diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 8031b8da7..3f0d994df 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -23,4 +23,4 @@ jobs:
         run: |
           pip install -U adafruit-nrfutil
       - name: Build
-        run: platformio run -e tbeam -e heltec -e lora-relay-v1
+        run: platformio run -e tbeam -e heltec -e lora-relay-v1 -e linux
diff --git a/.vscode/settings.json b/.vscode/settings.json
index e6f1d49e1..9b72a2a2f 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -48,7 +48,8 @@
         "optional": "cpp",
         "string_view": "cpp",
         "cassert": "cpp",
-        "iterator": "cpp"
+        "iterator": "cpp",
+        "shared_mutex": "cpp"
     },
     "cSpell.words": [
         "Blox",
diff --git a/bin/build-all.sh b/bin/build-all.sh
index 5a860bc49..63dfc01c1 100755
--- a/bin/build-all.sh
+++ b/bin/build-all.sh
@@ -4,7 +4,7 @@ set -e
 
 source bin/version.sh
 
-COUNTRIES="US EU433 EU865 CN JP"
+COUNTRIES="US EU433 EU865 CN JP ANZ KR"
 #COUNTRIES=US
 #COUNTRIES=CN
 
diff --git a/bin/version.sh b/bin/version.sh
index 02a3c9d62..a2c90861a 100644
--- a/bin/version.sh
+++ b/bin/version.sh
@@ -1,3 +1,3 @@
 
 
-export VERSION=1.0.0
\ No newline at end of file
+export VERSION=1.1.0
\ No newline at end of file
diff --git a/platformio.ini b/platformio.ini
index 0ba38adc7..3ab4a7815 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -9,7 +9,7 @@
 ; https://docs.platformio.org/page/projectconf.html
 
 [platformio]
-default_envs = tbeam # or if you'd like to change the default to something like lora-relay-v1 put that here
+default_envs = tbeam # lora-relay-v1 # nrf52840dk-geeksville # linux # or if you'd like to change the default to something like lora-relay-v1 put that here
 
 [common]
 ; common is not currently used
@@ -23,15 +23,9 @@ default_envs = tbeam # or if you'd like to change the default to something like
 
 [env]
 
-framework = arduino
-
-; customize the partition table
-; http://docs.platformio.org/en/latest/platforms/espressif32.html#partition-tables
-board_build.partitions = partition-table.csv
-
 ; note: we add src to our include search path so that lmic_project_config can override
 ; FIXME: fix lib/BluetoothOTA dependency back on src/ so we can remove -Isrc
-build_flags = -Wno-missing-field-initializers -Isrc -Isrc/mesh -Isrc/gps -Ilib/nanopb/include -Os -Wl,-Map,.pio/build/output.map 
+build_flags = -Wno-missing-field-initializers -Isrc -Isrc/mesh -Isrc/gps -Ilib/nanopb/include -Wl,-Map,.pio/build/output.map 
   -DHW_VERSION_${sysenv.COUNTRY}
   -DAPP_VERSION=${sysenv.APP_VERSION}
   -DHW_VERSION=${sysenv.HW_VERSION}
@@ -60,25 +54,38 @@ debug_tool = jlink
 
 lib_deps =
   https://github.com/meshtastic/esp8266-oled-ssd1306.git ; ESP8266_SSD1306 
-  SPI
   1260 ; OneButton library for non-blocking button debounce
   1202 ; CRC32, explicitly needed because dependency is missing in the ble ota update lib
-  Wire ; explicitly needed here because the AXP202 library forgets to add it
   https://github.com/meshtastic/arduino-fsm.git 
   https://github.com/meshtastic/SparkFun_Ublox_Arduino_Library.git
-  https://github.com/meshtastic/RadioLib.git#7989a269be590a5d4914ac04069b58f4930c45c1
+  https://github.com/meshtastic/RadioLib.git#ac7feac00f5e0bd95a3ac5d5852b4cc7344cf95c
   https://github.com/meshtastic/TinyGPSPlus.git 
   https://github.com/meshtastic/AXP202X_Library.git#8404abb6d4b486748636bc6ad72d2a47baaf5460
+  Wire ; explicitly needed here because the AXP202 library forgets to add it
+  SPI
+  
+; Common settings for conventional (non Portduino) Ardino targets
+[arduino_base]
+
+framework = arduino
+
+lib_deps =
+  ${env.lib_deps}
+
+build_flags = ${env.build_flags} -Os
+
+src_filter = ${env.src_filter} -<portduino/>
 
 ; Common settings for ESP targes, mixin with extends = esp32_base
 [esp32_base]
+extends = arduino_base
 platform = espressif32
 src_filter = 
-  ${env.src_filter} -<nrf52/>
+  ${arduino_base.src_filter} -<nrf52/>
 upload_speed = 921600
 debug_init_break = tbreak setup
 build_flags =
-  ${env.build_flags} -Wall -Wextra -Isrc/esp32 -mfix-esp32-psram-cache-issue -lnimble -std=c++11 
+  ${arduino_base.build_flags} -Wall -Wextra -Isrc/esp32 -Isrc/esp32-mfix-esp32-psram-cache-issue -lnimble -std=c++11 
   -DLOG_LOCAL_LEVEL=ESP_LOG_DEBUG -DCORE_DEBUG_LEVEL=ARDUHAL_LOG_LEVEL_DEBUG
   -DAXP_DEBUG_PORT=Serial
 # Hmm - this doesn't work yet
@@ -87,6 +94,10 @@ lib_ignore = segger_rtt
 platform_packages =
     framework-arduinoespressif32@https://github.com/meshtastic/arduino-esp32.git#2814f110aa618429bdd9a0a2d6a93c55f29f87a6
 
+; customize the partition table
+; http://docs.platformio.org/en/latest/platforms/espressif32.html#partition-tables
+board_build.partitions = partition-table.csv
+
 ; not needed included in ttgo-t-beam board file
 ; also to use PSRAM https://docs.platformio.org/en/latest/platforms/espressif32.html#external-ram-psram
 ;  -DBOARD_HAS_PSRAM
@@ -99,7 +110,7 @@ platform_packages =
 extends = esp32_base
 board = ttgo-t-beam
 lib_deps =
-  ${env.lib_deps}
+  ${arduino_base.lib_deps}
 build_flags = 
   ${esp32_base.build_flags} -D TBEAM_V10
 
