreground
+// An inactive applet is *fully* disabled
+bool InkHUD::Applet::isActive()
+{
+    return active;
+}
+
+// Begin showing the Applet
+// It will be rendered immediately to whichever tile it is assigned
+// The window manager will also now honor requestUpdate() calls from this applet
+void InkHUD::Applet::bringToForeground()
+{
+    if (!foreground) {
+        foreground = true;
+        onForeground(); // Run derived applet class' handler
+    }
+
+    requestUpdate();
+}
+
+// Stop showing the Applet
+// Calls to requestUpdate() will no longer be honored
+// When one applet moves to background, another should move to foreground
+void InkHUD::Applet::sendToBackground()
+{
+    if (foreground) {
+        foreground = false;
+        onBackground(); // Run derived applet class' handler
+    }
+}
+
+// Is the applet currently displayed on a tile
+bool InkHUD::Applet::isForeground()
+{
+    return foreground;
+}
+
+// Limit drawing to a certain region of the applet
+// Pixels outside this region will be discarded
+void InkHUD::Applet::setCrop(int16_t left, int16_t top, uint16_t width, uint16_t height)
+{
+    cropLeft = left;
+    cropTop = top;
+    cropWidth = width;
+    cropHeight = height;
+}
+
+// Allow drawing to any region of the Applet
+// Reverses Applet::setCrop
+void InkHUD::Applet::resetCrop()
+{
+    setCrop(0, 0, width(), height());
+}
+
+// Convert relative width to absolute width, in px
+// X(0) is 0
+// X(0.5) is width() / 2
+// X(1) is width()
+uint16_t InkHUD::Applet::X(float f)
+{
+    return width() * f;
+}
+
+// Convert relative hight to absolute height, in px
+// Y(0) is 0
+// Y(0.5) is height() / 2
+// Y(1) is height()
+uint16_t InkHUD::Applet::Y(float f)
+{
+    return height() * f;
+}
+
+// Print text, specifying the position of any edge / corner of the textbox
+void InkHUD::Applet::printAt(int16_t x, int16_t y, const char *text, HorizontalAlignment ha, VerticalAlignment va)
+{
+    printAt(x, y, std::string(text), ha, va);
+}
+
+// Print text, specifying the position of any edge / corner of the textbox
+void InkHUD::Applet::printAt(int16_t x, int16_t y, std::string text, HorizontalAlignment ha, VerticalAlignment va)
+{
+    // Custom font
+    // - set with AppletFont::addSubstitution
+    // - find certain UTF8 chars
+    // - replace with glpyh from custom font (or suitable ASCII addSubstitution?)
+    getFont().applySubstitutions(&text);
+
+    // We do still have to run getTextBounds to find the width
+    int16_t textOffsetX, textOffsetY;
+    uint16_t textWidth, textHeight;
+    getTextBounds(text.c_str(), 0, 0, &textOffsetX, &textOffsetY, &textWidth, &textHeight);
+
+    int16_t cursorX = 0;
+    int16_t cursorY = 0;
+
+    switch (ha) {
+    case LEFT:
+        cursorX = x - textOffsetX;
+        break;
+    case CENTER:
+        cursorX = (x - textOffsetX) - (textWidth / 2);
+        break;
+    case RIGHT:
+        cursorX = (x - textOffsetX) - textWidth;
+        break;
+    }
+
+    // We're using a fixed line height (getFontDimensions), rather than sizing to text (getTextBounds)
+    // Note: the FontDimensions values for this are unsigned
+
+    switch (va) {
+    case TOP:
+        cursorY = y + currentFont.heightAboveCursor();
+        break;
+    case MIDDLE:
+        cursorY = (y + currentFont.heightAboveCursor()) - (currentFont.lineHeight() / 2);
+        break;
+    case BOTTOM:
+        cursorY = (y + currentFont.heightAboveCursor()) - currentFont.lineHeight();
+        break;
+    }
+
+    setCursor(cursorX, cursorY);
+    print(text.c_str());
+}
+
+// Set which font should be used for subsequent drawing
+// This is AppletFont type, which is a wrapper for AdfruitGFX font, with some precalculated dimension data
+void InkHUD::Applet::setFont(AppletFont f)
+{
+    GFX::setFont(f.gfxFont);
+    currentFont = f;
+}
+
+// Get which font is currently being used for drawing
+// This is AppletFont type, which is a wrapper for AdfruitGFX font, with some precalculated dimension data
+InkHUD::AppletFont InkHUD::Applet::getFont()
+{
+    return currentFont;
+}
+
+// Set two general-purpose fonts, which are reused by many applets
+// Applets are also permitted to use other fonts, if they can justify the flash usage
+void InkHUD::Applet::setDefaultFonts(AppletFont large, AppletFont small)
+{
+    Applet::fontSmall = small;
+    Applet::fontLarge = large;
+}
+
+// Gets rendered width of a string
+// Wrapper for getTextBounds
+uint16_t InkHUD::Applet::getTextWidth(const char *text)
+{
+
+    // We do still have to run getTextBounds to find the width
+    int16_t textOffsetX, textOffsetY;
+    uint16_t textWidth, textHeight;
+    getTextBounds(text, 0, 0, &textOffsetX, &textOffsetY, &textWidth, &textHeight);
+
+    return textWidth;
+}
+
+// Gets rendered width of a string
+// Wrappe for getTextBounds
+uint16_t InkHUD::Applet::getTextWidth(std::string text)
+{
+    getFont().applySubstitutions(&text);
+
+    return getTextWidth(text.c_str());
+}
+
+// Evaluate SNR and RSSI to qualify signal strength at one of four discrete levels
+// Roughly comparable to values used by the iOS app;
+// I didn't actually go look up the code, just fit to a sample graphic I have of the iOS signal indicator
+InkHUD::SignalStrength InkHUD::Applet::getSignalStrength(float snr, float rssi)
+{
+    uint8_t score = 0;
+
+    // Give a score for the SNR
+    if (snr > -17.5)
+        score += 2;
+    else if (snr > -26.0)
+        score += 1;
+
+    // Give a score for the RSSI
+    if (rssi > -115.0)
+        score += 3;
+    else if (rssi > -120.0)
+        score += 2;
+    else if (rssi > -126.0)
+        score += 1;
+
+    // Combine scores, then give a result
+    if (score >= 5)
+        return SIGNAL_GOOD;
+    else if (score >= 4)
+        return SIGNAL_FAIR;
+    else if (score > 0)
+        return SIGNAL_BAD;
+    else
+        return SIGNAL_NONE;
+}
+
+// Apply the standard "node id" formatting to a nodenum int: !0123abdc
+std::string InkHUD::Applet::hexifyNodeNum(NodeNum num)
+{
+    // Not found in nodeDB, show a hex nodeid instead
+    char nodeIdHex[10];
+    sprintf(nodeIdHex, "!%0x", num); // Convert to the typical "fixed width hex with !" format
+    return std::string(nodeIdHex);
+}
+
+void InkHUD::Applet::printWrapped(int16_t left, int16_t top, uint16_t width, std::string text)
+{
+    // Custom font glyphs
+    // - set with AppletFont::addSubstitution
+    // - find certain UTF8 chars
+    // - replace with glpyh from custom font (or suitable ASCII addSubstitution?)
+    getFont().applySubstitutions(&text);
+
+    // Place the AdafruitGFX cursor to suit our "top" coord
+    setCursor(left, top + getFont().heightAboveCursor());
+
+    // How wide a space character is
+    // Used when simulating print, for dimensioning
+    // Works around issues where getTextDimensions() doesn't account for whitespace
+    const uint8_t wSp = getFont().widthBetweenWords();
+
+    // Move through our text, character by character
+    uint16_t wordStart = 0;
+    for (uint16_t i = 0; i < text.length(); i++) {
+
+        // Found: end of word (split by spaces or newline)
+        // Also handles end of string
+        if (text[i] == ' ' || text[i] == '\n' || i == text.length() - 1) {
+            // Isolate this word
+            uint16_t wordLength = (i - wordStart) + 1; // Plus one. Imagine: "a". End - Start is 0, but length is 1
+            std::string word = text.substr(wordStart, wordLength);
+            wordStart = i + 1; // Next word starts *after* the space
+
+            // If word is terminated by a newline char, don't actually print it.
+            // We'll manually add a new line later
+            if (word.back() == '\n')
+                word.pop_back();
+
+            // Measure the word, in px
+            int16_t l, t;
+            uint16_t w, h;
+            getTextBounds(word.c_str(), getCursorX(), getCursorY(), &l, &t, &w, &h);
+
+            // Word is short
+            if (w < width) {
+                // Word fits on current line
+                if ((l + w + wSp) < left + width)
+                    print(word.c_str());
+
+                // Word doesn't fit on current line
+                else {
+                    setCursor(left, getCursorY() + getFont().lineHeight()); // Newline
+                    print(word.c_str());
+                }
+            }
+
+            // Word is really long
+            // (wider than applet)
+            else {
+                // Horribly inefficient:
+                // Rather than working directly with the glyph sizes,
+                // we're going to run everything through getTextBounds as a c-string of length 1
+                // This is because AdafruitGFX has special internal handling for their legacy 6x8 font,
+                // which would be a pain to add manually here.
+                // These super-long strings probably don't come up often so we can maybe tolerate this.
+
+                // Todo: rewrite making use of AdafruitGFX native text wrapping
+                char cstr[] = {0, 0};
+                int16_t l, t;
+                uint16_t w, h;
+                for (uint16_t c = 0; c < word.length(); c++) {
+                    // Shove next char into a c string
+                    cstr[0] = word[c];
+                    getTextBounds(cstr, getCursorX(), getCursorY(), &l, &t, &w, &h);
+
+                    // Manual newline, if next character will spill beyond screen edge
+                    if ((l + w) > left + width)
+                        setCursor(left, getCursorY() + getFont().lineHeight());
+
+                    // Print next character
+                    print(word[c]);
+                }
+            }
+        }
+
+        // If word was terminated by a newline char, manually add the new line now
+        if (text[i] == '\n') {
+            setCursor(left, getCursorY() + getFont().lineHeight()); // Manual newline
+            wordStart = i + 1; // New word begins after the newline. Otherwise print will add an *extra* line
+        }
+    }
+}
+
+// Simulate running printWrapped, to determine how tall the block of text will be.
+// This is a wasteful way of handling things. Maybe some way to optimize in future?
+uint32_t InkHUD::Applet::getWrappedTextHeight(int16_t left, uint16_t width, std::string text)
+{
+    // Cache the current crop region
+    int16_t cL = cropLeft;
+    int16_t cT = cropTop;
+    uint16_t cW = cropWidth;
+    uint16_t cH = cropHeight;
+
+    setCrop(-1, -1, 0, 0);              // Set crop to temporarily discard all pixels
+    printWrapped(left, 0, width, text); // Simulate only - no pixels drawn
+
+    // Restore previous crop region
+    cropLeft = cL;
+    cropTop = cT;
+    cropWidth = cW;
+    cropHeight = cH;
+
+    // Note: printWrapped() offsets the initial cursor position by heightAboveCursor() val,
+    // so we need to account for that when determining the height
+    return (getCursorY() + getFont().heightBelowCursor());
+}
+
+// Fill a region with sparse diagonal lines, to create a pseudo-translucent fill
+void InkHUD::Applet::hatchRegion(int16_t x, int16_t y, uint16_t w, uint16_t h, uint8_t spacing, Color color)
+{
+    // Cache the currently cropped region
+    int16_t oldCropL = cropLeft;
+    int16_t oldCropT = cropTop;
+    uint16_t oldCropW = cropWidth;
+    uint16_t oldCropH = cropHeight;
+
+    setCrop(x, y, w, h);
+
+    // Draw lines starting along the top edge, every few px
+    for (int16_t ix = x; ix < x + w; ix += spacing) {
+        for (int16_t i = 0; i < w || i < h; i++) {
+            drawPixel(ix + i, y + i, color);
+        }
+    }
+
+    // Draw lines starting along the left edge, every few px
+    for (int16_t iy = y; iy < y + h; iy += spacing) {
+        for (int16_t i = 0; i < w || i < h; i++) {
+            drawPixel(x + i, iy + i, color);
+        }
+    }
+
+    // Restore any previous crop
+    // If none was set, this will clear
+    cropLeft = oldCropL;
+    cropTop = oldCropT;
+    cropWidth = oldCropW;
+    cropHeight = oldCropH;
+}
+
+// Get a human readable time representation of an epoch time (seconds since 1970)
+// If time is invalid, this will be an empty string
+std::string InkHUD::Applet::getTimeString(uint32_t epochSeconds)
+{
+#ifdef BUILD_EPOCH
+    constexpr uint32_t validAfterEpoch = BUILD_EPOCH - (SEC_PER_DAY * 30 * 6); // 6 Months prior to build
+#else
+    constexpr uint32_t validAfterEpoch = 1727740800 - (SEC_PER_DAY * 30 * 6); // 6 Months prior to October 1, 2024 12:00:00 AM GMT
+#endif
+
+    uint32_t epochNow = getValidTime(RTCQuality::RTCQualityDevice, true);
+
+    int32_t daysAgo = (epochNow - epochSeconds) / SEC_PER_DAY;
+    int32_t hoursAgo = (epochNow - epochSeconds) / SEC_PER_HOUR;
+
+    // Times are invalid: rtc is much older than when code was built
+    // Don't give any human readable string
+    if (epochNow <= validAfterEpoch) {
+        LOG_DEBUG("RTC prior to buildtime");
+        return "";
+    }
+
+    // Times are invalid: argument time is significantly ahead of RTC
+    // Don't give any human readable string
+    if (daysAgo < -2) {
+        LOG_DEBUG("RTC in future");
+        return "";
+    }
+
+    // Times are probably invalid: more than 6 months ago
+    if (daysAgo > 6 * 30) {
+        LOG_DEBUG("RTC val > 6 months old");
+        return "";
+    }
+
+    if (daysAgo > 1)
+        return to_string(daysAgo) + " days ago";
+
+    else if (hoursAgo > 18)
+        return "Yesterday";
+
+    else {
+
+        uint32_t hms = epochSeconds % SEC_PER_DAY;
+        hms = (hms + SEC_PER_DAY) % SEC_PER_DAY;
+
+        // Tear apart hms into h:m
+        uint32_t hour = hms / SEC_PER_HOUR;
+        uint32_t min = (hms % SEC_PER_HOUR) / SEC_PER_MIN;
+
+        // Format the clock string
+        char clockStr[11];
+        sprintf(clockStr, "%u:%02u %s", (hour % 12 == 0 ? 12 : hour % 12), min, hour > 11 ? "PM" : "AM");
+
+        return clockStr;
+    }
+}
+
+// If no argument specified, get time string for the current RTC time
+std::string InkHUD::Applet::getTimeString()
+{
+    return getTimeString(getValidTime(RTCQuality::RTCQualityDevice, true));
+}
+
+// Calculate how many nodes have been seen within our preferred window of activity
+// This period is set by user, via the menu
+// Todo: optimize to calculate once only per WindowManager::render
+uint16_t InkHUD::Applet::getActiveNodeCount()
+{
+    // Don't even try to count nodes if RTC isn't set
+    // The last heard values in nodedb will be incomprehensible
+    if (getRTCQuality() == RTCQualityNone)
+        return 0;
+
+    uint16_t count = 0;
+
+    // For each node in db
+    for (uint16_t i = 0; i < nodeDB->getNumMeshNodes(); i++) {
+        meshtastic_NodeInfoLite *node = nodeDB->getMeshNodeByIndex(i);
+
+        // Check if heard recently, and not our own node
+        if (sinceLastSeen(node) < settings.recentlyActiveSeconds && node->num != nodeDB->getNodeNum())
+            count++;
+    }
+
+    return count;
+}
+
+// Get an abbreviated, human readable, distance string
+// Honors config.display.units, to offer both metric and imperial
+std::string InkHUD::Applet::localizeDistance(uint32_t meters)
+{
+    constexpr float FEET_PER_METER = 3.28084;
+    constexpr uint16_t FEET_PER_MILE = 5280;
+
+    // Resulting string
+    std::string localized;
+
+    // Imeperial
+    if (config.display.units == meshtastic_Config_DisplayConfig_DisplayUnits_IMPERIAL) {
+        uint32_t feet = meters * FEET_PER_METER;
+        // Distant (miles, rounded)
+        if (feet > FEET_PER_MILE / 2) {
+            localized += to_string((uint32_t)roundf(feet / FEET_PER_MILE));
+            localized += "mi";
+        }
+        // Nearby (feet)
+        else {
+            localized += to_string(feet);
+            localized += "ft";
+        }
+    }
+
+    // Metric
+    else {
+        // Distant (kilometers, rounded)
+        if (meters >= 500) {
+            localized += to_string((uint32_t)roundf(meters / 1000.0));
+            localized += "km";
+        }
+        // Nearby (meters)
+        else {
+            localized += to_string(meters);
+            localized += "m";
+        }
+    }
+
+    return localized;
+}
+
+void InkHUD::Applet::printThick(int16_t xCenter, int16_t yCenter, std::string text, uint8_t thicknessX, uint8_t thicknessY)
+{
+    // How many times to draw along x axis
+    int16_t xStart;
+    int16_t xEnd;
+    switch (thicknessX) {
+    case 0:
+        assert(false);
+    case 1:
+        xStart = xCenter;
+        xEnd = xCenter;
+        break;
+    case 2:
+        xStart = xCenter;
+        xEnd = xCenter + 1;
+        break;
+    default:
+        xStart = xCenter - (thicknessX / 2);
+        xEnd = xCenter + (thicknessX / 2);
+    }
+
+    // How many times to draw along Y axis
+    int16_t yStart;
+    int16_t yEnd;
+    switch (thicknessY) {
+    case 0:
+        assert(false);
+    case 1:
+        yStart = yCenter;
+        yEnd = yCenter;
+        break;
+    case 2:
+        yStart = yCenter;
+        yEnd = yCenter + 1;
+        break;
+    default:
+        yStart = yCenter - (thicknessY / 2);
+        yEnd = yCenter + (thicknessY / 2);
+    }
+
+    // Print multiple times, overlapping
+    for (int16_t x = xStart; x <= xEnd; x++) {
+        for (int16_t y = yStart; y <= yEnd; y++) {
+            printAt(x, y, text, CENTER, MIDDLE);
+        }
+    }
+}
+
+// Allow this applet to suppress notifications
+// Asked before a notification is shown via the NotificationApplet
+// An applet might want to suppress a notification if the applet itself already displays this info
+// Example: AllMessageApplet should not approve notifications for messages, if it is in foreground
+bool InkHUD::Applet::approveNotification(InkHUD::Notification &n)
+{
+    // By default, no objection
+    return true;
+}
+
+// Draw the standard header, used by most Applets
+void InkHUD::Applet::drawHeader(std::string text)
+{
+    setFont(fontSmall);
+
+    // Y position for divider
+    // - between header text and messages
+    constexpr int16_t padDivH = 2;
+    const int16_t headerDivY = padDivH + fontSmall.lineHeight() + padDivH - 1;
+
+    // Print header
+    printAt(0, padDivH, text);
+
+    // Divider
+    // - below header text: separates message
+    // - above header text: separates other applets
+    for (int16_t x = 0; x < width(); x += 2) {
+        drawPixel(x, 0, BLACK);
+        drawPixel(x, headerDivY, BLACK); // Dotted 50%
+    }
+}
+
+// Get the height of the standard applet header
+// This will vary, depending on font
+// Applets use this value to avoid drawing overtop the header
+uint16_t InkHUD::Applet::getHeaderHeight()
+{
+    // Y position for divider
+    // - between header text and messages
+    constexpr int16_t padDivH = 2;
+    const int16_t headerDivY = padDivH + fontSmall.lineHeight() + padDivH - 1;
+
+    return headerDivY + 1; // "Plus one": height is always one more than Y position
+}
+
+// "Scale to fit": width of Meshtastic logo to fit given region, maintaining aspect ratio
+uint16_t InkHUD::Applet::getLogoWidth(uint16_t limitWidth, uint16_t limitHeight)
+{
+    // Determine whether we're limited by width or height
+    // Makes sure we draw the logo as large as possible, within the specified region,
+    // while still maintaining correct aspect ratio
+    if (limitWidth > limitHeight * LOGO_ASPECT_RATIO)
+        return limitHeight * LOGO_ASPECT_RATIO;
+    else
+        return limitWidth;
+}
+
+// "Scale to fit": height of Meshtastic logo to fit given region, maintaining aspect ratio
+uint16_t InkHUD::Applet::getLogoHeight(uint16_t limitWidth, uint16_t limitHeight)
+{
+    // Determine whether we're limited by width or height
+    // Makes sure we draw the logo as large as possible, within the specified region,
+    // while still maintaining correct aspect ratio
+    if (limitHeight > limitWidth / LOGO_ASPECT_RATIO)
+        return limitWidth / LOGO_ASPECT_RATIO;
+    else
+        return limitHeight;
+}
+
+// Draw a scalable Meshtastic logo
+// Make sure to provide dimensions which have the correct aspect ratio (~2)
+// Three paths, drawn thick using quads, with one corner "radiused"
+void InkHUD::Applet::drawLogo(int16_t centerX, int16_t centerY, uint16_t width, uint16_t height)
+{
+    struct Point {
+        int x;
+        int y;
+    };
+    typedef Point Distance;
+
+    int16_t logoTh = width * 0.068; // Thickness scales with width. Measured from logo at meshtastic.org.
+    int16_t logoL = centerX - (width / 2) + (logoTh / 2);
+    int16_t logoT = centerY - (height / 2) + (logoTh / 2);
+    int16_t logoW = width - logoTh;
+    int16_t logoH = height - logoTh;
+    int16_t logoR = logoL + logoW - 1;
+    int16_t logoB = logoT + logoH - 1;
+
+    // Points for paths (a, b, and c)
+    Point a1 = {map(0, 0, 3, logoL, logoR), logoB};
+    Point a2 = {map(1, 0, 3, logoL, logoR), logoT};
+    Point b1 = {map(1, 0, 3, logoL, logoR), logoB};
+    Point b2 = {map(2, 0, 3, logoL, logoR), logoT};
+    Point c1 = {map(2, 0, 3, logoL, logoR), logoT};
+    Point c2 = {map(3, 0, 3, logoL, logoR), logoB};
+
+    // Find right-angle to the path
+    // Used to thicken the single pixel paths
+    Distance deltaA = {abs(a2.x - a1.x), abs(a2.y - a1.y)};
+    float angle = tanh((float)deltaA.y / deltaA.x);
+
+    // Distance {at right angle from the paths), which will give corners for our "quads"
+    // The distance is unsigned. We will vary the signedness of the x and y components to suit the path and corner
+    Distance fromPath;
+    fromPath.x = cos(radians(90) - angle) * logoTh * 0.5;
+    fromPath.y = sin(radians(90) - angle) * logoTh * 0.5;
+
+    // Make the path thick: path a becomes quad a
+    Point aq1{a1.x - fromPath.x, a1.y - fromPath.y};
+    Point aq2{a2.x - fromPath.x, a2.y - fromPath.y};
+    Point aq3{a2.x + fromPath.x, a2.y + fromPath.y};
+    Point aq4{a1.x + fromPath.x, a1.y + fromPath.y};
+    fillTriangle(aq1.x, aq1.y, aq2.x, aq2.y, aq3.x, aq3.y, BLACK);
+    fillTriangle(aq1.x, aq1.y, aq3.x, aq3.y, aq4.x, aq4.y, BLACK);
+
+    // Make the path thick: path b becomes quad b
+    Point bq1{b1.x - fromPath.x, b1.y - fromPath.y};
+    Point bq2{b2.x - fromPath.x, b2.y - fromPath.y};
+    Point bq3{b2.x + fromPath.x, b2.y + fromPath.y};
+    Point bq4{b1.x + fromPath.x, b1.y + fromPath.y};
+    fillTriangle(bq1.x, bq1.y, bq2.x, bq2.y, bq3.x, bq3.y, BLACK);
+    fillTriangle(bq1.x, bq1.y, bq3.x, bq3.y, bq4.x, bq4.y, BLACK);
+
+    // Make the path hick: path c becomes quad c
+    Point cq1{c1.x - fromPath.x, c1.y + fromPath.y};
+    Point cq2{c2.x - fromPath.x, c2.y + fromPath.y};
+    Point cq3{c2.x + fromPath.x, c2.y - fromPath.y};
+    Point cq4{c1.x + fromPath.x, c1.y - fromPath.y};
+    fillTriangle(cq1.x, cq1.y, cq2.x, cq2.y, cq3.x, cq3.y, BLACK);
+    fillTriangle(cq1.x, cq1.y, cq3.x, cq3.y, cq4.x, cq4.y, BLACK);
+
+    // Radius the intersection of quad b and quad c
+    // Don't attempt if logo is tiny
+    if (logoTh > 3) {
+        // The radius for the cap *should* be the same as logoTh, but it's not, due to accumulated rounding
+        // We get better results just rederiving it
+        int16_t capRad = sqrt(pow(fromPath.x, 2) + pow(fromPath.y, 2));
+        fillCircle(b2.x, b2.y, capRad, BLACK);
+    }
+}
+
+#endif

src/graphics/niche/InkHUD/Applet.h

@@ -0,0 +1,234 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+/*
+
+    Base class for InkHUD applets
+    Must be overriden
+
+    An applet is one "program" which may show info on the display.
+
+    ===================================
+    Preliminary notes, for the curious
+    ===================================
+
+    (This info to be streamlined, and moved to a more official documentation)
+
+    User Applets vs System Applets
+    -------------------------------
+
+    There are either "User Applets", or "System Applets".
+    This concept is only for our understanding; as far at the code is concerned, both are just "Applets"
+
+    User applets are the "normal" applets.
+    User applets are applets like "AllMessageApplet", or "MapApplet".
+    User applets may be enabled / disabled by user, via the on-screen menu.
+    Incorporating new UserApplets is easy: just add them during setupNicheGraphics
+    If a UserApplet is not added during setupNicheGraphics, it will not be built.
+    The set of available UserApplets is allowed to vary from device to device.
+
+
+    Examples of system applets include "NotificationApplet" and "MenuApplet".
+    For their own reasons, system applets each require some amount of special handling.
+
+    Drawing
+    --------
+
+    *All* drawing must be performed by an Applet.
+    Applets implement the onRender() method, where all drawing takes place.
+    Applets are told how wide and tall they are, and are expected to draw to suit this size.
+    When an applet draws, it uses co-ordinates in "Applet Space": between 0 and applet width/height.
+
+    Event-driven rendering
+    -----------------------
+
+    Applets don't render unless something on the display needs to change.
+    An applet is expected to determine for itself when it has new info to display.
+    It should interact with the firmware via the MeshModule API, via Observables, etc.
+    Please don't directly add hooks throughout the existing firmware code.
+
+    When an applet decides it would like to update the display, it should call requestUpdate()
+    The WindowManager will shortly call the onRender() method for all affected applets
+
+    An Applet may be unexpectedly asked to render at any point in time.
+
+    Applets should cache their data, but not their pixel output: they should re-render when onRender runs.
+    An Applet's dimensions are not know until onRender is called, so pre-rendering of UI elements is prohibited.
+
+    Tiles
+    -----
+
+    Applets are assigned to "Tiles".
+    Assigning an applet to a tile creates a reciprocal link between the two.
+    When an applet renders, it passes pixels to its tile.
+    The tile translates these to the correct position, to be placed into the fullscreen framebuffer.
+    User applets don't get to choose their own tile; the multiplexing is handled by the WindowManager.
+    System applets might do strange things though.
+
+    Foreground and Background
+    -------------------------
+
+    The user can cycle between applets by short-pressing the user button.
+    Any applets which are currently displayed on the display are "foreground".
+    When the user button is short pressed, and an applet is hidden, it becomes "background".
+
+    Although the WindowManager will not render background applets, they should still collect data,
+    so they are ready to display when they are brought to foreground again.
+    Even if they are in background, Applets should still request updates when an event affects them,
+    as the user may have given them permission to "autoshow"; bringing themselves foreground automatically
+
+    Applets can implement the onForeground and onBackground methods to handle this change in state.
+    They can also check their state by calling isForeground() at any time.
+
+    Active and Inactive
+    -------------------
+
+    The user can select which applets are available, using the onscreen applet selection menu.
+    Applets which are enabled in this menu are "active"; otherwise they are "inactive".
+
+    An inactive applet is expected not collect data; not to consume resources.
+    Applets are activated at boot, or when enabled via the menu.
+    They are deactivated at shutdown, or when disabled via the menu.
+
+    Applets can implement the onActivation and onDeactivation methods to handle this change in state.
+
+*/
+
+#pragma once
+
+#include "configuration.h"
+
+#include <GFX.h>
+
+#include "./AppletFont.h"
+#include "./Applets/System/Notification/Notification.h"
+#include "./Tile.h"
+#include "./Types.h"
+#include "./WindowManager.h"
+#include "graphics/niche/Drivers/EInk/EInk.h"
+
+namespace NicheGraphics::InkHUD
+{
+
+using NicheGraphics::Drivers::EInk;
+using std::to_string;
+
+class Tile;
+class WindowManager;
+
+class Applet : public GFX
+{
+  public:
+    Applet();
+
+    void setTile(Tile *t); // Applets draw via a tile (for multiplexing)
+    Tile *getTile();
+
+    void render();
+    bool wantsToRender();   // Check whether applet wants to render
+    bool wantsToAutoshow(); // Check whether applets wants to become foreground, to show new data, if permitted
+    Drivers::EInk::UpdateTypes wantsUpdateType(); // Check which display update type the applet would prefer
+    void updateDimensions();                      // Get current size from tile
+    void resetDrawingSpace();                     // Makes sure every render starts with same parameters
+
+    // Change the applet's state
+
+    void activate();
+    void deactivate();
+    void bringToForeground();
+    void sendToBackground();
+
+    // Info about applet's state
+
+    bool isActive();
+    bool isForeground();
+
+    // Allow derived applets to handle changes in state
+
+    virtual void onRender() = 0; // All drawing happens here
+    virtual void onActivate() {}
+    virtual void onDeactivate() {}
+    virtual void onForeground() {}
+    virtual void onBackground() {}
+    virtual void onShutdown() {}
+    virtual void onButtonShortPress() {} // For use by System Applets only
+    virtual void onButtonLongPress() {}  // For use by System Applets only
+    virtual void onLockAvailable() {}    // For use by System Applets only
+
+    virtual bool approveNotification(Notification &n); // Allow an applet to veto a notification
+
+    static void setDefaultFonts(AppletFont large, AppletFont small); // Set the general purpose fonts
+    static uint16_t getHeaderHeight();                               // How tall is the "standard" applet header
+
+    const char *name = nullptr; // Shown in applet selection menu
+
+  protected:
+    // Place a single pixel. All drawing methods output through here
+    void drawPixel(int16_t x, int16_t y, uint16_t color) override;
+
+    // Tell WindowManager to update display
+    void requestUpdate(EInk::UpdateTypes type = EInk::UpdateTypes::UNSPECIFIED);
+
+    // Ask for applet to be moved to foreground
+    void requestAutoshow();
+
+    uint16_t X(float f);                                                      // Map applet width, mapped from 0 to 1.0
+    uint16_t Y(float f);                                                      // Map applet height, mapped from 0 to 1.0
+    void setCrop(int16_t left, int16_t top, uint16_t width, uint16_t height); // Ignore pixels drawn outside a certain region
+    void resetCrop();                                                         // Removes setCrop()
+
+    void setFont(AppletFont f);
+    AppletFont getFont();
+
+    uint16_t getTextWidth(std::string text);
+    uint16_t getTextWidth(const char *text);
+
+    void printAt(int16_t x, int16_t y, const char *text, HorizontalAlignment ha = LEFT, VerticalAlignment va = TOP);
+    void printAt(int16_t x, int16_t y, std::string text, HorizontalAlignment ha = LEFT, VerticalAlignment va = TOP);
+    void printThick(int16_t xCenter, int16_t yCenter, std::string text, uint8_t thicknessX, uint8_t thicknessY);
+
+    // Print text, with per-word line wrapping
+    void printWrapped(int16_t left, int16_t top, uint16_t width, std::string text);
+    uint32_t getWrappedTextHeight(int16_t left, uint16_t width, std::string text);
+
+    void hatchRegion(int16_t x, int16_t y, uint16_t w, uint16_t h, uint8_t spacing, Color color); // Fill with sparse lines
+    void drawHeader(std::string text); // Draw the standard applet header
+
+    static constexpr float LOGO_ASPECT_RATIO = 1.9;                    // Width:Height for drawing the Meshtastic logo
+    uint16_t getLogoWidth(uint16_t limitWidth, uint16_t limitHeight);  // Size Meshtastic logo to fit within region
+    uint16_t getLogoHeight(uint16_t limitWidth, uint16_t limitHeight); // Size Meshtastic logo to fit within region
+    void drawLogo(int16_t centerX, int16_t centerY, uint16_t width, uint16_t height); // Draw the meshtastic logo
+
+    std::string hexifyNodeNum(NodeNum num);
+    SignalStrength getSignalStrength(float snr, float rssi); // Interpret SNR and RSSI, as an easy to understand value
+    std::string getTimeString(uint32_t epochSeconds);        // Human readable
+    std::string getTimeString();                             // Current time, human readable
+    uint16_t getActiveNodeCount();                           // Duration determined by user, in onscreen menu
+    std::string localizeDistance(uint32_t meters);           // Human readable distance, imperial or metric
+
+    static AppletFont fontSmall, fontLarge; // General purpose fonts, used cross-applet
+
+  private:
+    Tile *assignedTile = nullptr; // Rendered pixels are fed into a Tile object, which translates them, then passes to WM
+    bool active = false;          // Has the user enabled this applet (at run-time)?
+    bool foreground = false;      // Is the applet currently drawn on a tile?
+
+    bool wantRender = false;   // In some situations, checked by WindowManager when updating, to skip unneeded redrawing.
+    bool wantAutoshow = false; // Does the applet have new data it would like to display in foreground?
+    NicheGraphics::Drivers::EInk::UpdateTypes wantUpdateType =
+        NicheGraphics::Drivers::EInk::UpdateTypes::UNSPECIFIED; // Which update method we'd prefer when redrawing the display
+
+    using GFX::setFont;     // Make sure derived classes use AppletFont instead of AdafruitGFX fonts directly
+    using GFX::setRotation; // Block setRotation calls. Rotation is handled globally by WindowManager.
+
+    AppletFont currentFont; // As passed to setFont
+
+    // As set by setCrop
+    int16_t cropLeft;
+    int16_t cropTop;
+    uint16_t cropWidth;
+    uint16_t cropHeight;
+};
+
+}; // namespace NicheGraphics::InkHUD
+
+#endif