@@ -142,20 +153,21 @@ build_flags =
 platform = https://github.com/HelTecAutomation/platform-asrmicro650x.git ; we use top-of-tree because stable version has too many bugs - asrmicro650x
 board = cubecell_board_plus
 ; FIXME, bug in cubecell arduino - they are supposed to set ARDUINO
-build_flags = ${env.build_flags} -DARDUINO=100 -Isrc/cubecell
+build_flags = ${arduino_base.build_flags} -DARDUINO=100 -Isrc/cubecell
 src_filter = 
-  ${env.src_filter} -<esp32/> -<nrf52/>
+  ${arduino_base.src_filter} -<esp32/> -<nrf52/>
   
 ; Common settings for NRF52 based targets
 [nrf52_base]
 ; Instead of the standard nordicnrf52 platform, we use our fork which has our added variant files
 ; platform = nordicnrf52
 platform = https://github.com/meshtastic/platform-nordicnrf52.git#1a2639a6b0f79b5df66bea3e3089f0d5285fdc63
+extends = arduino_base
 debug_tool = jlink
 build_type = debug ; I'm debugging with ICE a lot now
 ; note: liboberon provides the AES256 implementation for NRF52 (though not using the hardware acceleration of the NRF52840 - FIXME)
 build_flags = 
-  ${env.build_flags} -Wno-unused-variable 
+  ${arduino_base.build_flags} -Wno-unused-variable 
   -Isrc/nrf52 
   -Isdk-nrfxlib/crypto/nrf_oberon/include -Lsdk-nrfxlib/crypto/nrf_oberon/lib/cortex-m4/hard-float/ -lliboberon_3.0.3 
 ;-DCFG_DEBUG=3
@@ -212,7 +224,7 @@ monitor_speed = 115200
 extends = nrf52_base
 board = ppr
 lib_deps = 
-  ${env.lib_deps}
+  ${arduino_base.lib_deps}
   UC1701
 
 ; The https://github.com/BigCorvus/SX1262-LoRa-BLE-Relay board by @BigCorvus
@@ -233,11 +245,15 @@ build_flags = ${nrf52_base.build_flags} -Ivariants/lora_relay_v1
   -DSPI_FREQUENCY=27000000
 src_filter = ${nrf52_base.src_filter} +<../variants/lora_relay_v1>
 lib_deps = 
-  ${env.lib_deps}
+  ${arduino_base.lib_deps}
   SparkFun BQ27441 LiPo Fuel Gauge Arduino Library
   TFT_eSPI
   # Adafruit ST7735 and ST7789 Library
 
-
-
-
+; The Portduino based sim environment on top of linux
+[env:linux]
+platform = https://github.com/geeksville/platform-portduino.git
+src_filter = ${env.src_filter} -<esp32/> -<nimble/> -<nrf52/>
+build_flags = ${arduino_base.build_flags} -O0
+framework = arduino
+board = linux_x86_64
diff --git a/src/PowerFSM.cpp b/src/PowerFSM.cpp
index 80580fd03..128947bcd 100644
--- a/src/PowerFSM.cpp
+++ b/src/PowerFSM.cpp
@@ -8,7 +8,6 @@
 #include "graphics/Screen.h"
 #include "sleep.h"
 #include "target_specific.h"
-#include "timing.h"
 
 static void sdsEnter()
 {
@@ -16,7 +15,7 @@ static void sdsEnter()
 
   // Don't deepsleep if we have USB power or if the user as pressed a button recently
   // !isUSBPowered <- doesn't work yet because the axp192 isn't letting the battery fully charge when we are awake - FIXME
-  if (timing::millis() - lastPressMs > radioConfig.preferences.mesh_sds_timeout_secs)
+  if (millis() - lastPressMs > radioConfig.preferences.mesh_sds_timeout_secs)
   {
     doDeepSleep(radioConfig.preferences.sds_secs);
   }
@@ -131,7 +130,7 @@ static void onEnter()
 
     static uint32_t lastPingMs;
 
-    uint32_t now = timing::millis();
+    uint32_t now = millis();
 
     if (now - lastPingMs > 30 * 1000) { // if more than a minute since our last press, ask other nodes to update their state
         if (displayedNodeNum)
diff --git a/src/concurrency/BaseNotifiedWorkerThread.h b/src/concurrency/BaseNotifiedWorkerThread.h
new file mode 100644
index 000000000..03b82c4b0
--- /dev/null
+++ b/src/concurrency/BaseNotifiedWorkerThread.h
@@ -0,0 +1,44 @@
+#pragma once
+
+#include "WorkerThread.h"
+
+namespace concurrency {
+
+/**
+ * @brief A worker thread that waits on a freertos notification
+ */
+class BaseNotifiedWorkerThread : public WorkerThread
+{
+  public:
+    /**
+     * Notify this thread so it can run
+     */
+    virtual void notify(uint32_t v = 0, eNotifyAction action = eNoAction) = 0;
+
+    /**
+     * Notify from an ISR
+     *
+     * This must be inline or IRAM_ATTR on ESP32
+     */
+    virtual void notifyFromISR(BaseType_t *highPriWoken, uint32_t v = 0, eNotifyAction action = eNoAction) { notify(v, action); }
+    
+  protected:
+    /**
+     * The notification that was most recently used to wake the thread.  Read from loop()
+     */
+    uint32_t notification = 0;
+
+    /**
+     * What notification bits should be cleared just after we read and return them in notification?
+     *
+     * Defaults to clear all of them.
+     */
+    uint32_t clearOnRead = UINT32_MAX;
+
+    /**
+     * A method that should block execution - either waiting ona queue/mutex or a "task notification"
+     */
+    virtual void block() = 0;
+};
+
+} // namespace concurrency
diff --git a/src/concurrency/BaseThread.cpp b/src/concurrency/BaseThread.cpp
new file mode 100644
index 000000000..ab39a8c9f
--- /dev/null
+++ b/src/concurrency/BaseThread.cpp
@@ -0,0 +1,12 @@
+#include "Thread.h"
+#include <assert.h>
+
+namespace concurrency
+{
+
+void BaseThread::callRun(void *_this)
+{
+    ((BaseThread *)_this)->doRun();
+}
+
+} // namespace concurrency
diff --git a/src/concurrency/BaseThread.h b/src/concurrency/BaseThread.h
new file mode 100644
index 000000000..b1947cf45
--- /dev/null
+++ b/src/concurrency/BaseThread.h
@@ -0,0 +1,47 @@
+#pragma once
+
+#include <cstdlib>
+#include <stdint.h>
+
+#include "freertosinc.h"
+
+namespace concurrency
+{
+
+/**
+ * @brief Base threading
+ */
+class BaseThread
+{
+  protected:
+    /**
+     * set this to true to ask thread to cleanly exit asap
+     */
+    volatile bool wantExit = false;
+
+  public:
+    virtual void start(const char *name, size_t stackSize = 1024, uint32_t priority = tskIDLE_PRIORITY) = 0;
+
+    virtual ~BaseThread() {}
+
+    // uint32_t getStackHighwaterMark() { return uxTaskGetStackHighWaterMark(taskHandle); }
+
+  protected:
+    /**
+     * The method that will be called when start is called.
+     */
+    virtual void doRun() = 0;
+
+    /**
+     * All thread run methods must periodically call serviceWatchdog, or the system will declare them hung and panic.
+     *
+     * this only applies after startWatchdog() has been called.  If you need to sleep for a long time call stopWatchdog()
+     */
+    virtual void serviceWatchdog() {}
+    virtual void startWatchdog() {}
+    virtual void stopWatchdog() {}
+
+    static void callRun(void *_this);
+};
+
+} // namespace concurrency
diff --git a/src/concurrency/NotifiedWorkerThread.cpp b/src/concurrency/FreeRtosNotifiedWorkerThread.cpp
similarity index 70%
rename from src/concurrency/NotifiedWorkerThread.cpp
rename to src/concurrency/FreeRtosNotifiedWorkerThread.cpp
index 7785ecf8c..8fec432dc 100644
--- a/src/concurrency/NotifiedWorkerThread.cpp
+++ b/src/concurrency/FreeRtosNotifiedWorkerThread.cpp
@@ -1,19 +1,23 @@
 #include "NotifiedWorkerThread.h"
 