src/graphics/niche/InkHUD/AppletFont.cpp

@@ -0,0 +1,208 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+#include "./AppletFont.h"
+
+using namespace NicheGraphics;
+
+InkHUD::AppletFont::AppletFont()
+{
+    // Default constructor uses the in-built AdafruitGFX font
+}
+
+InkHUD::AppletFont::AppletFont(const GFXfont &adafruitGFXFont) : gfxFont(&adafruitGFXFont)
+{
+    // AdafruitGFX fonts are drawn relative to a "cursor line";
+    // they print as if the glyphs resting on the line of piece of ruled paper.
+    // The glyphs also each have a different height.
+
+    // To simplify drawing, we will scan the entire font now, and determine an appropriate height for a line of text
+    // We also need to know where that "cursor line" sits inside this "line height";
+    // we need this additional info in order to align text by top-left, bottom-right, etc
+
+    // AdafruitGFX fonts do declare a line-height, but this seems to include a certain amount of padding,
+    // which we'd rather not deal with. If we want padding, we'll add it manually.
+
+    // Scan each glyph in the AdafruitGFX font
+    for (uint16_t i = 0; i <= (gfxFont->last - gfxFont->first); i++) {
+        uint8_t glyphHeight = gfxFont->glyph[i].height; // Height of glyph
+        this->height = max(this->height, glyphHeight);  // Store if it's a new max
+
+        // Calculate how far the glyph rises the cursor line
+        // Store if new max value
+        // Caution: signed and unsigned types
+        int8_t glyphAscender = 0 - gfxFont->glyph[i].yOffset;
+        if (glyphAscender > 0)
+            this->ascenderHeight = max(this->ascenderHeight, (uint8_t)glyphAscender);
+    }
+
+    // Determine how far characters may hang "below the line"
+    descenderHeight = height - ascenderHeight;
+
+    // Find how far the cursor advances when we "print" a space character
+    spaceCharWidth = gfxFont->glyph[(uint8_t)' ' - gfxFont->first].xAdvance;
+}
+
+uint8_t InkHUD::AppletFont::lineHeight()
+{
+    return this->height;
+}
+
+// AdafruitGFX fonts print characters so that they nicely on an imaginary line (think: ruled paper).
+// This value is the height of the font, above that imaginary line.
+// Used to calculate the true height of the font
+uint8_t InkHUD::AppletFont::heightAboveCursor()
+{
+    return this->ascenderHeight;
+}
+
+// AdafruitGFX fonts print characters so that they nicely on an imaginary line (think: ruled paper).
+// This value is the height of the font, below that imaginary line.
+// Used to calculate the true height of the font
+uint8_t InkHUD::AppletFont::heightBelowCursor()
+{
+    return this->descenderHeight;
+}
+
+// Width of the space character
+// Used with Applet::printWrapped
+uint8_t InkHUD::AppletFont::widthBetweenWords()
+{
+    return this->spaceCharWidth;
+}
+
+// Add to the list of substituted glyphs
+// This "find and replace" operation will be run before text is printed
+// Used to swap out UTF8 special characters, either with a custom font, or with a suitable ASCII approximation
+void InkHUD::AppletFont::addSubstitution(const char *from, const char *to)
+{
+    substitutions.push_back({.from = from, .to = to});
+}
+
+// Run all registered subtitutions on a string
+// Used to swap out UTF8 special chars
+void InkHUD::AppletFont::applySubstitutions(std::string *text)
+{
+    // For each substitution
+    for (Substitution s : substitutions) {
+
+        // Find and replace
+        // - search for Substitution::from
+        // - replace with Subsitution::to
+        size_t i = text->find(s.from);
+        while (i != std::string::npos) {
+            text->replace(i, strlen(s.from), s.to);
+            i = text->find(s.from, i); // Continue looking from last position
+        }
+    }
+}
+
+// Apply a set of substitutions which remap UTF8 for a Windows-1251 font
+// Windows-1251 is an 8-bit character encoding, designed to cover languages that use the Cyrillic script
+void InkHUD::AppletFont::addSubstitutionsWin1251()
+{
+    addSubstitution("Ђ", "\x80");
+    addSubstitution("Ѓ", "\x81");
+    addSubstitution("ѓ", "\x83");
+    addSubstitution("€", "\x88");
+    addSubstitution("Љ", "\x8A");
+    addSubstitution("Њ", "\x8C");
+    addSubstitution("Ќ", "\x8D");
+    addSubstitution("Ћ", "\x8E");
+    addSubstitution("Џ", "\x8F");
+
+    addSubstitution("ђ", "\x90");
+    addSubstitution("љ", "\x9A");
+    addSubstitution("њ", "\x9C");
+    addSubstitution("ќ", "\x9D");
+    addSubstitution("ћ", "\x9E");
+    addSubstitution("џ", "\x9F");
+
+    addSubstitution("Ў", "\xA1");
+    addSubstitution("ў", "\xA2");
+    addSubstitution("Ј", "\xA3");
+    addSubstitution("Ґ", "\xA5");
+    addSubstitution("Ё", "\xA8");
+    addSubstitution("Є", "\xAA");
+    addSubstitution("Ї", "\xAF");
+
+    addSubstitution("І", "\xB2");
+    addSubstitution("і", "\xB3");
+    addSubstitution("ґ", "\xB4");
+    addSubstitution("ё", "\xB8");
+    addSubstitution("№", "\xB9");
+    addSubstitution("є", "\xBA");
+    addSubstitution("ј", "\xBC");
+    addSubstitution("Ѕ", "\xBD");
+    addSubstitution("ѕ", "\xBE");
+    addSubstitution("ї", "\xBF");
+
+    addSubstitution("А", "\xC0");
+    addSubstitution("Б", "\xC1");
+    addSubstitution("В", "\xC2");
+    addSubstitution("Г", "\xC3");
+    addSubstitution("Д", "\xC4");
+    addSubstitution("Е", "\xC5");
+    addSubstitution("Ж", "\xC6");
+    addSubstitution("З", "\xC7");
+    addSubstitution("И", "\xC8");
+    addSubstitution("Й", "\xC9");
+    addSubstitution("К", "\xCA");
+    addSubstitution("Л", "\xCB");
+    addSubstitution("М", "\xCC");
+    addSubstitution("Н", "\xCD");
+    addSubstitution("О", "\xCE");
+    addSubstitution("П", "\xCF");
+
+    addSubstitution("Р", "\xD0");
+    addSubstitution("С", "\xD1");
+    addSubstitution("Т", "\xD2");
+    addSubstitution("У", "\xD3");
+    addSubstitution("Ф", "\xD4");
+    addSubstitution("Х", "\xD5");
+    addSubstitution("Ц", "\xD6");
+    addSubstitution("Ч", "\xD7");
+    addSubstitution("Ш", "\xD8");
+    addSubstitution("Щ", "\xD9");
+    addSubstitution("Ъ", "\xDA");
+    addSubstitution("Ы", "\xDB");
+    addSubstitution("Ь", "\xDC");
+    addSubstitution("Э", "\xDD");
+    addSubstitution("Ю", "\xDE");
+    addSubstitution("Я", "\xDF");
+
+    addSubstitution("а", "\xE0");
+    addSubstitution("б", "\xE1");
+    addSubstitution("в", "\xE2");
+    addSubstitution("г", "\xE3");
+    addSubstitution("д", "\xE4");
+    addSubstitution("е", "\xE5");
+    addSubstitution("ж", "\xE6");
+    addSubstitution("з", "\xE7");
+    addSubstitution("и", "\xE8");
+    addSubstitution("й", "\xE9");
+    addSubstitution("к", "\xEA");
+    addSubstitution("л", "\xEB");
+    addSubstitution("м", "\xEC");
+    addSubstitution("н", "\xED");
+    addSubstitution("о", "\xEE");
+    addSubstitution("п", "\xEF");
+
+    addSubstitution("р", "\xF0");
+    addSubstitution("с", "\xF1");
+    addSubstitution("т", "\xF2");
+    addSubstitution("у", "\xF3");
+    addSubstitution("ф", "\xF4");
+    addSubstitution("х", "\xF5");
+    addSubstitution("ц", "\xF6");
+    addSubstitution("ч", "\xF7");
+    addSubstitution("ш", "\xF8");
+    addSubstitution("щ", "\xF9");
+    addSubstitution("ъ", "\xFA");
+    addSubstitution("ы", "\xFB");
+    addSubstitution("ь", "\xFC");
+    addSubstitution("э", "\xFD");
+    addSubstitution("ю", "\xFE");
+    addSubstitution("я", "\xFF");
+}
+
+#endif

src/graphics/niche/InkHUD/AppletFont.h

@@ -0,0 +1,59 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+/*
+
+    Wrapper class for an AdafruitGFX font
+    Pre-calculates some font dimension info which InkHUD uses repeatedly
+
+    Also contains an optional set of "substitutions".
+    These can be used to detect special UTF8 chars, and replace occurrences with a remapped char val to suit a custom font
+    These can also be used to swap UTF8 chars for a suitable ASCII substitution (e.g. German ö -> oe, etc)
+
+*/
+
+#pragma once
+
+#include "configuration.h"
+
+#include <GFX.h>
+
+namespace NicheGraphics::InkHUD
+{
+
+// An AdafruitGFX font, bundled with precalculated dimensions which are used frequently by InkHUD
+class AppletFont
+{
+  public:
+    AppletFont();
+    AppletFont(const GFXfont &adafruitGFXFont);
+    uint8_t lineHeight();
+    uint8_t heightAboveCursor();
+    uint8_t heightBelowCursor();
+    uint8_t widthBetweenWords();
+
+    void applySubstitutions(std::string *text);             // Run all char-substitution operations, prior to printing
+    void addSubstitution(const char *from, const char *to); // Register a find-replace action, for remapping UTF8 chars
+    void addSubstitutionsWin1251();                         // Cyrillic fonts: remap UTF8 values to their Win-1251 equivalent
+    // Todo: Polish font
+
+    const GFXfont *gfxFont = NULL; // Default value: in-built AdafruitGFX font
+
+  private:
+    uint8_t height = 8;          // Default value: in-built AdafruitGFX font
+    uint8_t ascenderHeight = 0;  // Default value: in-built AdafruitGFX font
+    uint8_t descenderHeight = 8; // Default value: in-built AdafruitGFX font
+    uint8_t spaceCharWidth = 8;  // Default value: in-built AdafruitGFX font
+
+    // One pair of find-replace values, for substituting or remapping UTF8 chars
+    struct Substitution {
+        const char *from;
+        const char *to;
+    };
+
+    // List of all character substitutions to run, prior to printing a string
+    std::vector<Substitution> substitutions;
+};
+
+} // namespace NicheGraphics::InkHUD
+
+#endif