+#ifdef HAS_FREE_RTOS
+
 namespace concurrency {
 
 /**
  * Notify this thread so it can run
  */
-void NotifiedWorkerThread::notify(uint32_t v, eNotifyAction action)
+void FreeRtosNotifiedWorkerThread::notify(uint32_t v, eNotifyAction action)
 {
     xTaskNotify(taskHandle, v, action);
 }
 
-void NotifiedWorkerThread::block()
+void FreeRtosNotifiedWorkerThread::block()
 {
     xTaskNotifyWait(0,                                          // don't clear notification on entry
                     clearOnRead, &notification, portMAX_DELAY); // Wait forever
 }
 
 } // namespace concurrency
+
+#endif
\ No newline at end of file
diff --git a/src/concurrency/FreeRtosNotifiedWorkerThread.h b/src/concurrency/FreeRtosNotifiedWorkerThread.h
new file mode 100644
index 000000000..c18009e43
--- /dev/null
+++ b/src/concurrency/FreeRtosNotifiedWorkerThread.h
@@ -0,0 +1,40 @@
+#pragma once
+
+#include "BaseNotifiedWorkerThread.h"
+
+#ifdef HAS_FREE_RTOS
+
+namespace concurrency {
+
+/**
+ * @brief A worker thread that waits on a freertos notification
+ */
+class FreeRtosNotifiedWorkerThread : public BaseNotifiedWorkerThread
+{
+  public:
+    /**
+     * Notify this thread so it can run
+     */
+    void notify(uint32_t v = 0, eNotifyAction action = eNoAction);
+
+    /**
+     * Notify from an ISR
+     *
+     * This must be inline or IRAM_ATTR on ESP32
+     */
+    inline void notifyFromISR(BaseType_t *highPriWoken, uint32_t v = 0, eNotifyAction action = eNoAction)
+    {
+        xTaskNotifyFromISR(taskHandle, v, action, highPriWoken);
+    }
+
+  protected:
+
+    /**
+     * A method that should block execution - either waiting ona queue/mutex or a "task notification"
+     */
+    virtual void block();
+};
+
+} // namespace concurrency
+
+#endif
\ No newline at end of file
diff --git a/src/concurrency/Thread.cpp b/src/concurrency/FreeRtosThread.cpp
similarity index 65%
rename from src/concurrency/Thread.cpp
rename to src/concurrency/FreeRtosThread.cpp
index 1e1c7bb63..1fe7108e3 100644
--- a/src/concurrency/Thread.cpp
+++ b/src/concurrency/FreeRtosThread.cpp
@@ -1,5 +1,7 @@
-#include "Thread.h"
-#include "timing.h"
+#include "FreeRtosThread.h"
+
+#ifdef HAS_FREE_RTOS
+
 #include <assert.h>
 
 #ifdef ARDUINO_ARCH_ESP32
@@ -9,25 +11,20 @@
 namespace concurrency
 {
 
-void Thread::start(const char *name, size_t stackSize, uint32_t priority)
+void FreeRtosThread::start(const char *name, size_t stackSize, uint32_t priority)
 {
     auto r = xTaskCreate(callRun, name, stackSize, this, priority, &taskHandle);
     assert(r == pdPASS);
 }
 
-void Thread::callRun(void *_this)
-{
-    ((Thread *)_this)->doRun();
-}
-
-void Thread::serviceWatchdog()
+void FreeRtosThread::serviceWatchdog()
 {
 #ifdef ARDUINO_ARCH_ESP32
     esp_task_wdt_reset();
 #endif
 }
 
-void Thread::startWatchdog()
+void FreeRtosThread::startWatchdog()
 {
 #ifdef ARDUINO_ARCH_ESP32
     auto r = esp_task_wdt_add(taskHandle);
@@ -35,7 +32,7 @@ void Thread::startWatchdog()
 #endif
 }
 
-void Thread::stopWatchdog()
+void FreeRtosThread::stopWatchdog()
 {
 #ifdef ARDUINO_ARCH_ESP32
     auto r = esp_task_wdt_delete(taskHandle);
@@ -44,3 +41,5 @@ void Thread::stopWatchdog()
 }
 
 } // namespace concurrency
+
+#endif
\ No newline at end of file
diff --git a/src/concurrency/FreeRtosThread.h b/src/concurrency/FreeRtosThread.h
new file mode 100644
index 000000000..6f52119db
--- /dev/null
+++ b/src/concurrency/FreeRtosThread.h
@@ -0,0 +1,44 @@
+#pragma once
+
+#include "BaseThread.h"
+#include "freertosinc.h"
+
+#ifdef HAS_FREE_RTOS
+
+namespace concurrency
+{
+
+/**
+ * @brief Base threading
+ */
+class FreeRtosThread : public BaseThread
+{
+  protected:
+    TaskHandle_t taskHandle = NULL;
+
+  public:
+    void start(const char *name, size_t stackSize = 1024, uint32_t priority = tskIDLE_PRIORITY);
+
+    virtual ~FreeRtosThread() { vTaskDelete(taskHandle); }
+
+    // uint32_t getStackHighwaterMark() { return uxTaskGetStackHighWaterMark(taskHandle); }
+
+  protected:
+    /**
+     * The method that will be called when start is called.
+     */
+    virtual void doRun() = 0;
+
+    /**
+     * All thread run methods must periodically call serviceWatchdog, or the system will declare them hung and panic.
+     *
+     * this only applies after startWatchdog() has been called.  If you need to sleep for a long time call stopWatchdog()
+     */
+    void serviceWatchdog();
+    void startWatchdog();
+    void stopWatchdog();
+};
+
+} // namespace concurrency
+
+#endif
\ No newline at end of file
diff --git a/src/concurrency/Lock.cpp b/src/concurrency/Lock.cpp
index 07f5a2ef5..ffe997f8d 100644
--- a/src/concurrency/Lock.cpp
+++ b/src/concurrency/Lock.cpp
@@ -1,8 +1,10 @@
 #include "Lock.h"
 #include <cassert>
 
-namespace concurrency {
+namespace concurrency
+{
 
+#ifdef HAS_FREE_RTOS
 Lock::Lock()
 {
     handle = xSemaphoreCreateBinary();
@@ -19,5 +21,12 @@ void Lock::unlock()
 {
     assert(xSemaphoreGive(handle));
 }
+#else
+Lock::Lock() {}
+
+void Lock::lock() {}
+
+void Lock::unlock() {}
+#endif
 
 } // namespace concurrency
diff --git a/src/concurrency/Lock.h b/src/concurrency/Lock.h
index 09877cc25..1b9ea20d5 100644
--- a/src/concurrency/Lock.h
+++ b/src/concurrency/Lock.h
@@ -2,7 +2,8 @@
 
 #include "../freertosinc.h"
 
-namespace concurrency {
+namespace concurrency
+{
 
 /**
  * @brief Simple wrapper around FreeRTOS API for implementing a mutex lock
@@ -26,8 +27,9 @@ class Lock
     void unlock();
 
   private:
+#ifdef HAS_FREE_RTOS
     SemaphoreHandle_t handle;
-
+#endif
 };
 
 } // namespace concurrency
diff --git a/src/concurrency/NotifiedWorkerThread.h b/src/concurrency/NotifiedWorkerThread.h
index 5ab5a58e7..dee92eb8a 100644
--- a/src/concurrency/NotifiedWorkerThread.h
+++ b/src/concurrency/NotifiedWorkerThread.h
@@ -1,47 +1,17 @@
 #pragma once
 
-#include "WorkerThread.h"
+#include "FreeRtosNotifiedWorkerThread.h"
+#include "PosixNotifiedWorkerThread.h"
 
-namespace concurrency {
-
-/**
- * @brief A worker thread that waits on a freertos notification
- */
-class NotifiedWorkerThread : public WorkerThread
+namespace concurrency
 {
-  public:
-    /**
-     * Notify this thread so it can run
-     */
-    void notify(uint32_t v = 0, eNotifyAction action = eNoAction);
 
-    /**
-     * Notify from an ISR
-     *
-     * This must be inline or IRAM_ATTR on ESP32
-     */
-    inline void notifyFromISR(BaseType_t *highPriWoken, uint32_t v = 0, eNotifyAction action = eNoAction)
-    {
-        xTaskNotifyFromISR(taskHandle, v, action, highPriWoken);
-    }
+#ifdef HAS_FREE_RTOS
+typedef FreeRtosNotifiedWorkerThread NotifiedWorkerThread;
+#endif
 
-  protected:
-    /**
-     * The notification that was most recently used to wake the thread.  Read from loop()
-     */
-    uint32_t notification = 0;
-
-    /**
-     * What notification bits should be cleared just after we read and return them in notification?
-     *
-     * Defaults to clear all of them.
-     */
-    uint32_t clearOnRead = UINT32_MAX;
-
-    /**
-     * A method that should block execution - either waiting ona queue/mutex or a "task notification"
-     */
-    virtual void block();
-};
+#ifdef __unix__
+typedef PosixNotifiedWorkerThread NotifiedWorkerThread;
+#endif
 
 } // namespace concurrency
diff --git a/src/concurrency/PeriodicScheduler.cpp b/src/concurrency/PeriodicScheduler.cpp
index d2fa77f9c..5902ddd7a 100644
--- a/src/concurrency/PeriodicScheduler.cpp
+++ b/src/concurrency/PeriodicScheduler.cpp
@@ -1,7 +1,6 @@
 #include "PeriodicScheduler.h"
 #include "PeriodicTask.h"
 #include "LockGuard.h"
-#include "../timing.h"
 
 namespace concurrency {
 
@@ -10,7 +9,7 @@ void PeriodicScheduler::loop()
 {
     LockGuard lg(&lock);
 
-    uint32_t now = timing::millis();
+    uint32_t now = millis();
     for (auto t : tasks) {
         if (t->period && (now - t->lastMsec) >= t->period) {
 
diff --git a/src/concurrency/PeriodicTask.h b/src/concurrency/PeriodicTask.h
index 910c0dfde..74d4c8a34 100644
--- a/src/concurrency/PeriodicTask.h
+++ b/src/concurrency/PeriodicTask.h
@@ -1,7 +1,7 @@
 #pragma once
 