src/graphics/niche/InkHUD/Applets/Bases/Map/MapApplet.cpp

@@ -0,0 +1,429 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+#include "./MapApplet.h"
+
+using namespace NicheGraphics;
+
+void InkHUD::MapApplet::onRender()
+{
+    setFont(fontSmall);
+
+    // Abort if no markers to render
+    if (!enoughMarkers()) {
+        printAt(X(0.5), Y(0.5) - (getFont().lineHeight() / 2), "Node positions", CENTER, MIDDLE);
+        printAt(X(0.5), Y(0.5) + (getFont().lineHeight() / 2), "will appear here", CENTER, MIDDLE);
+        return;
+    }
+
+    // Find center of map
+    // - latitude and longitude
+    // - will be placed at X(0.5), Y(0.5)
+    getMapCenter(&latCenter, &lngCenter);
+
+    // Calculate North+East distance of each node to map center
+    // - which nodes to use controlled by virtual shouldDrawNode method
+    calculateAllMarkers();
+
+    // Set the region shown on the map
+    // - default: fit all nodes, plus padding
+    // - maybe overriden by derived applet
+    getMapSize(&widthMeters, &heightMeters);
+
+    // Set the metersToPx conversion value
+    calculateMapScale();
+
+    // Special marker for own node
+    meshtastic_NodeInfoLite *ourNode = nodeDB->getMeshNode(nodeDB->getNodeNum());
+    if (ourNode && nodeDB->hasValidPosition(ourNode))
+        drawLabeledMarker(ourNode);
+
+    // Draw all markers
+    for (Marker m : markers) {
+        int16_t x = X(0.5) + (m.eastMeters * metersToPx);
+        int16_t y = Y(0.5) - (m.northMeters * metersToPx);
+
+        // Cross Size
+        constexpr uint16_t csMin = 5;
+        constexpr uint16_t csMax = 12;
+
+        // Too many hops away
+        if (m.hasHopsAway && m.hopsAway > config.lora.hop_limit) // Too many mops
+            printAt(x, y, "!", CENTER, MIDDLE);
+        else if (!m.hasHopsAway) // Unknown hops
+            drawCross(x, y, csMin);
+        else // The fewer hops, the larger the cross
+            drawCross(x, y, map(m.hopsAway, 0, config.lora.hop_limit, csMax, csMin));
+    }
+}
+
+// Find the center point, in the middle of all node positions
+// Calculated values are written to the *lat and *long pointer args
+// - Finds the "mean lat long"
+// - Calculates furthest nodes from "mean lat long"
+// - Place map center directly between these furthest nodes
+
+void InkHUD::MapApplet::getMapCenter(float *lat, float *lng)
+{
+    // Find mean lat long coords
+    // ============================
+    // - assigning X, Y and Z values to position on Earth's surface in 3D space, relative to center of planet
+    // - averages the x, y and z coords
+    // - uses tan to find angles for lat / long degrees
+    //   - longitude: triangle formed by x and y (on plane of the equator)
+    //   - latitude: triangle formed by z (north south),
+    //     and the line along plane of equator which stetches from earth's axis to where point xyz intersects planet's surface
+
+    // Working totals, averaged after nodeDB processed
+    uint32_t positionCount = 0;
+    float xAvg = 0;
+    float yAvg = 0;
+    float zAvg = 0;
+
+    // For each node in db
+    for (uint32_t i = 0; i < nodeDB->getNumMeshNodes(); i++) {
+        meshtastic_NodeInfoLite *node = nodeDB->getMeshNodeByIndex(i);
+
+        // Skip if no position
+        if (!nodeDB->hasValidPosition(node))
+            continue;
+
+        // Skip if derived applet doesn't want to show this node on the map
+        if (!shouldDrawNode(node))
+            continue;
+
+        // Latitude and Longitude of node, in radians
+        float latRad = node->position.latitude_i * (1e-7) * DEG_TO_RAD;
+        float lngRad = node->position.longitude_i * (1e-7) * DEG_TO_RAD;
+
+        // Convert to cartesian points, with center of earth at 0, 0, 0
+        // Exact distance from center is irrelevant, as we're only interested in the vector
+        float x = cos(latRad) * cos(lngRad);
+        float y = cos(latRad) * sin(lngRad);
+        float z = sin(latRad);
+
+        // To find mean values shortly
+        xAvg += x;
+        yAvg += y;
+        zAvg += z;
+        positionCount++;
+    }
+
+    // All NodeDB processed, find mean values
+    xAvg /= positionCount;
+    yAvg /= positionCount;
+    zAvg /= positionCount;
+
+    // Longitude from cartesian coords
+    // (Angle from 3D coords describing a point of globe's surface)
+    /*
+                      UK
+                   /-------\
+    (Top View)   /-         -\
+               /-      (You)  -\
+             /-           .     -\
+           /-             . X     -\
+     Asia -             ...         - USA
+           \-           Y         -/
+             \-                 -/
+               \-             -/
+                 \-         -/
+                   \- -----/
+                   Pacific
+
+    */
+
+    *lng = atan2(yAvg, xAvg) * RAD_TO_DEG;
+
+    // Latitude from cartesian cooods
+    // (Angle from 3D coords describing a point on the globe's surface)
+    // As latitude increases, distance from the Earth's north-south axis out to our surface point decreases.
+    // Means we need to first find the hypotenuse which becomes base of our triangle in the second step
+    /*
+                       UK                                         North
+                    /-------\                 (Front View)      /-------\
+     (Top View)   /-         -\                               /-         -\
+                /-       (You) -\                           /-(You)        -\
+              /-         /.      -\                       /-   .             -\
+            /-    √X²+Y²/ . X      -\                   /-   Z .               -\
+    Asia   -           /...          - USA             -       .....             -
+            \-           Y         -/                   \-     √X²+Y²          -/
+              \-                 -/                       \-                 -/
+                \-             -/                           \-             -/
+                  \-         -/                               \-         -/
+                    \- -----/                                   \- -----/
+                     Pacific                                      South
+    */
+
+    float hypotenuse = sqrt((xAvg * xAvg) + (yAvg * yAvg)); // Distance from globe's north-south axis to surface intersect
+    *lat = atan2(zAvg, hypotenuse) * RAD_TO_DEG;
+
+    // ----------------------------------------------
+    // This has given us the "mean position"
+    // This will be a position *somewhere* near the center of our nodes.
+    // What we actually want is to place our center so that our outermost nodes end up on the border of our map.
+    // The only real use of our "mean position" is to give us a reference frame:
+    // which direction is east, and which is west.
+    //------------------------------------------------
+
+    // Find furthest nodes from "mean lat long"
+    // ========================================
+
+    float northernmost = latCenter;
+    float southernmost = latCenter;
+    float easternmost = lngCenter;
+    float westernmost = lngCenter;
+
+    for (uint8_t i = 0; i < nodeDB->getNumMeshNodes(); i++) {
+        meshtastic_NodeInfoLite *node = nodeDB->getMeshNodeByIndex(i);
+
+        // Skip if no position
+        if (!nodeDB->hasValidPosition(node))
+            continue;
+
+        // Skip if derived applet doesn't want to show this node on the map
+        if (!shouldDrawNode(node))
+            continue;
+
+        // Check for a new top or bottom latitude
+        float lat = node->position.latitude_i * 1e-7;
+        northernmost = max(northernmost, lat);
+        southernmost = min(southernmost, lat);
+
+        // Longitude is trickier
+        float lng = node->position.longitude_i * 1e-7;
+        float degEastward = fmod(((lng - lngCenter) + 360), 360);      // Degrees travelled east from lngCenter to reach node
+        float degWestward = abs(fmod(((lng - lngCenter) - 360), 360)); // Degrees travelled west from lngCenter to reach node
+        if (degEastward < degWestward)
+            easternmost = max(easternmost, lngCenter + degEastward);
+        else
+            westernmost = min(westernmost, lngCenter - degWestward);
+    }
+
+    // Todo: check for issues with map spans >180 deg. MQTT only..
+    latCenter = (northernmost + southernmost) / 2;
+    lngCenter = (westernmost + easternmost) / 2;
+
+    // In case our new center is west of -180, or east of +180, for some reason
+    lngCenter = fmod(lngCenter, 180);
+}
+
+// Size of map in meters
+// Grown to fit the nodes furthest from map center
+// Overridable if derived applet wants a custom map size (fixed size?)
+void InkHUD::MapApplet::getMapSize(uint32_t *widthMeters, uint32_t *heightMeters)
+{
+    // Reset the value
+    *widthMeters = 0;
+    *heightMeters = 0;
+
+    // Find the greatest distance horizontally and vertically from map center
+    for (Marker m : markers) {
+        *widthMeters = max(*widthMeters, (uint32_t)abs(m.eastMeters) * 2);
+        *heightMeters = max(*heightMeters, (uint32_t)abs(m.northMeters) * 2);
+    }
+
+    // Add padding
+    *widthMeters *= 1.1;
+    *heightMeters *= 1.1;
+}
+
+// Convert and store info we need for drawing a marker
+// Lat / long to "meters relative to map center", for position on screen
+// Info about hopsAway, for marker size
+InkHUD::MapApplet::Marker InkHUD::MapApplet::calculateMarker(float lat, float lng, bool hasHopsAway, uint8_t hopsAway)
+{
+    assert(lat != 0 || lng != 0); // Not null island. Applets should check this before calling.
+
+    // Bearing and distance from map center to node
+    float distanceFromCenter = GeoCoord::latLongToMeter(latCenter, lngCenter, lat, lng);
+    float bearingFromCenter = GeoCoord::bearing(latCenter, lngCenter, lat, lng); // in radians
+
+    // Split into meters north and meters east components (signed)
+    // - signedness of cos / sin automatically sets negative if south or west
+    float northMeters = cos(bearingFromCenter) * distanceFromCenter;
+    float eastMeters = sin(bearingFromCenter) * distanceFromCenter;
+
+    // Store this as a new marker
+    Marker m;
+    m.eastMeters = eastMeters;
+    m.northMeters = northMeters;
+    m.hasHopsAway = hasHopsAway;
+    m.hopsAway = hopsAway;
+    return m;
+}
+
+// Draw a marker on the map for a node, with a shortname label, and backing box
+void InkHUD::MapApplet::drawLabeledMarker(meshtastic_NodeInfoLite *node)
+{
+    // Find x and y position based on node's position in nodeDB
+    assert(nodeDB->hasValidPosition(node));
+    Marker m = calculateMarker(node->position.latitude_i * 1e-7,  // Lat, converted from Meshtastic's internal int32 style
+                               node->position.longitude_i * 1e-7, // Long, convered from Meshtastic's internal int32 style
+                               node->has_hops_away,               // Is the hopsAway number valid
+                               node->hops_away                    // Hops away
+    );
+
+    // Convert to pixel coords
+    int16_t markerX = X(0.5) + (m.eastMeters * metersToPx);
+    int16_t markerY = Y(0.5) - (m.northMeters * metersToPx);
+
+    constexpr uint16_t paddingH = 2;
+    constexpr uint16_t paddingW = 4;
+    uint16_t paddingInnerW = 2;            // Zero'd out if no text
+    constexpr uint16_t markerSizeMax = 12; // Size of cross (if marker uses a cross)
+    constexpr uint16_t markerSizeMin = 5;
+
+    int16_t textX;
+    int16_t textY;
+    uint16_t textW;
+    uint16_t textH;
+    int16_t labelX;
+    int16_t labelY;
+    uint16_t labelW;
+    uint16_t labelH;
+    uint8_t markerSize;
+
+    bool tooManyHops = node->hops_away > config.lora.hop_limit;
+    bool isOurNode = node->num == nodeDB->getNodeNum();
+    bool unknownHops = !node->has_hops_away && !isOurNode;
+
+    // We will draw a left or right hand variant, to place text towards screen center
+    // Hopfully avoid text spilling off screen
+    // Most values are the same, regardless of left-right handedness
+
+    // Pick emblem style
+    if (tooManyHops)
+        markerSize = getTextWidth("!");
+    else if (unknownHops)
+        markerSize = markerSizeMin;
+    else
+        markerSize = map(node->hops_away, 0, config.lora.hop_limit, markerSizeMax, markerSizeMin);
+
+    // Common dimensions (left or right variant)
+    textW = getTextWidth(node->user.short_name);
+    if (textW == 0)
+        paddingInnerW = 0; // If no text, no padding for text
+    textH = fontSmall.lineHeight();
+    labelH = paddingH + max((int16_t)(textH), (int16_t)markerSize) + paddingH;
+    labelY = markerY - (labelH / 2);
+    textY = markerY;
+    labelW = paddingW + markerSize + paddingInnerW + textW + paddingW; // Width is same whether right or left hand variant
+
+    // Left-side variant
+    if (markerX < width() / 2) {
+        labelX = markerX - (markerSize / 2) - paddingW;
+        textX = labelX + paddingW + markerSize + paddingInnerW;
+    }
+
+    // Right-side variant
+    else {
+        labelX = markerX - (markerSize / 2) - paddingInnerW - textW - paddingW;
+        textX = labelX + paddingW;
+    }
+
+    // Backing box
+    fillRect(labelX, labelY, labelW, labelH, WHITE);
+    drawRect(labelX, labelY, labelW, labelH, BLACK);
+
+    // Short name
+    printAt(textX, textY, node->user.short_name, LEFT, MIDDLE);
+
+    // If the label is for our own node,
+    // fade it by overdrawing partially with white
+    if (node == nodeDB->getMeshNode(nodeDB->getNodeNum()))
+        hatchRegion(labelX, labelY, labelW, labelH, 2, WHITE);
+
+    // Draw the marker emblem
+    // - after the fading, because hatching (own node) can align with cross and make it look weird
+    if (tooManyHops)
+        printAt(markerX, markerY, "!", CENTER, MIDDLE);
+    else
+        drawCross(markerX, markerY, markerSize); // The fewer the hops, the larger the marker. Also handles unknownHops
+}
+
+// Check if we actually have enough nodes which would be shown on the map
+// Need at least two, to draw a sensible map
+bool InkHUD::MapApplet::enoughMarkers()
+{
+    uint8_t count = 0;
+    for (uint8_t i = 0; i < nodeDB->getNumMeshNodes(); i++) {
+        meshtastic_NodeInfoLite *node = nodeDB->getMeshNodeByIndex(i);
+
+        // Count nodes
+        if (nodeDB->hasValidPosition(node) && shouldDrawNode(node))
+            count++;
+
+        // We need to find two
+        if (count == 2)
+            return true; // Two nodes is enough for a sensible map
+    }
+
+    return false; // No nodes would be drawn (or just the one, uselessly at 0,0)
+}
+
+// Calculate how far north and east of map center each node is
+// Derived applets can control which nodes to calculate (and later, draw) by overriding MapApplet::shouldDrawNode
+void InkHUD::MapApplet::calculateAllMarkers()
+{
+    // Clear old markers
+    markers.clear();
+
+    // For each node in db
+    for (uint32_t i = 0; i < nodeDB->getNumMeshNodes(); i++) {
+        meshtastic_NodeInfoLite *node = nodeDB->getMeshNodeByIndex(i);
+
+        // Skip if no position
+        if (!nodeDB->hasValidPosition(node))
+            continue;
+
+        // Skip if derived applet doesn't want to show this node on the map
+        if (!shouldDrawNode(node))
+            continue;
+
+        // Skip if our own node
+        // - special handling in render()
+        if (node->num == nodeDB->getNodeNum())
+            continue;
+
+        // Calculate marker and store it
+        markers.push_back(
+            calculateMarker(node->position.latitude_i * 1e-7,  // Lat, converted from Meshtastic's internal int32 style
+                            node->position.longitude_i * 1e-7, // Long, convered from Meshtastic's internal int32 style
+                            node->has_hops_away,               // Is the hopsAway number valid
+                            node->hops_away                    // Hops away
+                            ));
+    }
+}
+
+// Determine the conversion factor between metres, and pixels on screen
+// May be overriden by derived applet, if custom scale required (fixed map size?)
+void InkHUD::MapApplet::calculateMapScale()
+{
+    // Aspect ratio of map and screen
+    // - larger = wide, smaller = tall
+    // - used to set scale, so that widest map dimension fits in applet
+    float mapAspectRatio = (float)widthMeters / heightMeters;
+    float appletAspectRatio = (float)width() / height();
+
+    // "Shrink to fit"
+    // Scale the map so that the largest dimension is fully displayed
+    // Because aspect ratio will be maintained, the other dimension will appear "padded"
+    if (mapAspectRatio > appletAspectRatio)
+        metersToPx = (float)width() / widthMeters; // Too wide for applet. Constrain to fit width.
+    else
+        metersToPx = (float)height() / heightMeters; // Too tall for applet. Constrain to fit height.
+}
+
+// Draw an x, centered on a specific point
+// Most markers will draw with this method
+void InkHUD::MapApplet::drawCross(int16_t x, int16_t y, uint8_t size)
+{
+    int16_t x0 = x - (size / 2);
+    int16_t y0 = y - (size / 2);
+    int16_t x1 = x0 + size - 1;
+    int16_t y1 = y0 + size - 1;
+    drawLine(x0, y0, x1, y1, BLACK);
+    drawLine(x0, y1, x1, y0, BLACK);
+}
+
+#endif

src/graphics/niche/InkHUD/Applets/Bases/Map/MapApplet.h

@@ -0,0 +1,66 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+/*
+
+Base class for Applets which show nodes on a map
+
+Plots position of for a selection of nodes, with north facing up.
+Size of cross represents hops away.
+Our own node is identified with a faded label.
+
+The base applet doesn't handle any events; this is left to the derived applets.
+
+*/
+
+#pragma once
+
+#include "configuration.h"
+
+#include "graphics/niche/InkHUD/Applet.h"
+
+#include "MeshModule.h"
+#include "gps/GeoCoord.h"
+
+namespace NicheGraphics::InkHUD
+{
+
+class MapApplet : public Applet
+{
+  public:
+    void onRender() override;
+
+  protected:
+    virtual bool shouldDrawNode(meshtastic_NodeInfoLite *node) { return true; } // Allow derived applets to filter the nodes
+    virtual void getMapCenter(float *lat, float *lng);
+    virtual void getMapSize(uint32_t *widthMeters, uint32_t *heightMeters);
+
+    bool enoughMarkers();                                  // Anything to draw?
+    void drawLabeledMarker(meshtastic_NodeInfoLite *node); // Highlight a specific marker
+
+  private:
+    // Position of markers to be drawn, relative to map center
+    // HopsAway info used to determine marker size
+    struct Marker {
+        float eastMeters = 0;  // Meters east of mapCenter. Negative if west.
+        float northMeters = 0; // Meters north of mapCenter. Negative if south.
+        bool hasHopsAway = false;
+        uint8_t hopsAway = 0;
+    };
+
+    Marker calculateMarker(float lat, float lng, bool hasHopsAway, uint8_t hopsAway);
+    void calculateAllMarkers();
+    void calculateMapScale();                           // Conversion factor for meters to pixels
+    void drawCross(int16_t x, int16_t y, uint8_t size); // Draw the X used for most markers
+
+    float metersToPx = 0; // Conversion factor for meters to pixels
+    float latCenter = 0;  // Map center: latitude
+    float lngCenter = 0;  // Map center: longitude
+
+    std::list<Marker> markers;
+    uint32_t widthMeters = 0;  // Map width: meters
+    uint32_t heightMeters = 0; // Map height: meters
+};
+
+} // namespace NicheGraphics::InkHUD
+
+#endif