+#include <Arduino.h>
 #include "PeriodicScheduler.h"
-#include "timing.h"
 
 namespace concurrency {
 
@@ -38,7 +38,7 @@ class PeriodicTask
      */
     void setPeriod(uint32_t p)
     {
-        lastMsec = timing::millis(); // reset starting from now
+        lastMsec = millis(); // reset starting from now
         period = p;
     }
 
diff --git a/src/concurrency/PosixNotifiedWorkerThread.cpp b/src/concurrency/PosixNotifiedWorkerThread.cpp
new file mode 100644
index 000000000..e759a871e
--- /dev/null
+++ b/src/concurrency/PosixNotifiedWorkerThread.cpp
@@ -0,0 +1,19 @@
+#include "PosixNotifiedWorkerThread.h"
+
+#ifdef __unix__
+
+#include <Utility.h>
+
+using namespace concurrency;
+
+/**
+ * Notify this thread so it can run
+ */
+void PosixNotifiedWorkerThread::notify(uint32_t v, eNotifyAction action) NOT_IMPLEMENTED("notify");
+
+/**
+ * A method that should block execution - either waiting ona queue/mutex or a "task notification"
+ */
+void PosixNotifiedWorkerThread::block() NOT_IMPLEMENTED("block");
+
+#endif
\ No newline at end of file
diff --git a/src/concurrency/PosixNotifiedWorkerThread.h b/src/concurrency/PosixNotifiedWorkerThread.h
new file mode 100644
index 000000000..d75b74dd8
--- /dev/null
+++ b/src/concurrency/PosixNotifiedWorkerThread.h
@@ -0,0 +1,26 @@
+#pragma once
+
+#include "BaseNotifiedWorkerThread.h"
+
+namespace concurrency {
+
+/**
+ * @brief A worker thread that waits on a freertos notification
+ */
+class PosixNotifiedWorkerThread : public BaseNotifiedWorkerThread
+{
+  public:
+    /**
+     * Notify this thread so it can run
+     */
+    void notify(uint32_t v = 0, eNotifyAction action = eNoAction);
+
+  protected:
+
+    /**
+     * A method that should block execution - either waiting ona queue/mutex or a "task notification"
+     */
+    virtual void block();
+};
+
+} // namespace concurrency
diff --git a/src/concurrency/PosixThread.h b/src/concurrency/PosixThread.h
new file mode 100644
index 000000000..3f46ebc08
--- /dev/null
+++ b/src/concurrency/PosixThread.h
@@ -0,0 +1,33 @@
+#pragma once
+
+#include "BaseThread.h"
+
+#ifdef __unix__
+
+namespace concurrency
+{
+
+/**
+ * @brief Base threading
+ */
+class PosixThread : public BaseThread
+{
+  protected:
+  public:
+    void start(const char *name, size_t stackSize = 1024, uint32_t priority = tskIDLE_PRIORITY) {}
+
+    virtual ~PosixThread() {}
+
+    // uint32_t getStackHighwaterMark() { return uxTaskGetStackHighWaterMark(taskHandle); }
+
+  protected:
+    /**
+     * The method that will be called when start is called.
+     */
+    virtual void doRun() = 0;
+
+};
+
+} // namespace concurrency
+
+#endif
\ No newline at end of file
diff --git a/src/concurrency/Thread.h b/src/concurrency/Thread.h
index ce72111e9..f9fa60fde 100644
--- a/src/concurrency/Thread.h
+++ b/src/concurrency/Thread.h
@@ -1,47 +1,17 @@
 #pragma once
 
-#include "freertosinc.h"
+#include "FreeRtosThread.h"
+#include "PosixThread.h"
 
-namespace concurrency {
-
-/**
- * @brief Base threading
- */
-class Thread
+namespace concurrency
 {
-  protected:
-    TaskHandle_t taskHandle = NULL;
 
-    /**
-     * set this to true to ask thread to cleanly exit asap
-     */
-    volatile bool wantExit = false;
-
-  public:
-    void start(const char *name, size_t stackSize = 1024, uint32_t priority = tskIDLE_PRIORITY);
-
-    virtual ~Thread() { vTaskDelete(taskHandle); }
-
-    uint32_t getStackHighwaterMark() { return uxTaskGetStackHighWaterMark(taskHandle); }
-
-  protected:
-    /**
-     * The method that will be called when start is called.
-     */
-    virtual void doRun() = 0;
-
-    /**
-     * All thread run methods must periodically call serviceWatchdog, or the system will declare them hung and panic.
-     *
-     * this only applies after startWatchdog() has been called.  If you need to sleep for a long time call stopWatchdog()
-     */
-    void serviceWatchdog();
-    void startWatchdog();
-    void stopWatchdog();
-
-  private:
-    static void callRun(void *_this);
-};
+#ifdef HAS_FREE_RTOS
+typedef FreeRtosThread Thread;
+#endif
 
+#ifdef __unix__
+typedef PosixThread Thread;
+#endif
 
 } // namespace concurrency
diff --git a/src/concurrency/WorkerThread.cpp b/src/concurrency/WorkerThread.cpp
index 8ea1e6a85..b2ec18d81 100644
--- a/src/concurrency/WorkerThread.cpp
+++ b/src/concurrency/WorkerThread.cpp
@@ -1,5 +1,4 @@
 #include "WorkerThread.h"
-#include "timing.h"
 
 namespace concurrency {
 
@@ -17,8 +16,8 @@ void WorkerThread::doRun()
 
 #ifdef DEBUG_STACK
         static uint32_t lastPrint = 0;
-        if (timing::millis() - lastPrint > 10 * 1000L) {
-            lastPrint = timing::millis();
+        if (millis() - lastPrint > 10 * 1000L) {
+            lastPrint = millis();
             meshtastic::printThreadInfo("net");
         }
 #endif
diff --git a/src/configuration.h b/src/configuration.h
index b9c869102..9087ca8cf 100644
--- a/src/configuration.h
+++ b/src/configuration.h
@@ -55,24 +55,21 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 /// Convert a preprocessor name into a quoted string and if that string is empty use "unset"
 #define optstr(s) (xstr(s)[0] ? xstr(s) : "unset")
 
-#ifdef NRF52_SERIES // All of the NRF52 targets are configured using variant.h, so this section shouldn't need to be
-                    // board specific
+#ifdef PORTDUINO
+
+#define NO_ESP32 // Don't use ESP32 libs (mainly bluetooth)
+
+#elif defined(NRF52_SERIES) // All of the NRF52 targets are configured using variant.h, so this section shouldn't need to be
+// board specific
 