src/graphics/niche/InkHUD/Applets/Bases/NodeList/NodeListApplet.cpp

@@ -0,0 +1,283 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+#include "RTC.h"
+
+#include "GeoCoord.h"
+#include "NodeDB.h"
+
+#include "./NodeListApplet.h"
+
+using namespace NicheGraphics;
+
+InkHUD::NodeListApplet::NodeListApplet(const char *name) : MeshModule(name)
+{
+    // We only need to be promiscuous in order to hear NodeInfo, apparently. See NodeInfoModule
+    // For all other packets, we manually reimplement isPromiscuous=false in wantPacket
+    MeshModule::isPromiscuous = true;
+}
+
+// Do we want to process this packet with handleReceived()?
+bool InkHUD::NodeListApplet::wantPacket(const meshtastic_MeshPacket *p)
+{
+    // Only interested if:
+    return isActive()                                                  // Applet is active
+           && !isFromUs(p)                                             // Packet is incoming (not outgoing)
+           && (isToUs(p) || isBroadcast(p->to) ||                      // Either: intended for us,
+               p->decoded.portnum == meshtastic_PortNum_NODEINFO_APP); // or nodeinfo
+
+    // Note: special handling of NodeInfo is to match NodeInfoModule
+    // To match the behavior seen in the client apps:
+    // - NodeInfoModule's ProtoBufModule base is "promiscuous"
+    // - All other activity is *not* promiscuous
+    // To achieve this, our MeshModule *is* promiscious, and we're manually reimplementing non-promiscuous behavior here,
+    // to match the code in MeshModule::callModules
+}
+
+// MeshModule packets arrive here
+// Extract the info and pass it to the derived applet
+// Derived applet will store the CardInfo and perform any required sorting of the CardInfo collection
+// Derived applet might also need to keep other tallies (active nodes count?)
+ProcessMessage InkHUD::NodeListApplet::handleReceived(const meshtastic_MeshPacket &mp)
+{
+    // Abort if applet fully deactivated
+    // Already handled by wantPacket in this case, but good practice for all applets, as some *do* require this early return
+    if (!isActive())
+        return ProcessMessage::CONTINUE;
+
+    // Assemble info: from this event
+    CardInfo c;
+    c.nodeNum = mp.from;
+    c.signal = getSignalStrength(mp.rx_snr, mp.rx_rssi);
+
+    // Assemble info: from nodeDB (needed to detect changes)
+    meshtastic_NodeInfoLite *node = nodeDB->getMeshNode(c.nodeNum);
+    meshtastic_NodeInfoLite *ourNode = nodeDB->getMeshNode(nodeDB->getNodeNum());
+    if (node) {
+        if (node->has_hops_away)
+            c.hopsAway = node->hops_away;
+
+        if (nodeDB->hasValidPosition(node) && nodeDB->hasValidPosition(ourNode)) {
+            // Get lat and long as float
+            // Meshtastic stores these as integers internally
+            float ourLat = ourNode->position.latitude_i * 1e-7;
+            float ourLong = ourNode->position.longitude_i * 1e-7;
+            float theirLat = node->position.latitude_i * 1e-7;
+            float theirLong = node->position.longitude_i * 1e-7;
+
+            c.distanceMeters = (int32_t)GeoCoord::latLongToMeter(theirLat, theirLong, ourLat, ourLong);
+        }
+    }
+
+    // Pass to the derived applet
+    // Derived applet is responsible for requesting update, if justified
+    // That request will eventually trigger our class' onRender method
+    handleParsed(c);
+
+    return ProcessMessage::CONTINUE; // Let others look at this message also if they want
+}
+
+// Maximum number of cards we may ever need to render, in our tallest layout config
+// May be slightly in excess of the true value: header not accounted for
+uint8_t InkHUD::NodeListApplet::maxCards()
+{
+    // Cache result. Shouldn't change during execution
+    static uint8_t cards = 0;
+
+    if (!cards) {
+        const uint16_t height = Tile::maxDisplayDimension();
+
+        // Use a loop instead of arithmetic, because it's easier for my brain to follow
+        // Add cards one by one, until the latest card (without margin) extends below screen
+
+        uint16_t y = cardH; // First card: no margin above
+        cards = 1;
+
+        while (y < height) {
+            y += cardMarginH;
+            y += cardH;
+            cards++;
+        }
+    }
+
+    return cards;
+}
+
+// Draw using info which derived applet placed into NodeListApplet::cards for us
+void InkHUD::NodeListApplet::onRender()
+{
+
+    // ================================
+    // Draw the standard applet header
+    // ================================
+
+    drawHeader(getHeaderText()); // Ask derived applet for the title
+
+    // Dimensions of the header
+    int16_t headerDivY = getHeaderHeight() - 1;
+    constexpr uint16_t padDivH = 2;
+
+    // ========================
+    // Draw the main node list
+    // ========================
+
+    // const uint8_t cardMarginH = fontSmall.lineHeight() / 2; // Gap between cards
+    // const uint16_t cardH = fontLarge.lineHeight() + fontSmall.lineHeight() + cardMarginH;
+
+    // Imaginary vertical line dividing left-side and right-side info
+    // Long-name will crop here
+    const uint16_t dividerX = (width() - 1) - getTextWidth("X Hops");
+
+    // Y value (top) of the current card. Increases as we draw.
+    uint16_t cardTopY = headerDivY + padDivH;
+
+    // -- Each node in list --
+    for (auto card = cards.begin(); card != cards.end(); ++card) {
+
+        // Gather info
+        // ========================================
+        NodeNum &nodeNum = card->nodeNum;
+        SignalStrength &signal = card->signal;
+        std::string longName;  // handled below
+        std::string shortName; // handled below
+        std::string distance;  // handled below;
+        uint8_t &hopsAway = card->hopsAway;
+
+        meshtastic_NodeInfoLite *node = nodeDB->getMeshNode(nodeNum);
+
+        // -- Shortname --
+        // use "?" if unknown
+        if (node && node->has_user)
+            shortName = node->user.short_name;
+        else
+            shortName = "?";
+
+        // -- Longname --
+        // use node id if unknown
+        if (node && node->has_user)
+            longName = node->user.long_name; // Found in nodeDB
+        else {
+            // Not found in nodeDB, show a hex nodeid instead
+            longName = hexifyNodeNum(nodeNum);
+        }
+
+        // -- Distance --
+        if (card->distanceMeters != CardInfo::DISTANCE_UNKNOWN)
+            distance = localizeDistance(card->distanceMeters);
+
+        // Draw the info
+        // ====================================
+
+        // Define two lines of text for the card
+        // We will center our text on these lines
+        uint16_t lineAY = cardTopY + (fontLarge.lineHeight() / 2);
+        uint16_t lineBY = cardTopY + fontLarge.lineHeight() + (fontSmall.lineHeight() / 2);
+
+        // Print the short name
+        setFont(fontLarge);
+        printAt(0, lineAY, shortName, LEFT, MIDDLE);
+
+        // Print the distance
+        setFont(fontSmall);
+        printAt(width() - 1, lineBY, distance, RIGHT, MIDDLE);
+
+        // If we have a direct connection to the node, draw the signal indicator
+        if (hopsAway == 0 && signal != SIGNAL_UNKNOWN) {
+            uint16_t signalW = getTextWidth("Xkm"); // Indicator should be similar width to distance label
+            uint16_t signalH = fontLarge.lineHeight() * 0.75;
+            int16_t signalY = lineAY + (fontLarge.lineHeight() / 2) - (fontLarge.lineHeight() * 0.75);
+            int16_t signalX = width() - signalW;
+            drawSignalIndicator(signalX, signalY, signalW, signalH, signal);
+        }
+        // Otherwise, print "hops away" info, if available
+        else if (hopsAway != CardInfo::HOPS_UNKNOWN) {
+            std::string hopString = to_string(node->hops_away);
+            hopString += " Hop";
+            if (node->hops_away != 1)
+                hopString += "s"; // Append s for "Hops", rather than "Hop"
+
+            printAt(width() - 1, lineAY, hopString, RIGHT, MIDDLE);
+        }
+
+        // Print the long name, cropping to prevent overflow onto the right-side info
+        setCrop(0, 0, dividerX - 1, height());
+        printAt(0, lineBY, longName, LEFT, MIDDLE);
+
+        // GFX effect: "hatch" the right edge of longName area
+        // If a longName has been cropped, it will appear to fade out,
+        // creating a soft barrier with the right-side info
+        const int16_t hatchLeft = dividerX - 1 - (fontSmall.lineHeight());
+        const int16_t hatchWidth = fontSmall.lineHeight();
+        hatchRegion(hatchLeft, cardTopY, hatchWidth, cardH, 2, WHITE);
+
+        // Prepare to draw the next card
+        resetCrop();
+        cardTopY += cardH;
+
+        // Once we've run out of screen, stop drawing cards
+        // Depending on tiles / rotation, this may be before we hit maxCards
+        if (cardTopY > height()) {
+            break;
+        }
+    }
+}
+
+// Draw element: a "mobile phone" style signal indicator
+// We will calculate values as floats, then "rasterize" at the last moment, relative to x and w, etc
+// This prevents issues with premature rounding when rendering tiny elements
+void InkHUD::NodeListApplet::drawSignalIndicator(int16_t x, int16_t y, uint16_t w, uint16_t h, SignalStrength strength)
+{
+
+    /*
+    +-------------------------------------------+
+    |                                           |
+    |                                           |
+    |                                  barHeightRelative=1.0
+    |                                  +--+ ^   |
+    |        gutterW          +--+     |  | |   |
+    |          <-->  +--+     |  |     |  | |   |
+    |     +--+       |  |     |  |     |  | |   |
+    |     |  |       |  |     |  |     |  | |   |
+    | <-> +--+       +--+     +--+     +--+ v   |
+    | paddingW             ^                    |
+    |             paddingH |                    |
+    |                      v                    |
+    +-------------------------------------------+
+    */
+
+    constexpr float paddingW = 0.1; // Either side
+    constexpr float paddingH = 0.1; // Above and below
+    constexpr float gutterX = 0.1;  // Between bars
+
+    constexpr float barHRel[] = {0.3, 0.5, 0.7, 1.0}; // Heights of the signal bars, relative to the talleest
+    constexpr uint8_t barCount = 4; // How many bars we draw. Reference only: changing value won't change the count.
+
+    // Dynamically calculate the width of the bars, and height of the rightmost, relative to other dimensions
+    float barW = (1.0 - (paddingW + ((barCount - 1) * gutterX) + paddingW)) / barCount;
+    float barHMax = 1.0 - (paddingH + paddingH);
+
+    // Draw signal bar rectangles, then placeholder lines once strength reached
+    for (uint8_t i = 0; i < barCount; i++) {
+        // Co-ords for this specific bar
+        float barH = barHMax * barHRel[i];
+        float barX = paddingW + (i * (gutterX + barW));
+        float barY = paddingH + (barHMax - barH);
+
+        // Rasterize to px coords at the last moment
+        int16_t rX = (x + (w * barX)) + 0.5;
+        int16_t rY = (y + (h * barY)) + 0.5;
+        uint16_t rW = (w * barW) + 0.5;
+        uint16_t rH = (h * barH) + 0.5;
+
+        // Draw signal bars, until we are displaying the correct "signal strength", then just draw placeholder lines
+        if (i <= strength)
+            drawRect(rX, rY, rW, rH, BLACK);
+        else {
+            // Just draw a placeholder line
+            float lineY = barY + barH;
+            uint16_t rLineY = (y + (h * lineY)) + 0.5; // Rasterize
+            drawLine(rX, rLineY, rX + rW - 1, rLineY, BLACK);
+        }
+    }
+}
+
+#endif

src/graphics/niche/InkHUD/Applets/Bases/NodeList/NodeListApplet.h

@@ -0,0 +1,71 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+/*
+
+Base class for Applets which display a list of nodes
+Used by the "Recents" and "Heard" applets. Possibly more in future?
+
+    +-------------------------------+
+    |                            |  |
+    |  SHRT                  . | |  |
+    |  Long name              50km  |
+    |                               |
+    |  ABCD                 2 Hops  |
+    |  abcdedfghijk           30km  |
+    |                               |
+    +-------------------------------+
+
+*/
+
+#pragma once
+
+#include "configuration.h"
+
+#include "graphics/niche/InkHUD/Applet.h"
+
+namespace NicheGraphics::InkHUD
+{
+
+class NodeListApplet : public Applet, public MeshModule
+{
+  protected:
+    // Info used to draw one card to the node list
+    struct CardInfo {
+        static constexpr uint8_t HOPS_UNKNOWN = -1;
+        static constexpr uint32_t DISTANCE_UNKNOWN = -1;
+
+        NodeNum nodeNum = 0;
+        SignalStrength signal = SignalStrength::SIGNAL_UNKNOWN;
+        uint32_t distanceMeters = DISTANCE_UNKNOWN;
+        uint8_t hopsAway = HOPS_UNKNOWN; // Unknown
+    };
+
+  public:
+    NodeListApplet(const char *name);
+    void onRender() override;
+
+    // MeshModule overrides
+    virtual bool wantPacket(const meshtastic_MeshPacket *p) override;
+    virtual ProcessMessage handleReceived(const meshtastic_MeshPacket &mp) override;
+
+  protected:
+    virtual void handleParsed(CardInfo c) = 0; // Pass extracted info from a new packet to derived class, for sorting and storage
+    virtual std::string getHeaderText() = 0;   // Title for the applet's header. Todo: get this info another way?
+
+    uint8_t maxCards(); // Calculate the maximum number of cards an applet could ever display
+
+    std::deque<CardInfo> cards; // Derived applet places cards here, for this base applet to render
+
+  private:
+    // UI element: a "mobile phone" style signal indicator
+    void drawSignalIndicator(int16_t x, int16_t y, uint16_t w, uint16_t h, SignalStrength signal);
+
+    // Dimensions for drawing
+    // Used for render, and also for maxCards calc
+    const uint8_t cardMarginH = fontSmall.lineHeight() / 2;                               // Gap between cards
+    const uint16_t cardH = fontLarge.lineHeight() + fontSmall.lineHeight() + cardMarginH; // Height of card
+};
+
+} // namespace NicheGraphics::InkHUD
+
+#endif

src/graphics/niche/InkHUD/Applets/Examples/BasicExample/BasicExampleApplet.cpp

@@ -0,0 +1,14 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+#include "./BasicExampleApplet.h"
+
+using namespace NicheGraphics;
+
+// All drawing happens here
+// Our basic example doesn't do anything useful. It just passively prints some text.
+void InkHUD::BasicExampleApplet::onRender()
+{
+    print("Hello, World!");
+}
+
+#endif

src/graphics/niche/InkHUD/Applets/Examples/BasicExample/BasicExampleApplet.h

@@ -0,0 +1,36 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+/*
+
+A bare-minimum example of an InkHUD applet.
+Only prints Hello World.
+
+In variants/<your device>/nicheGraphics.h:
+
+    - include this .h file
+    - add the following line of code:
+        windowManager->addApplet("Basic", new InkHUD::BasicExampleApplet);
+
+*/
+
+#pragma once
+
+#include "configuration.h"
+
+#include "graphics/niche/InkHUD/Applet.h"
+
+namespace NicheGraphics::InkHUD
+{
+
+class BasicExampleApplet : public Applet
+{
+  public:
+    // You must have an onRender() method
+    // All drawing happens here
+
+    void onRender() override;
+};
+
+} // namespace NicheGraphics::InkHUD
+
+#endif

src/graphics/niche/InkHUD/Applets/Examples/NewMsgExample/NewMsgExampleApplet.cpp

@@ -0,0 +1,54 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+#include "./NewMsgExampleApplet.h"
+
+using namespace NicheGraphics;
+
+// We configured MeshModule API to call this method when we receive a new text message
+ProcessMessage InkHUD::NewMsgExampleApplet::handleReceived(const meshtastic_MeshPacket &mp)
+{
+
+    // Abort if applet fully deactivated
+    if (!isActive())
+        return ProcessMessage::CONTINUE;
+
+    // Check that this is an incoming message
+    // Outgoing messages (sent by us) will also call handleReceived
+
+    if (!isFromUs(&mp)) {
+        // Store the sender's nodenum
+        // We need to keep this information, so we can re-use it anytime render() is called
+        haveMessage = true;
+        fromWho = mp.from;
+
+        // Tell InkHUD that we have something new to show on the screen
+        requestUpdate();
+    }
+
+    // Tell MeshModule API to continue informing other firmware components about this message
+    // We're not the only component which is interested in new text messages
+    return ProcessMessage::CONTINUE;
+}
+
+// All drawing happens here
+// We can trigger a render by calling requestUpdate()
+// Render might be called by some external source
+// We should always be ready to draw
+void InkHUD::NewMsgExampleApplet::onRender()
+{
+    setFont(fontSmall);
+
+    printAt(0, 0, "Example: NewMsg", LEFT, TOP); // Print top-left corner of text at (0,0)
+
+    int16_t centerX = X(0.5); // Same as width() / 2
+    int16_t centerY = Y(0.5); // Same as height() / 2
+
+    if (haveMessage) {
+        printAt(centerX, centerY, "New Message", CENTER, BOTTOM);
+        printAt(centerX, centerY, "From: " + hexifyNodeNum(fromWho), CENTER, TOP);
+    } else {
+        printAt(centerX, centerY, "No Message", CENTER, MIDDLE); // Place center of string at (centerX, centerY)
+    }
+}
+
+#endif

src/graphics/niche/InkHUD/Applets/Examples/NewMsgExample/NewMsgExampleApplet.h

@@ -0,0 +1,61 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+/*
+
+An example of an InkHUD applet.
+Tells us when a new text message arrives.
+
+This applet makes use of the MeshModule API to detect new messages,
+which is a general part of the Meshtastic firmware, and not part of InkHUD.
+
+In variants/<your device>/nicheGraphics.h:
+
+    - include this .h file
+    - add the following line of code:
+        windowManager->addApplet("New Msg", new InkHUD::NewMsgExampleApplet);
+
+*/
+
+#pragma once
+
+#include "configuration.h"
+
+#include "graphics/niche/InkHUD/Applet.h"
+
+#include "mesh/SinglePortModule.h"
+
+namespace NicheGraphics::InkHUD
+{
+
+class NewMsgExampleApplet : public Applet, public SinglePortModule
+{
+  public:
+    // The MeshModule API requires us to have a constructor, to specify that we're interested in Text Messages.
+    NewMsgExampleApplet() : SinglePortModule("NewMsgExampleApplet", meshtastic_PortNum_TEXT_MESSAGE_APP) {}
+
+    // All drawing happens here
+    void onRender() override;
+
+    // Your applet might also want to use some of these
+    // Useful for setting up or tidying up
+
+    /*
+    void onActivate();   // When started
+    void onDeactivate(); // When stopped
+    void onForeground(); // When shown by short-press
+    void onBackground(); // When hidden by short-press
+    */
+
+  private:
+    // Called when we receive new text messages
+    // Part of the MeshModule API
+    ProcessMessage handleReceived(const meshtastic_MeshPacket &mp) override;
+
+    // Store info from handleReceived
+    bool haveMessage = false;
+    NodeNum fromWho;
+};
+
+} // namespace NicheGraphics::InkHUD
+
+#endif