 //
 // Standard definitions for NRF52 targets
 //
 
-// Nop definition for these attributes - not used on NRF52
-#define EXT_RAM_ATTR
-#define IRAM_ATTR
-
 #define NO_ESP32 // Don't use ESP32 libs (mainly bluetooth)
 
 // We bind to the GPS using variant.h instead for this platform (Serial1)
 
-// FIXME, not yet ready for NRF52
-#define RTC_DATA_ATTR
-
 #define LED_PIN PIN_LED1 // LED1 on nrf52840-DK
 
 // If the variant filed defines as standard button
@@ -89,9 +86,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define NO_ESP32 // Don't use ESP32 libs (mainly bluetooth)
 
-// FIXME, not yet ready for NRF52
-#define RTC_DATA_ATTR
-
 #define LED_PIN -1 // FIXME totally bogus
 #define BUTTON_PIN -1
 
@@ -125,6 +119,17 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #endif
 
+//
+// Standard definitions for !ESP32 targets
+//
+
+#ifdef NO_ESP32
+// Nop definition for these attributes - not used on NRF52
+#define EXT_RAM_ATTR
+#define IRAM_ATTR
+#define RTC_DATA_ATTR
+#endif
+
 // -----------------------------------------------------------------------------
 // OLED
 // -----------------------------------------------------------------------------
@@ -197,8 +202,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define BUTTON_PIN 39
 #define BATTERY_PIN 35 // A battery voltage measurement pin, voltage divider connected here to measure battery voltage
 
-#define USE_RF95
-
 #define USE_RF95
 #define LORA_DIO0 26 // a No connect on the SX1262 module
 #define LORA_RESET 23
@@ -340,6 +343,24 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define HW_VENDOR "nrf52unknown" // FIXME - unknown nrf52 board
 
+#elif PORTDUINO
+
+#define HW_VENDOR "portduino"
+
+#define USE_SIM_RADIO
+
+#define USE_RF95
+#define LORA_DIO0 26 // a No connect on the SX1262 module
+#define LORA_RESET 23
+#define LORA_DIO1 33 // Not really used
+#define LORA_DIO2 32 // Not really used
+
+// Fake SPI device selections
+#define RF95_SCK 5
+#define RF95_MISO 19
+#define RF95_MOSI 27
+#define RF95_NSS 18
+
 #endif
 
 #ifdef USE_RF95
diff --git a/src/esp32/BluetoothSoftwareUpdate.cpp b/src/esp32/BluetoothSoftwareUpdate.cpp
index 9bc7445a8..4fa518ccb 100644
--- a/src/esp32/BluetoothSoftwareUpdate.cpp
+++ b/src/esp32/BluetoothSoftwareUpdate.cpp
@@ -1,7 +1,6 @@
 #include <Arduino.h>
 
 #include "../concurrency/LockGuard.h"
-#include "../timing.h"
 #include "BluetoothSoftwareUpdate.h"
 #include "PowerFSM.h"
 #include "RadioLibInterface.h"
@@ -102,7 +101,7 @@ int update_crc32_callback(uint16_t conn_handle, uint16_t attr_handle, struct ble
     } else {
         if (Update.end()) {
             DEBUG_MSG("OTA done, rebooting in 5 seconds!\n");
-            rebootAtMsec = timing::millis() + 5000;
+            rebootAtMsec = millis() + 5000;
         } else {
             DEBUG_MSG("Error Occurred. Error #: %d\n", Update.getError());
         }
@@ -128,7 +127,7 @@ int update_result_callback(uint16_t conn_handle, uint16_t attr_handle, struct bl
 
 void bluetoothRebootCheck()
 {
-    if (rebootAtMsec && timing::millis() > rebootAtMsec) {
+    if (rebootAtMsec && millis() > rebootAtMsec) {
         DEBUG_MSG("Rebooting for update\n");
         ESP.restart();
     }
diff --git a/src/freertosinc.h b/src/freertosinc.h
index 818eae6b3..c5dfddc8e 100644
--- a/src/freertosinc.h
+++ b/src/freertosinc.h
@@ -3,22 +3,32 @@
 // The FreeRTOS includes are in a different directory on ESP32 and I can't figure out how to make that work with platformio gcc
 // options so this is my quick hack to make things work
 
-#ifdef ARDUINO_ARCH_ESP32
+#if defined(ARDUINO_ARCH_ESP32)
 #define HAS_FREE_RTOS
+
 #include <freertos/FreeRTOS.h>
 #include <freertos/queue.h>
 #include <freertos/semphr.h>
 #include <freertos/task.h>
-#else
-// not yet supported on cubecell
-#ifndef CubeCell_BoardPlus
+#endif
+
+#if defined(ARDUINO_NRF52_ADAFRUIT)
 #define HAS_FREE_RTOS
+
 #include <FreeRTOS.h>
 #include <queue.h>
 #include <semphr.h>
 #include <task.h>
+#endif
+
+#ifdef HAS_FREE_RTOS
+
+// Include real FreeRTOS defs above
+
 #else
 
+// Include placeholder fake FreeRTOS defs
+
 #include <Arduino.h>
 
 typedef uint32_t TickType_t;
@@ -26,5 +36,12 @@ typedef uint32_t BaseType_t;
 
 #define portMAX_DELAY UINT32_MAX
 
+#define tskIDLE_PRIORITY 0
+#define configMAX_PRIORITIES 10 // Highest priority level
+
+// Don't do anything on non free rtos platforms when done with the ISR
+#define portYIELD_FROM_ISR(x)
+
+enum eNotifyAction { eNoAction, eSetValueWithoutOverwrite, eSetValueWithOverwrite };
+
 #endif
-#endif
\ No newline at end of file
diff --git a/src/gps/GPS.cpp b/src/gps/GPS.cpp
index 3902b655e..b3ab28d29 100644
--- a/src/gps/GPS.cpp
+++ b/src/gps/GPS.cpp
@@ -1,7 +1,6 @@
 
 #include "GPS.h"
 #include "configuration.h"
-#include "timing.h"
 #include <assert.h>
 #include <time.h>
 
@@ -36,7 +35,7 @@ void readFromRTC()
     struct timeval tv; /* btw settimeofday() is helpfull here too*/
 
     if (!gettimeofday(&tv, NULL)) {
-        uint32_t now = timing::millis();
+        uint32_t now = millis();
 
         DEBUG_MSG("Read RTC time as %ld (cur millis %u) valid=%d\n", tv.tv_sec, now, timeSetFromGPS);
         timeStartMsec = now;
@@ -79,7 +78,7 @@ void perhapsSetRTC(struct tm &t)
 
 uint32_t getTime()
 {
-    return ((timing::millis() - timeStartMsec) / 1000) + zeroOffsetSecs;
+    return ((millis() - timeStartMsec) / 1000) + zeroOffsetSecs;
 }
 
 uint32_t getValidTime()
diff --git a/src/gps/NMEAGPS.cpp b/src/gps/NMEAGPS.cpp
index 6b797fd7d..2100fdcb2 100644
--- a/src/gps/NMEAGPS.cpp
+++ b/src/gps/NMEAGPS.cpp
@@ -1,6 +1,5 @@
 #include "NMEAGPS.h"
 #include "configuration.h"
-#include "timing.h"
 
 static int32_t toDegInt(RawDegrees d)
 {
@@ -19,7 +18,7 @@ void NMEAGPS::loop()
         reader.encode(c);
     }
 
-    uint32_t now = timing::millis();
+    uint32_t now = millis();
     if ((now - lastUpdateMsec) > 20 * 1000) { // Ugly hack for now - limit update checks to once every 20 secs (but still consume
                                               // serial chars at whatever rate)
         lastUpdateMsec = now;
diff --git a/src/graphics/Screen.cpp b/src/graphics/Screen.cpp
index a108cd022..0b57bfb3e 100644
--- a/src/graphics/Screen.cpp
+++ b/src/graphics/Screen.cpp
@@ -31,6 +31,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "graphics/images.h"
 #include "main.h"
 #include "mesh-pb-constants.h"
+#include "target_specific.h"
 #include "meshwifi/meshwifi.h"
 #include "utils.h"
 
diff --git a/src/main.cpp b/src/main.cpp
index bb4b12e10..4c4bff0f6 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -40,7 +40,7 @@
 #include "meshwifi/meshhttp.h"
 #include "meshwifi/meshwifi.h"
 #include "sleep.h"
-#include "timing.h"
+#include "target_specific.h"
 #include <OneButton.h>
 #include <Wire.h>
 // #include <driver/rtc_io.h>
@@ -225,7 +225,7 @@ void setup()
 
     // Init our SPI controller (must be before screen and lora)
     initSPI();
-#ifdef NRF52_SERIES
+#ifdef NO_ESP32
     SPI.begin();
 #else
     // ESP32
@@ -270,7 +270,10 @@ void setup()
     gps = new NMEAGPS();
     gps->setup();
 #endif
-    gpsStatus->observe(&gps->newStatus);
+    if (gps)
+        gpsStatus->observe(&gps->newStatus);
+    else
+        DEBUG_MSG("Warning: No GPS found - running without GPS\n");
     nodeStatus->observe(&nodeDB.newStatus);
 
     service.init();
@@ -367,7 +370,8 @@ void loop()
 {
     uint32_t msecstosleep = 1000 * 30; // How long can we sleep before we again need to service the main loop?
 
-    gps->loop(); // FIXME, remove from main, instead block on read
+    if (gps)
+        gps->loop(); // FIXME, remove from main, instead block on read
     router.loop();
     powerFSM.run_machine();
     service.loop();
@@ -399,15 +403,15 @@ void loop()
 
     // Show boot screen for first 3 seconds, then switch to normal operation.
     static bool showingBootScreen = true;
-    if (showingBootScreen && (timing::millis() > 3000)) {
+    if (showingBootScreen && (millis() > 3000)) {
         screen.stopBootScreen();
         showingBootScreen = false;
     }
 
 #ifdef DEBUG_STACK
     static uint32_t lastPrint = 0;
-    if (timing::millis() - lastPrint > 10 * 1000L) {
-        lastPrint = timing::millis();
+    if (millis() - lastPrint > 10 * 1000L) {
+        lastPrint = millis();
         meshtastic::printThreadInfo("main");
     }
 #endif
diff --git a/src/main.h b/src/main.h
index 39b1364f6..366ef8610 100644
--- a/src/main.h
+++ b/src/main.h
@@ -23,6 +23,6 @@ extern graphics::Screen screen;
 // Return a human readable string of the form "Meshtastic_ab13"
 const char *getDeviceName();
 
-void getMacAddr(uint8_t *dmac);
+
 
 void nrf52Setup(), esp32Setup(), nrf52Loop(), esp32Loop();
diff --git a/src/mesh/MeshRadio.h b/src/mesh/MeshRadio.h
index 5b3a27b9c..070c7c9a7 100644
--- a/src/mesh/MeshRadio.h
+++ b/src/mesh/MeshRadio.h
@@ -36,6 +36,17 @@
 #define CH_SPACING_TW 0.2
 #define NUM_CHANNELS_TW 10
 
+// AU/NZ channel settings 915-928MHz
+#define CH0_ANZ 916.0f      // MHz - avoid overcrowding on 915.0
+#define CH_SPACING_ANZ 0.5f
+#define NUM_CHANNELS_ANZ 20
+
+// KR channel settings (KR920-923)
+// Start from TTN download channel freq. (921.9f is for download, others are for uplink)
+#define CH0_KR 921.9f // MHz
+#define CH_SPACING_KR 0.2f
+#define NUM_CHANNELS_KR 8
+
 // FIXME add defs for other regions and use them here
 #ifdef HW_VERSION_US
 #define CH0 CH0_US
@@ -63,9 +74,19 @@
 #define CH0 CH0_TW
 #define CH_SPACING CH_SPACING_TW
 #define NUM_CHANNELS NUM_CHANNELS_TW
+#elif defined(HW_VERSION_ANZ)
+// Australia and NZ
+#define CH0 CH0_ANZ
+#define CH_SPACING CH_SPACING_ANZ
+#define NUM_CHANNELS NUM_CHANNELS_ANZ
+#elif defined(HW_VERSION_KR)
+// Republic of Korea
+#define CH0 CH0_KR
+#define CH_SPACING CH_SPACING_KR
+#define NUM_CHANNELS NUM_CHANNELS_KR
 #else
 // HW version not set - assume US
 #define CH0 CH0_US
 #define CH_SPACING CH_SPACING_US
 #define NUM_CHANNELS NUM_CHANNELS_US
-#endif
+#endif
\ No newline at end of file
diff --git a/src/mesh/MeshService.cpp b/src/mesh/MeshService.cpp
index c614c0866..3356e0922 100644
--- a/src/mesh/MeshService.cpp
+++ b/src/mesh/MeshService.cpp
@@ -13,7 +13,6 @@
 #include "main.h"
 #include "mesh-pb-constants.h"
 #include "power.h"
-#include "timing.h"
 