src/graphics/niche/InkHUD/Applets/System/BatteryIcon/BatteryIconApplet.cpp

@@ -0,0 +1,107 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+#include "./BatteryIconApplet.h"
+
+using namespace NicheGraphics;
+
+void InkHUD::BatteryIconApplet::onActivate()
+{
+    // Show at boot, if user has previously enabled the feature
+    if (settings.optionalFeatures.batteryIcon)
+        bringToForeground();
+
+    // Register to our have BatteryIconApplet::onPowerStatusUpdate method called when new power info is available
+    // This happens whether or not the battery icon feature is enabled
+    powerStatusObserver.observe(&powerStatus->onNewStatus);
+}
+
+void InkHUD::BatteryIconApplet::onDeactivate()
+{
+    // Stop having onPowerStatusUpdate called
+    powerStatusObserver.unobserve(&powerStatus->onNewStatus);
+}
+
+// We handle power status' even when the feature is disabled,
+// so that we have up to date data ready if the feature is enabled later.
+// Otherwise could be 30s before new status update, with weird battery value displayed
+int InkHUD::BatteryIconApplet::onPowerStatusUpdate(const meshtastic::Status *status)
+{
+    // System applets are always active
+    assert(isActive());
+
+    // This method should only receive power statuses
+    // If we get a different type of status, something has gone weird elsewhere
+    assert(status->getStatusType() == STATUS_TYPE_POWER);
+
+    meshtastic::PowerStatus *powerStatus = (meshtastic::PowerStatus *)status;
+
+    // Get the new state of charge %, and round to the nearest 10%
+    uint8_t newSocRounded = ((powerStatus->getBatteryChargePercent() + 5) / 10) * 10;
+
+    // If rounded value has changed, trigger a display update
+    // It's okay to requestUpdate before we store the new value, as the update won't run until next loop()
+    // Don't trigger an update if the feature is disabled
+    if (this->socRounded != newSocRounded && settings.optionalFeatures.batteryIcon)
+        requestUpdate();
+
+    // Store the new value
+    this->socRounded = newSocRounded;
+
+    return 0; // Tell Observable to continue informing other observers
+}
+
+void InkHUD::BatteryIconApplet::onRender()
+{
+    // Fill entire tile
+    // - size of icon controlled by size of tile
+    int16_t l = 0;
+    int16_t t = 0;
+    uint16_t w = width();
+    int16_t h = height();
+
+    // Clear the region beneath the tile
+    // Most applets are drawing onto an empty frame buffer and don't need to do this
+    // We do need to do this with the battery though, as it is an "overlay"
+    fillRect(l, t, w, h, WHITE);
+
+    // Vertical centerline
+    const int16_t m = t + (h / 2);
+
+    // =====================
+    // Draw battery outline
+    // =====================
+
+    // Positive terminal "bump"
+    const int16_t &bumpL = l;
+    const uint16_t bumpH = h / 2;
+    const int16_t bumpT = m - (bumpH / 2);
+    constexpr uint16_t bumpW = 2;
+    fillRect(bumpL, bumpT, bumpW, bumpH, BLACK);
+
+    // Main body of battery
+    const int16_t bodyL = bumpL + bumpW;
+    const int16_t &bodyT = t;
+    const int16_t &bodyH = h;
+    const int16_t bodyW = w - bumpW;
+    drawRect(bodyL, bodyT, bodyW, bodyH, BLACK);
+
+    // Erase join between bump and body
+    drawLine(bodyL, bumpT, bodyL, bumpT + bumpH - 1, WHITE);
+
+    // ===================
+    // Draw battery level
+    // ===================
+
+    constexpr int16_t slicePad = 2;
+    const int16_t sliceL = bodyL + slicePad;
+    const int16_t sliceT = bodyT + slicePad;
+    const uint16_t sliceH = bodyH - (slicePad * 2);
+    uint16_t sliceW = bodyW - (slicePad * 2);
+
+    sliceW = (sliceW * socRounded) / 100; // Apply percentage
+
+    hatchRegion(sliceL, sliceT, sliceW, sliceH, 2, BLACK);
+    drawRect(sliceL, sliceT, sliceW, sliceH, BLACK);
+}
+
+#endif

src/graphics/niche/InkHUD/Applets/System/BatteryIcon/BatteryIconApplet.h

@@ -0,0 +1,41 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+/*
+
+This applet floats top-left, giving a graphical representation of battery remaining
+It should be optional, enabled by the on-screen menu
+
+*/
+
+#pragma once
+
+#include "configuration.h"
+
+#include "graphics/niche/InkHUD/Applet.h"
+
+#include "PowerStatus.h"
+
+namespace NicheGraphics::InkHUD
+{
+
+class BatteryIconApplet : public Applet
+{
+  public:
+    void onRender() override;
+
+    void onActivate() override;
+    void onDeactivate() override;
+
+    int onPowerStatusUpdate(const meshtastic::Status *status); // Called when new info about battery is available
+
+  protected:
+    // Get informed when new information about the battery is available (via onPowerStatusUpdate method)
+    CallbackObserver<BatteryIconApplet, const meshtastic::Status *> powerStatusObserver =
+        CallbackObserver<BatteryIconApplet, const meshtastic::Status *>(this, &BatteryIconApplet::onPowerStatusUpdate);
+
+    uint8_t socRounded = 0; // Battery state of charge, rounded to nearest 10%
+};
+
+} // namespace NicheGraphics::InkHUD
+
+#endif

src/graphics/niche/InkHUD/Applets/System/Logo/LogoApplet.cpp

@@ -0,0 +1,108 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+#include "./LogoApplet.h"
+
+using namespace NicheGraphics;
+
+InkHUD::LogoApplet::LogoApplet() : concurrency::OSThread("LogoApplet")
+{
+    // Don't autostart the runOnce() timer
+    OSThread::disable();
+
+    // Grab the WindowManager singleton, for convenience
+    windowManager = WindowManager::getInstance();
+}
+
+void InkHUD::LogoApplet::onRender()
+{
+    // Size  of the region which the logo should "scale to fit"
+    uint16_t logoWLimit = X(0.8);
+    uint16_t logoHLimit = Y(0.5);
+
+    // Get the max width and height we can manage within the region, while still maintaining aspect ratio
+    uint16_t logoW = getLogoWidth(logoWLimit, logoHLimit);
+    uint16_t logoH = getLogoHeight(logoWLimit, logoHLimit);
+
+    // Where to place the center of the logo
+    int16_t logoCX = X(0.5);
+    int16_t logoCY = Y(0.5 - 0.05);
+
+    drawLogo(logoCX, logoCY, logoW, logoH);
+
+    if (!textLeft.empty()) {
+        setFont(fontSmall);
+        printAt(0, 0, textLeft, LEFT, TOP);
+    }
+
+    if (!textRight.empty()) {
+        setFont(fontSmall);
+        printAt(X(1), 0, textRight, RIGHT, TOP);
+    }
+
+    if (!textTitle.empty()) {
+        int16_t logoB = logoCY + (logoH / 2); // Bottom of the logo
+        setFont(fontTitle);
+        printAt(X(0.5), logoB + Y(0.1), textTitle, CENTER, TOP);
+    }
+}
+
+void InkHUD::LogoApplet::onForeground()
+{
+    // If another applet has locked the display, ask it to exit
+    Applet *other = windowManager->whoLocked();
+    if (other != nullptr)
+        other->sendToBackground();
+
+    windowManager->claimFullscreen(this); // Take ownership of fullscreen tile
+    windowManager->lock(this);            // Prevent other applets from requesting updates
+}
+
+void InkHUD::LogoApplet::onBackground()
+{
+    OSThread::disable(); // Disable auto-dismiss timer, in case applet was dismissed early (sendToBackground from outside class)
+
+    windowManager->releaseFullscreen(); // Relinquish ownership of fullscreen tile
+    windowManager->unlock(this);        // Allow normal user applet update requests to resume
+
+    // Need to force an update, as a polite request wouldn't be honored, seeing how we are now in the background
+    // Usually, onBackground is followed by another applet's onForeground (which requests update), but not in this case
+    windowManager->forceUpdate(EInk::UpdateTypes::FULL);
+}
+
+int32_t InkHUD::LogoApplet::runOnce()
+{
+    LOG_DEBUG("Sent to background by timer");
+    sendToBackground();
+    return OSThread::disable();
+}
+
+// Begin displaying the screen which is shown at startup
+// Suggest EInk::await after calling this method
+void InkHUD::LogoApplet::showBootScreen()
+{
+    OSThread::setIntervalFromNow(8 * 1000UL);
+    OSThread::enabled = true;
+
+    textLeft = "";
+    textRight = "";
+    textTitle = xstr(APP_VERSION_SHORT);
+    fontTitle = fontSmall;
+
+    bringToForeground();
+    requestUpdate(Drivers::EInk::UpdateTypes::FULL); // Already requested, just upgrading to FULL
+}
+
+// Begin displaying the screen which is shown at shutdown
+// Needs EInk::await after calling this method, to ensure display updates before shutdown
+void InkHUD::LogoApplet::showShutdownScreen()
+{
+    textLeft = "";
+    textRight = "";
+    textTitle = owner.short_name;
+    fontTitle = fontLarge;
+
+    bringToForeground();
+    requestUpdate(Drivers::EInk::UpdateTypes::FULL); // Already requested, just upgrading to FULL
+}
+
+#endif

src/graphics/niche/InkHUD/Applets/System/Logo/LogoApplet.h

@@ -0,0 +1,47 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+/*
+
+    Shows the Meshtastic logo fullscreen, with accompanying text
+    Used for boot and shutdown
+
+*/
+
+#pragma once
+
+#include "configuration.h"
+
+#include "concurrency/OSThread.h"
+#include "graphics/niche/InkHUD/Applet.h"
+
+namespace NicheGraphics::InkHUD
+{
+
+class LogoApplet : public Applet, public concurrency::OSThread
+{
+  public:
+    LogoApplet();
+    void onRender() override;
+    void onForeground() override;
+    void onBackground() override;
+
+    // Note: interacting directly with an applet like this is non-standard
+    // Only permitted because this is a "system applet", which has special behavior and interacts directly with WindowManager
+
+    void showBootScreen();
+    void showShutdownScreen();
+
+  protected:
+    int32_t runOnce() override;
+
+    std::string textLeft;
+    std::string textRight;
+    std::string textTitle;
+    AppletFont fontTitle;
+
+    WindowManager *windowManager = nullptr; // For convenience
+};
+
+} // namespace NicheGraphics::InkHUD
+
+#endif

src/graphics/niche/InkHUD/Applets/System/Menu/MenuAction.h

@@ -0,0 +1,38 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+/*
+
+Set of end-point actions for the Menu Applet
+
+Added as menu entries in MenuApplet::showPage
+Behaviors assigned in MenuApplet::execute
+
+*/
+
+#pragma once
+
+#include "configuration.h"
+
+namespace NicheGraphics::InkHUD
+{
+
+enum MenuAction {
+    NO_ACTION,
+    SEND_NODEINFO,
+    SEND_POSITION,
+    SHUTDOWN,
+    NEXT_TILE,
+    TOGGLE_APPLET,
+    ACTIVATE_APPLETS, // Todo: remove? Possible redundant, handled by TOGGLE_APPLET?
+    TOGGLE_AUTOSHOW_APPLET,
+    SET_RECENTS,
+    ROTATE,
+    LAYOUT,
+    TOGGLE_BATTERY_ICON,
+    TOGGLE_NOTIFICATIONS,
+    TOGGLE_BACKLIGHT,
+};
+
+} // namespace NicheGraphics::InkHUD
+
+#endif

src/graphics/niche/InkHUD/Applets/System/Menu/MenuApplet.cpp

@@ -0,0 +1,612 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+#include "./MenuApplet.h"
+
+#include "PowerStatus.h"
+#include "RTC.h"
+
+using namespace NicheGraphics;
+
+static constexpr uint8_t MENU_TIMEOUT_SEC = 60; // How many seconds before menu auto-closes
+
+// Options for the "Recents" menu
+// These are offered to users as possible values for settings.recentlyActiveSeconds
+static constexpr uint8_t RECENTS_OPTIONS_MINUTES[] = {2, 5, 10, 30, 60, 120};
+
+InkHUD::MenuApplet::MenuApplet() : concurrency::OSThread("MenuApplet")
+{
+    // No timer tasks at boot
+    OSThread::disable();
+}
+
+void InkHUD::MenuApplet::onActivate()
+{
+    // Grab pointers to some singleton components which the menu interacts with
+    // We could do this every time we needed them, in place,
+    // but this just makes the code tidier
+
+    this->windowManager = WindowManager::getInstance();
+
+    // Note: don't get instance if we're not actually using the backlight,
+    // or else you will unintentionally instantiate it
+    if (settings.optionalMenuItems.backlight) {
+        backlight = Drivers::LatchingBacklight::getInstance();
+    }
+}
+
+void InkHUD::MenuApplet::onForeground()
+{
+    // We do need this before we render, but we can optimize by just calculating it once now
+    systemInfoPanelHeight = getSystemInfoPanelHeight();
+
+    // Display initial menu page
+    showPage(MenuPage::ROOT);
+
+    // If device has a backlight which isn't controlled by aux button:
+    // backlight on always when menu opens.
+    // Courtesy to T-Echo users who removed the capacitive touch button
+    if (settings.optionalMenuItems.backlight) {
+        assert(backlight);
+        if (!backlight->isOn())
+            backlight->peek();
+    }
+
+    // Prevent user applets requested update while menu is open
+    windowManager->lock(this);
+
+    // Begin the auto-close timeout
+    OSThread::setIntervalFromNow(MENU_TIMEOUT_SEC * 1000UL);
+    OSThread::enabled = true;
+
+    // Upgrade the refresh to FAST, for guaranteed responsiveness
+    windowManager->forceUpdate(EInk::UpdateTypes::FAST);
+}
+
+void InkHUD::MenuApplet::onBackground()
+{
+    // If device has a backlight which isn't controlled by aux button:
+    // Item in options submenu allows keeping backlight on after menu is closed
+    // If this item is deselected we will turn backlight off again, now that menu is closing
+    if (settings.optionalMenuItems.backlight) {
+        assert(backlight);
+        if (!backlight->isLatched())
+            backlight->off();
+    }
+
+    // Stop the auto-timeout
+    OSThread::disable();
+
+    // Resume normal rendering and button behavior of user applets
+    windowManager->unlock(this);
+
+    // Restore the user applet whose tile we borrowed
+    if (borrowedTileOwner)
+        borrowedTileOwner->bringToForeground();
+    Tile *t = getTile();
+    t->assignApplet(borrowedTileOwner); // Break our link with the tile, (and relink it with real owner, if it had one)
+    borrowedTileOwner = nullptr;
+
+    // Need to force an update, as a polite request wouldn't be honored, seeing how we are now in the background
+    // We're only updating here to ugrade from UNSPECIFIED to FAST, to ensure responsiveness when exiting menu
+    windowManager->forceUpdate(EInk::UpdateTypes::FAST);
+}
+
+// Open the menu
+// Parameter specifies which user-tile the menu will use
+// The user applet originally on this tile will be restored when the menu closes
+void InkHUD::MenuApplet::show(Tile *t)
+{
+    // Remember who *really* owns this tile
+    borrowedTileOwner = t->getAssignedApplet();
+
+    // Hide the owner, if it is a valid applet
+    if (borrowedTileOwner)
+        borrowedTileOwner->sendToBackground();
+
+    // Break the owner's link with tile
+    // Relink it to menu applet
+    t->assignApplet(this);
+
+    // Show menu
+    bringToForeground();
+}
+
+// Auto-exit the menu applet after a period of inactivity
+// The values shown on the root menu are only a snapshot: they are not re-rendered while the menu remains open.
+// By exiting the menu, we prevent users mistakenly believing that the data will update.
+int32_t InkHUD::MenuApplet::runOnce()
+{
+    // runOnce's interval is pushed back when a button is pressed
+    // If we do actually run, it means no button input occurred within MENU_TIMEOUT_SEC,
+    // so we close the menu.
+    showPage(EXIT);
+
+    // Timer should disable after firing
+    // This is redundant, as onBackground() will also disable
+    return OSThread::disable();
+}
+
+// Perform action for a menu item, then change page
+// Behaviors for MenuActions are defined here
+void InkHUD::MenuApplet::execute(MenuItem item)
+{
+    // Perform an action
+    // ------------------
+    switch (item.action) {
+
+    // Open a submenu without performing any action
+    // Also handles exit
+    case NO_ACTION:
+        break;
+
+    case NEXT_TILE:
+        // Note performed manually;
+        // WindowManager::nextTile is raised by aux button press only, and will interact poorly with the menu
+        settings.userTiles.focused = (settings.userTiles.focused + 1) % settings.userTiles.count;
+        windowManager->changeLayout();
+        cursor = 0; // No menu item selected, for quick exit after tile swap
+        cursorShown = false;
+        break;
+
+    case ROTATE:
+        settings.rotation = (settings.rotation + 1) % 4;
+        windowManager->changeLayout();
+        // requestUpdate(Drivers::EInk::UpdateTypes::FULL); // Would update regardless; just selecting FULL
+        break;
+
+    case LAYOUT:
+        // Todo: smarter incrementing of tile count
+        settings.userTiles.count++;
+
+        if (settings.userTiles.count == 3) // Skip 3 tiles: not done yet
+            settings.userTiles.count++;
+
+        if (settings.userTiles.count > settings.userTiles.maxCount) // Loop around if tile count now too high
+            settings.userTiles.count = 1;
+
+        windowManager->changeLayout();
+        // requestUpdate(Drivers::EInk::UpdateTypes::FULL); // Would update regardless; just selecting FULL
+        break;
+
+    case TOGGLE_APPLET:
+        settings.userApplets.active[cursor] = !settings.userApplets.active[cursor];
+        windowManager->changeActivatedApplets();
+        // requestUpdate(Drivers::EInk::UpdateTypes::FULL); // Select FULL, seeing how this action doesn't auto exit
+        break;
+
+    case ACTIVATE_APPLETS:
+        // Todo: remove this action? Already handled by TOGGLE_APPLET?
+        windowManager->changeActivatedApplets();
+        break;
+
+    case TOGGLE_AUTOSHOW_APPLET:
+        // Toggle settings.userApplets.autoshow[] value, via MenuItem::checkState pointer set in populateAutoshowPage()
+        *items.at(cursor).checkState = !(*items.at(cursor).checkState);
+        break;
+
+    case TOGGLE_NOTIFICATIONS:
+        settings.optionalFeatures.notifications = !settings.optionalFeatures.notifications;
+        break;
+
+    case SET_RECENTS:
+        // Set value of settings.recentlyActiveSeconds
+        // Uses menu cursor to read RECENTS_OPTIONS_MINUTES array (defined at top of this file)
+        assert(cursor < sizeof(RECENTS_OPTIONS_MINUTES) / sizeof(RECENTS_OPTIONS_MINUTES[0]));
+        settings.recentlyActiveSeconds = RECENTS_OPTIONS_MINUTES[cursor] * 60; // Menu items are in minutes
+        break;
+
+    case SHUTDOWN:
+        LOG_INFO("Shutting down from menu");
+        power->shutdown();
+        // Menu is then sent to background via onShutdown
+        break;
+
+    case TOGGLE_BATTERY_ICON:
+        windowManager->toggleBatteryIcon();
+        break;
+
+    case TOGGLE_BACKLIGHT:
+        // Note: backlight is already on in this situation
+        // We're marking that it should *remain* on once menu closes
+        assert(backlight);
+        if (backlight->isLatched())
+            backlight->off();
+        else
+            backlight->latch();
+        break;
+
+    default:
+        LOG_WARN("Action not implemented");
+    }
+
+    // Move to next page, as defined for the MenuItem
+    showPage(item.nextPage);
+}
+
+// Display a new page of MenuItems
+// May reload same page, or exit menu applet entirely
+// Fills the MenuApplet::items vector
+void InkHUD::MenuApplet::showPage(MenuPage page)
+{
+    items.clear();
+
+    switch (page) {
+    case ROOT:
+        // Optional: next applet
+        if (settings.optionalMenuItems.nextTile && settings.userTiles.count > 1)
+            items.push_back(MenuItem("Next Tile", MenuAction::NEXT_TILE, MenuPage::ROOT)); // Only if multiple applets shown
+
+        // items.push_back(MenuItem("Send", MenuPage::SEND)); // TODO
+        items.push_back(MenuItem("Options", MenuPage::OPTIONS));
+        // items.push_back(MenuItem("Display Off", MenuPage::EXIT)); // TODO
+        items.push_back(MenuItem("Save & Shutdown", MenuAction::SHUTDOWN));
+        items.push_back(MenuItem("Exit", MenuPage::EXIT));
+        break;
+
+    case SEND:
+        items.push_back(MenuItem("Send Message", MenuPage::EXIT));
+        items.push_back(MenuItem("Send NodeInfo", MenuAction::SEND_NODEINFO));
+        items.push_back(MenuItem("Send Position", MenuAction::SEND_POSITION));
+        items.push_back(MenuItem("Exit", MenuPage::EXIT));
+        break;
+
+    case OPTIONS:
+        // Optional: backlight
+        if (settings.optionalMenuItems.backlight) {
+            assert(backlight);
+            items.push_back(MenuItem(backlight->isLatched() ? "Backlight Off" : "Keep Backlight On", // Label
+                                     MenuAction::TOGGLE_BACKLIGHT,                                   // Action
+                                     MenuPage::EXIT                                                  // Exit once complete
+                                     ));
+        }
+
+        items.push_back(MenuItem("Applets", MenuPage::APPLETS));
+        items.push_back(MenuItem("Auto-show", MenuPage::AUTOSHOW));
+        items.push_back(MenuItem("Recents Duration", MenuPage::RECENTS));
+        if (settings.userTiles.maxCount > 1)
+            items.push_back(MenuItem("Layout", MenuAction::LAYOUT, MenuPage::OPTIONS));
+        items.push_back(MenuItem("Rotate", MenuAction::ROTATE, MenuPage::OPTIONS));
+        items.push_back(MenuItem("Notifications", MenuAction::TOGGLE_NOTIFICATIONS, MenuPage::OPTIONS,
+                                 &settings.optionalFeatures.notifications));
+        items.push_back(
+            MenuItem("Battery Icon", MenuAction::TOGGLE_BATTERY_ICON, MenuPage::OPTIONS, &settings.optionalFeatures.batteryIcon));
+
+        // TODO - GPS and Wifi switches
+        /*
+        // Optional: has GPS
+        if (config.position.gps_mode == meshtastic_Config_PositionConfig_GpsMode_DISABLED)
+            items.push_back(MenuItem("Enable GPS", MenuPage::EXIT)); // TODO
+        if (config.position.gps_mode == meshtastic_Config_PositionConfig_GpsMode_ENABLED)
+            items.push_back(MenuItem("Disable GPS", MenuPage::EXIT)); // TODO
+
+        // Optional: using wifi
+        if (!config.bluetooth.enabled)
+            items.push_back(MenuItem("Enable Bluetooth", MenuPage::EXIT)); // TODO: escape hatch if wifi configured wrong
+        */
+
+        items.push_back(MenuItem("Exit", MenuPage::EXIT));
+        break;
+
+    case APPLETS:
+        populateAppletPage();
+        items.push_back(MenuItem("Exit", MenuAction::ACTIVATE_APPLETS));
+        break;
+
+    case AUTOSHOW:
+        populateAutoshowPage();
+        items.push_back(MenuItem("Exit", MenuPage::EXIT));
+        break;
+
+    case RECENTS:
+        populateRecentsPage();
+        break;
+
+    case EXIT:
+        sendToBackground(); // Menu applet dismissed, allow normal behavior to resume
+        // requestUpdate(Drivers::EInk::UpdateTypes::FULL);
+        break;
+
+    default:
+        LOG_WARN("Page not implemented");
+    }
+
+    // Reset the cursor, unless reloading same page
+    // (or now out-of-bounds)
+    if (page != currentPage || cursor >= items.size()) {
+        cursor = 0;
+
+        // ROOT menu has special handling: unselected at first, to emphasise the system info panel
+        if (page == ROOT)
+            cursorShown = false;
+    }
+
+    // Remember which page we are on now
+    currentPage = page;
+}
+
+void InkHUD::MenuApplet::onRender()
+{
+    if (items.size() == 0)
+        LOG_ERROR("Empty Menu");
+
+    // Testing only
+    setFont(fontSmall);
+
+    // Dimensions for the slots where we will draw menuItems
+    const float padding = 0.05;
+    const uint16_t itemH = fontSmall.lineHeight() * 2;
+    const int16_t itemW = width() - X(padding) - X(padding);
+    const int16_t itemL = X(padding);
+    const int16_t itemR = X(1 - padding);
+    int16_t itemT = 0; // Top (y px of current slot). Incremented as we draw. Adjusted to fit system info panel on ROOT menu.
+
+    // How many full menuItems will fit on screen
+    uint8_t slotCount = (height() - itemT) / itemH;
+
+    // System info panel at the top of the menu
+    // =========================================
+
+    uint16_t &siH = systemInfoPanelHeight;                   // System info - height. Calculated at onForeground
+    const uint8_t slotsObscured = ceilf(siH / (float)itemH); // How many slots are obscured by system info panel
+
+    // System info - top
+    // Remain at 0px, until cursor reaches bottom of screen, then begin to scroll off screen.
+    // This is the same behavior we expect from the non-root menus.
+    // Implementing this with the systemp panel is slightly annoying though,
+    // and required adding the MenuApplet::getSystemInfoPanelHeight method
+    int16_t siT;
+    if (cursor < slotCount - slotsObscured - 1) // (Minus 1: comparing zero based index with a count)
+        siT = 0;
+    else
+        siT = 0 - ((cursor - (slotCount - slotsObscured - 1)) * itemH);
+
+    // If showing ROOT menu,
+    // and the panel isn't yet scrolled off screen top
+    if (currentPage == ROOT) {
+        drawSystemInfoPanel(0, siT, width()); // Draw the panel.
+        itemT = max(siT + siH, 0);            // Offset the first menu entry, so menu starts below the system info panel
+    }
+
+    // Draw menu items
+    // ===================
+
+    // Which item will be drawn to the top-most slot?
+    // Initially, this is the item 0, but may increase once we begin scrolling
+    uint8_t firstItem;
+    if (cursor < slotCount)
+        firstItem = 0;
+    else
+        firstItem = cursor - (slotCount - 1);
+
+    // Which item will be drawn to the bottom-most slot?
+    // This may be beyond the slot-count, to draw a partially off-screen item below the bottom-most slow
+    // This may be less than the slot-count, if we are reaching the end of the menuItems
+    uint8_t lastItem = min((uint8_t)firstItem + slotCount, (uint8_t)items.size() - 1);
+
+    // -- Loop: draw each (visible) menu item --
+    for (uint8_t i = firstItem; i <= lastItem; i++) {
+        // Grab the menuItem
+        MenuItem item = items.at(i);
+
+        // Center-line for the text
+        int16_t center = itemT + (itemH / 2);
+
+        if (cursorShown && i == cursor)
+            drawRect(itemL, itemT, itemW, itemH, BLACK);
+        printAt(itemL + X(padding), center, item.label, LEFT, MIDDLE);
+
+        // Testing only: circle instead of check box
+        if (item.checkState) {
+            const uint16_t cbWH = fontSmall.lineHeight();  // Checbox: width / height
+            const int16_t cbL = itemR - X(padding) - cbWH; // Checkbox: left
+            const int16_t cbT = center - (cbWH / 2);       // Checkbox : top
+            // Checkbox ticked
+            if (*(item.checkState)) {
+                drawRect(cbL, cbT, cbWH, cbWH, BLACK);
+                // First point of tick: pen down
+                const int16_t t1Y = center;
+                const int16_t t1X = cbL + 3;
+                // Second point of tick: base
+                const int16_t t2Y = center + (cbWH / 2) - 2;
+                const int16_t t2X = cbL + (cbWH / 2);
+                // Third point of tick: end of tail
+                const int16_t t3Y = center - (cbWH / 2) - 2;
+                const int16_t t3X = cbL + cbWH + 2;
+                // Draw twice: faux bold
+                drawLine(t1X, t1Y, t2X, t2Y, BLACK);
+                drawLine(t2X, t2Y, t3X, t3Y, BLACK);
+                drawLine(t1X + 1, t1Y, t2X + 1, t2Y, BLACK);
+                drawLine(t2X + 1, t2Y, t3X + 1, t3Y, BLACK);
+            }
+            // Checkbox ticked
+            else
+                drawRect(cbL, cbT, cbWH, cbWH, BLACK);
+        }
+
+        // Increment the y value (top) as we go
+        itemT += itemH;
+    }
+}
+
+void InkHUD::MenuApplet::onButtonShortPress()
+{
+    // Push the auto-close timer back
+    OSThread::setIntervalFromNow(MENU_TIMEOUT_SEC * 1000UL);
+
+    // Move menu cursor to next entry, then update
+    if (cursorShown)
+        cursor = (cursor + 1) % items.size();
+    else
+        cursorShown = true;
+    requestUpdate(Drivers::EInk::UpdateTypes::FAST);
+}
+
+void InkHUD::MenuApplet::onButtonLongPress()
+{
+    // Push the auto-close timer back
+    OSThread::setIntervalFromNow(MENU_TIMEOUT_SEC * 1000UL);
+
+    if (cursorShown)
+        execute(items.at(cursor));
+    else
+        showPage(MenuPage::EXIT); // Special case: Peek at root-menu; longpress again to close
+
+    // If we didn't already request a specialized update, when handling a menu action,
+    // then perform the usual fast update.
+    // FAST keeps things responsive: important because we're dealing with user input
+    if (!wantsToRender())
+        requestUpdate(Drivers::EInk::UpdateTypes::FAST);
+}
+
+// Dynamically create MenuItem entries for activating / deactivating Applets, for the "Applet Selection" submenu
+void InkHUD::MenuApplet::populateAppletPage()
+{
+    assert(items.size() == 0);
+
+    for (uint8_t i = 0; i < windowManager->getAppletCount(); i++) {
+        const char *name = windowManager->getAppletName(i);
+        bool *isActive = &(settings.userApplets.active[i]);
+        items.push_back(MenuItem(name, MenuAction::TOGGLE_APPLET, MenuPage::APPLETS, isActive));
+    }
+}
+
+// Dynamically create MenuItem entries for selecting which applets will automatically come to foreground when they have new data
+// We only populate this menu page with applets which are actually active
+// We use the MenuItem::checkState pointer to toggle the setting in MenuApplet::execute. Bit of a hack, but convenient.
+void InkHUD::MenuApplet::populateAutoshowPage()
+{
+    assert(items.size() == 0);
+
+    for (uint8_t i = 0; i < windowManager->getAppletCount(); i++) {
+        // Only add a menu item if applet is active
+        if (settings.userApplets.active[i]) {
+            const char *name = windowManager->getAppletName(i);
+            bool *isActive = &(settings.userApplets.autoshow[i]);
+            items.push_back(MenuItem(name, MenuAction::TOGGLE_AUTOSHOW_APPLET, MenuPage::AUTOSHOW, isActive));
+        }
+    }
+}
+
+void InkHUD::MenuApplet::populateRecentsPage()
+{
+    // How many values are shown for use to choose from
+    constexpr uint8_t optionCount = sizeof(RECENTS_OPTIONS_MINUTES) / sizeof(RECENTS_OPTIONS_MINUTES[0]);
+
+    // Create an entry for each item in RECENTS_OPTIONS_MINUTES array
+    // (Defined at top of this file)
+    for (uint8_t i = 0; i < optionCount; i++) {
+        std::string label = to_string(RECENTS_OPTIONS_MINUTES[i]) + " mins";
+        items.push_back(MenuItem(label.c_str(), MenuAction::SET_RECENTS, MenuPage::EXIT));
+    }
+}
+
+// Renders the panel shown at the top of the root menu.
+// Displays the clock, and several other pieces of instantaneous system info,
+// which we'd prefer not to have displayed in a normal applet, as they update too frequently.
+void InkHUD::MenuApplet::drawSystemInfoPanel(int16_t left, int16_t top, uint16_t width, uint16_t *renderedHeight)
+{
+    // Reset the height
+    // We'll add to this as we add elements
+    uint16_t height = 0;
+
+    // Clock (potentially)
+    // ====================
+    std::string clockString = getTimeString();
+    if (clockString.length() > 0) {
+        setFont(fontLarge);
+        printAt(width / 2, top, clockString, CENTER, TOP);
+
+        height += fontLarge.lineHeight();
+        height += fontLarge.lineHeight() * 0.1; // Padding below clock
+    }
+
+    // Stats
+    // ===================
+
+    setFont(fontSmall);
+
+    // Position of the label row for the system info
+    const int16_t labelT = top + height;
+    height += fontSmall.lineHeight() * 1.1; // Slightly increased spacing
+
+    // Position of the data row for the system info
+    const int16_t valT = top + height;
+    height += fontSmall.lineHeight() * 1.1; // Slightly increased spacing (between bottom line and divider)
+
+    // Position of divider between the info panel and the menu entries
+    const int16_t divY = top + height;
+    height += fontSmall.lineHeight() * 0.2; // Padding *below* the divider. (Above first menu item)
+
+    // Create a variable number of columns
+    // Either 3 or 4, depending on whether we have GPS
+    // Todo
+    constexpr uint8_t N_COL = 3;
+    int16_t colL[N_COL];
+    int16_t colC[N_COL];
+    int16_t colR[N_COL];
+    for (uint8_t i = 0; i < N_COL; i++) {
+        colL[i] = left + ((width / N_COL) * i);
+        colC[i] = colL[i] + ((width / N_COL) / 2);
+        colR[i] = colL[i] + (width / N_COL);
+    }
+
+    // Info blocks, left to right
+
+    // Voltage
+    float voltage = powerStatus->getBatteryVoltageMv() / 1000.0;
+    char voltageStr[6]; // "XX.XV"
+    sprintf(voltageStr, "%.1fV", voltage);
+    printAt(colC[0], labelT, "Bat", CENTER, TOP);
+    printAt(colC[0], valT, voltageStr, CENTER, TOP);
+
+    // Divider
+    for (int16_t y = valT; y <= divY; y += 3)
+        drawPixel(colR[0], y, BLACK);
+
+    // Channel Util
+    char chUtilStr[4]; // "XX%"
+    sprintf(chUtilStr, "%2.f%%", airTime->channelUtilizationPercent());
+    printAt(colC[1], labelT, "Ch", CENTER, TOP);
+    printAt(colC[1], valT, chUtilStr, CENTER, TOP);
+
+    // Divider
+    for (int16_t y = valT; y <= divY; y += 3)
+        drawPixel(colR[1], y, BLACK);
+
+    // Duty Cycle (AirTimeTx)
+    char dutyUtilStr[4]; // "XX%"
+    sprintf(dutyUtilStr, "%2.f%%", airTime->utilizationTXPercent());
+    printAt(colC[2], labelT, "Duty", CENTER, TOP);
+    printAt(colC[2], valT, dutyUtilStr, CENTER, TOP);
+
+    /*
+    // Divider
+    for (int16_t y = valT; y <= divY; y += 3)
+        drawPixel(colR[2], y, BLACK);
+
+    // GPS satellites - todo
+    printAt(colC[3], labelT, "Sats", CENTER, TOP);
+    printAt(colC[3], valT, "ToDo", CENTER, TOP);
+    */
+
+    // Horizontal divider, at bottom of system info panel
+    for (int16_t x = 0; x < width; x += 2) // Divider, centered in the padding between first system panel and first item
+        drawPixel(x, divY, BLACK);
+
+    if (renderedHeight != nullptr)
+        *renderedHeight = height;
+}
+
+// Get the height of the the panel drawn at the top of the menu
+// This is inefficient, as we do actually have to render the panel to determine the height
+// It solves a catch-22 situtation, where slotCount needs to know panel height, and panel height needs to know slotCount
+uint16_t InkHUD::MenuApplet::getSystemInfoPanelHeight()
+{
+    // Render *waay* off screen
+    uint16_t height = 0;
+    drawSystemInfoPanel(INT16_MIN, INT16_MIN, 1, &height);
+
+    return height;
+}
+
+#endif

src/graphics/niche/InkHUD/Applets/System/Menu/MenuApplet.h

@@ -0,0 +1,60 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+#include "configuration.h"
+
+#include "graphics/niche/Drivers/Backlight/LatchingBacklight.h"
+#include "graphics/niche/InkHUD/Applet.h"
+#include "graphics/niche/InkHUD/WindowManager.h"
+
+#include "./MenuItem.h"
+#include "./MenuPage.h"
+
+#include "concurrency/OSThread.h"
+
+namespace NicheGraphics::InkHUD
+{
+
+class Applet;
+
+class MenuApplet : public Applet, public concurrency::OSThread
+{
+  public:
+    MenuApplet();
+    void onActivate() override;
+    void onForeground() override;
+    void onBackground() override;
+    void onButtonShortPress() override;
+    void onButtonLongPress() override;
+    void onRender() override;
+
+    void show(Tile *t); // Open the menu, onto a user tile
+
+  protected:
+    int32_t runOnce() override;
+
+    void execute(MenuItem item);  // Perform the MenuAction associated with a MenuItem, if any
+    void showPage(MenuPage page); // Load and display a MenuPage
+    void populateAppletPage();    // Dynamically create MenuItems for toggling loaded applets
+    void populateAutoshowPage();  // Dynamically create MenuItems for selecting which applets can autoshow
+    void populateRecentsPage();   // Create menu items: a choice of values for settings.recentlyActiveSeconds
+    uint16_t getSystemInfoPanelHeight();
+    void drawSystemInfoPanel(int16_t left, int16_t top, uint16_t width,
+                             uint16_t *height = nullptr); // Info panel at top of root menu
+
+    MenuPage currentPage;
+    uint8_t cursor = 0;       // Which menu item is currently highlighted
+    bool cursorShown = false; // Is *any* item highlighted? (Root menu: no initial selection)
+
+    uint16_t systemInfoPanelHeight = 0; // Need to know before we render
+
+    std::vector<MenuItem> items; // MenuItems for the current page. Filled by ShowPage
+
+    Applet *borrowedTileOwner = nullptr; // Which applet we have temporarily replaced while displaying menu
+
+    WindowManager *windowManager = nullptr;          // Convenient access to the InkHUD::WindowManager singleton
+    Drivers::LatchingBacklight *backlight = nullptr; // Convenient access to the backlight singleton
+};
+
+} // namespace NicheGraphics::InkHUD
+
+#endif

src/graphics/niche/InkHUD/Applets/System/Menu/MenuItem.h

@@ -0,0 +1,47 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+/*
+
+One item of a MenuPage, in InkHUD::MenuApplet
+
+Added to MenuPages in InkHUD::showPage
+
+- May open a submenu or exit
+- May perform an action
+- May toggle a bool value, shown by a checkbox
+
+*/
+
+#pragma once
+
+#include "configuration.h"
+
+#include "./MenuAction.h"
+#include "./MenuPage.h"
+
+namespace NicheGraphics::InkHUD
+{
+
+// One item of a MenuPage
+class MenuItem
+{
+  public:
+    std::string label;
+    MenuAction action = NO_ACTION;
+    MenuPage nextPage = EXIT;
+    bool *checkState = nullptr;
+
+    // Various constructors, depending on the intended function of the item
+
+    MenuItem(const char *label, MenuPage nextPage) : label(label), nextPage(nextPage) {}
+    MenuItem(const char *label, MenuAction action) : label(label), action(action) {}
+    MenuItem(const char *label, MenuAction action, MenuPage nextPage) : label(label), action(action), nextPage(nextPage) {}
+    MenuItem(const char *label, MenuAction action, MenuPage nextPage, bool *checkState)
+        : label(label), action(action), nextPage(nextPage), checkState(checkState)
+    {
+    }
+};
+
+} // namespace NicheGraphics::InkHUD
+
+#endif

src/graphics/niche/InkHUD/Applets/System/Menu/MenuPage.h

@@ -0,0 +1,30 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+/*
+
+Sub-menu for InkHUD::MenuApplet
+Structure of the menu is defined in InkHUD::showPage
+
+*/
+
+#pragma once
+
+#include "configuration.h"
+
+namespace NicheGraphics::InkHUD
+{
+
+// Sub-menu for MenuApplet
+enum MenuPage : uint8_t {
+    ROOT, // Initial menu page
+    SEND,
+    OPTIONS,
+    APPLETS,
+    AUTOSHOW,
+    RECENTS, // Select length of "recentlyActiveSeconds"
+    EXIT,    // Dismiss the menu applet
+};
+
+} // namespace NicheGraphics::InkHUD
+
+#endif

src/graphics/niche/InkHUD/Applets/System/Notification/Notification.h

@@ -0,0 +1,40 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+/*
+
+A notification which might be displayed by the NotificationApplet
+
+An instance of this class is offered to Applets via Applet::approveNotification, in case they want to veto the notification.
+An Applet should veto a notification if it is already displaying the same info which the notification would convey.
+
+*/
+
+#pragma once
+
+#include "configuration.h"
+
+namespace NicheGraphics::InkHUD
+{
+
+class Notification
+{
+  public:
+    enum Type : uint8_t { NOTIFICATION_MESSAGE_BROADCAST, NOTIFICATION_MESSAGE_DIRECT, NOTIFICATION_BATTERY } type;
+
+    uint32_t timestamp;
+
+    uint8_t getChannel() { return channel; }
+    uint32_t getSender() { return sender; }
+    uint8_t getBatteryPercentage() { return batteryPercentage; }
+
+    friend class NotificationApplet;
+
+  protected:
+    uint8_t channel;
+    uint32_t sender;
+    uint8_t batteryPercentage;
+};
+
+} // namespace NicheGraphics::InkHUD
+
+#endif

src/graphics/niche/InkHUD/Applets/System/Notification/NotificationApplet.cpp

@@ -0,0 +1,219 @@
+#ifdef MESHTASTIC_INCLUDE_INKHUD
+
+#include "./NotificationApplet.h"
+
+#include "./Notification.h"
+
+#include "RTC.h"
+
+using namespace NicheGraphics;
+
+void InkHUD::NotificationApplet::onActivate()
+{
+    textMessageObserver.observe(textMessageModule);
+}
+
+// Note: This applet probably won't ever be deactivated
+void InkHUD::NotificationApplet::onDeactivate()
+{
+    textMessageObserver.unobserve(textMessageModule);
+}
+
+// Collect meta-info about the text message, and ask for approval for the notification
+// No need to save the message itself; we can use the cached InkHUD::latestMessage data during render()
+int InkHUD::NotificationApplet::onReceiveTextMessage(const meshtastic_MeshPacket *p)
+{
+    // System applets are always active
+    assert(isActive());
+
+    // Abort if feature disabled
+    // This is a bit clumsy, but avoids complicated handling when the feature is enabled / disabled
+    if (!settings.optionalFeatures.notifications)
+        return 0;
+
+    // Abort if this is an outgoing message
+    if (getFrom(p) == nodeDB->getNodeNum())
+        return 0;
+
+    // Abort if message was only an "emoji reaction"
+    // Possibly some implemetation of this in future?
+    if (p->decoded.emoji)
+        return 0;
+
+    Notification n;
+    n.timestamp = getValidTime(RTCQuality::RTCQualityDevice, true); // Current RTC time
+
+    // Gather info: in-channel message
+    if (isBroadcast(p->to)) {
+        n.type = Notification::Type::NOTIFICATION_MESSAGE_BROADCAST;
+        n.channel = p->channel;
+    }
+
+    // Gather info: DM
+    else {
+        n.type = Notification::Type::NOTIFICATION_MESSAGE_DIRECT;
+        n.sender = p->from;
+    }
+
+    // Check if we should display the notification
+    // A foreground applet might already be displaying this info
+    hasNotification = true;
+    currentNotification = n;
+    if (isApproved()) {
+        bringToForeground();
+        WindowManager::getInstance()->forceUpdate();
+    } else
+        hasNotification = false; // Clear the pending notification: it was rejected
+
+    // Return zero: no issues here, carry on notifying other observers!
+    return 0;
+}
+
+void InkHUD::NotificationApplet::onRender()
+{
+    // Clear the region beneath the tile
+    // Most applets are drawing onto an empty frame buffer and don't need to do this
+    // We do need to do this with the battery though, as it is an "overlay"
+    fillRect(0, 0, width(), height(), WHITE);
+
+    setFont(fontSmall);
+
+    // Padding (horizontal)
+    const uint16_t padW = 4;
+
+    // Main border
+    drawRect(0, 0, width(), height(), BLACK);
+    // drawRect(1, 1, width() - 2, height() - 2, BLACK);
+
+    // Timestamp (potentially)
+    // ====================
+    std::string ts = getTimeString(currentNotification.timestamp);
+    uint16_t tsW = 0;
+    int16_t divX = 0;
+
+    // Timestamp available
+    if (ts.length() > 0) {
+        tsW = getTextWidth(ts);
+        divX = padW + tsW + padW;
+
+        hatchRegion(0, 0, divX, height(), 2, BLACK);  // Fill with a dark background
+        drawLine(divX, 0, divX, height() - 1, BLACK); // Draw divider between timestamp and main text
+
+        setCrop(1, 1, divX - 1, height() - 2);
+
+        // Drop shadow
+        setTextColor(WHITE);
+        printThick(padW + (tsW / 2), height() / 2, ts, 4, 4);
+
+        // Bold text
+        setTextColor(BLACK);
+        printThick(padW + (tsW / 2), height() / 2, ts, 2, 1);
+    }
+
+    // Main text
+    // =====================
+
+    // Background fill
+    // - medium dark (1/3)
+    hatchRegion(divX, 0, width() - divX - 1, height(), 3, BLACK);
+
+    uint16_t availableWidth = width() - divX - padW;
+    std::string text = getNotificationText(availableWidth);
+
+    int16_t textM = divX + padW + (getTextWidth(text) / 2);
+
+    // Restrict area for printing
+    // - don't overlap border, or diveder
+    setCrop(divX + 1, 1, (width() - (divX + 1) - 1), height() - 2);
+
+    // Drop shadow
+    // - thick white text
+    setTextColor(WHITE);
+    printThick(textM, height() / 2, text, 4, 4);
+
+    // Main text
+    // - faux bold: double width
+    setTextColor(BLACK);
+    printThick(textM, height() / 2, text, 2, 1);
+}
+
+// Ask the WindowManager to check whether any displayed applets are already displaying the info from this notification
+// Called internally when we first get a "notifiable event", and then again before render,
+// in case autoshow swapped which applet was displayed
+bool InkHUD::NotificationApplet::isApproved()
+{
+    // Instead of an assert
+    if (!hasNotification) {
+        LOG_WARN("No notif to approve");
+        return false;
+    }
+
+    return WindowManager::getInstance()->approveNotification(currentNotification);
+}
+
+// Mark that the notification should no-longer be rendered
+// In addition to calling thing method, code needs to request a re-render of all applets
+void InkHUD::NotificationApplet::dismiss()
+{
+    sendToBackground();
+    hasNotification = false;
+    // Not requesting update directly from this method,
+    // as it is used to dismiss notifications which have been made redundant by autoshow settings, before they are ever drawn
+}
+
+// Get a string for the main body text of a notification
+// Formatted to suit screen width
+// Takes info from InkHUD::currentNotification
+std::string InkHUD::NotificationApplet::getNotificationText(uint16_t widthAvailable)
+{
+    assert(hasNotification);
+
+    std::string text;
+
+    // Text message
+    // ==============
+
+    if (IS_ONE_OF(currentNotification.type, Notification::Type::NOTIFICATION_MESSAGE_DIRECT,
+                  Notification::Type::NOTIFICATION_MESSAGE_BROADCAST)) {
+
+        // Although we are handling DM and broadcast notifications together, we do need to treat them slightly differently
+        bool isBroadcast = currentNotification.type == Notification::Type::NOTIFICATION_MESSAGE_BROADCAST;
+
+        // Pick source of message
+        MessageStore::Message *message = isBroadcast ? &latestMessage.broadcast : &latestMessage.dm;
+
+        // Find info about the sender
+        meshtastic_NodeInfoLite *node = nodeDB->getMeshNode(message->sender);
+
+        // Leading tag (channel vs. DM)
+        text += isBroadcast ? "From:" : "DM: ";
+
+        // Sender id
+        if (node && node->has_user)
+            text += node->user.short_name;
+        else
+            text += hexifyNodeNum(message->sender);
+
+        // Check if text fits
+        // - use a longer string, if we have the space
+        if (getTextWidth(text) < widthAvailable * 0.5) {
+            text.clear();
+
+            // Leading tag (channel vs. DM)
+            text += isBroadcast ? "Msg from " : "DM from ";
+
+            // Sender id
+            if (node && node->has_user)
+                text += node->user.short_name;
+            else
+                text += hexifyNodeNum(message->sender);
+
+            text += ": ";
+            text += message->text;
+        }
+    }
+
+    return text;
+}
+
+#endif