 /*
 receivedPacketQueue - this is a queue of messages we've received from the mesh, which we are keeping to deliver to the phone.
@@ -68,8 +67,8 @@ void MeshService::init()
     sendOwnerPeriod.setup();
     nodeDB.init();
 
-    assert(gps);
-    gpsObserver.observe(&gps->newStatus);
+    if (gps)
+        gpsObserver.observe(&gps->newStatus);
     packetReceivedObserver.observe(&router.notifyPacketReceived);
 }
 
@@ -316,7 +315,7 @@ int MeshService::onGPSChanged(const meshtastic::GPSStatus *unused)
 
     // We limit our GPS broadcasts to a max rate
     static uint32_t lastGpsSend;
-    uint32_t now = timing::millis();
+    uint32_t now = millis();
     if (lastGpsSend == 0 || now - lastGpsSend > radioConfig.preferences.position_broadcast_secs * 1000) {
         lastGpsSend = now;
         DEBUG_MSG("Sending position to mesh\n");
diff --git a/src/mesh/NodeDB.cpp b/src/mesh/NodeDB.cpp
index 07a97acfb..bf82fe10a 100644
--- a/src/mesh/NodeDB.cpp
+++ b/src/mesh/NodeDB.cpp
@@ -33,7 +33,14 @@ DeviceState versions used to be defined in the .proto file but really only this
 #define DEVICESTATE_CUR_VER 11
 #define DEVICESTATE_MIN_VER DEVICESTATE_CUR_VER
 
-#ifndef NO_ESP32
+#ifdef PORTDUINO
+// Portduino version
+#include "PortduinoFS.h"
+#define FS PortduinoFS
+#define FSBegin() true
+#define FILE_O_WRITE "w"
+#define FILE_O_READ "r"
+#elif !defined(NO_ESP32)
 // ESP32 version
 #include "SPIFFS.h"
 #define FS SPIFFS
diff --git a/src/mesh/PacketHistory.cpp b/src/mesh/PacketHistory.cpp
index b83fab3c6..3d1884ace 100644
--- a/src/mesh/PacketHistory.cpp
+++ b/src/mesh/PacketHistory.cpp
@@ -1,7 +1,6 @@
 #include "PacketHistory.h"
 #include "configuration.h"
 #include "mesh-pb-constants.h"
-#include "../timing.h"
 
 PacketHistory::PacketHistory()
 {
@@ -19,7 +18,7 @@ bool PacketHistory::wasSeenRecently(const MeshPacket *p, bool withUpdate)
         return false; // Not a floodable message ID, so we don't care
     }
 
-    uint32_t now = timing::millis();
+    uint32_t now = millis();
     for (size_t i = 0; i < recentPackets.size();) {
         PacketRecord &r = recentPackets[i];
 
diff --git a/src/mesh/PhoneAPI.cpp b/src/mesh/PhoneAPI.cpp
index 2e8800c13..caadf8563 100644
--- a/src/mesh/PhoneAPI.cpp
+++ b/src/mesh/PhoneAPI.cpp
@@ -4,7 +4,6 @@
 #include "NodeDB.h"
 #include "PowerFSM.h"
 #include "RadioInterface.h"
-#include "timing.h"
 #include <assert.h>
 
 PhoneAPI::PhoneAPI()
@@ -21,7 +20,7 @@ void PhoneAPI::init()
 void PhoneAPI::checkConnectionTimeout()
 {
     if (isConnected) {
-        bool newConnected = (timing::millis() - lastContactMsec < radioConfig.preferences.phone_timeout_secs * 1000L);
+        bool newConnected = (millis() - lastContactMsec < radioConfig.preferences.phone_timeout_secs * 1000L);
         if (!newConnected) {
             isConnected = false;
             onConnectionChanged(isConnected);
@@ -35,7 +34,7 @@ void PhoneAPI::checkConnectionTimeout()
 void PhoneAPI::handleToRadio(const uint8_t *buf, size_t bufLength)
 {
     powerFSM.trigger(EVENT_CONTACT_FROM_PHONE); // As long as the phone keeps talking to us, don't let the radio go to sleep
-    lastContactMsec = timing::millis();
+    lastContactMsec = millis();
     if (!isConnected) {
         isConnected = true;
         onConnectionChanged(isConnected);
diff --git a/src/mesh/RadioInterface.cpp b/src/mesh/RadioInterface.cpp
index ae4ef4219..1a08f282e 100644
--- a/src/mesh/RadioInterface.cpp
+++ b/src/mesh/RadioInterface.cpp
@@ -6,7 +6,6 @@
 #include "assert.h"
 #include "configuration.h"
 #include "sleep.h"
-#include "timing.h"
 #include <assert.h>
 #include <pb_decode.h>
 #include <pb_encode.h>
@@ -178,7 +177,7 @@ size_t RadioInterface::beginSending(MeshPacket *p)
     // DEBUG_MSG("sending queued packet on mesh (txGood=%d,rxGood=%d,rxBad=%d)\n", rf95.txGood(), rf95.rxGood(), rf95.rxBad());
     assert(p->which_payload == MeshPacket_encrypted_tag); // It should have already been encoded by now
 
-    lastTxStart = timing::millis();
+    lastTxStart = millis();
 
     PacketHeader *h = (PacketHeader *)radiobuf;
 
diff --git a/src/mesh/ReliableRouter.cpp b/src/mesh/ReliableRouter.cpp
index 174c184a0..acec6b7f9 100644
--- a/src/mesh/ReliableRouter.cpp
+++ b/src/mesh/ReliableRouter.cpp
@@ -2,7 +2,6 @@
 #include "MeshTypes.h"
 #include "configuration.h"
 #include "mesh-pb-constants.h"
-#include "timing.h"
 
 // ReliableRouter::ReliableRouter() {}
 
@@ -163,7 +162,7 @@ PendingPacket *ReliableRouter::startRetransmission(MeshPacket *p)
  */
 void ReliableRouter::doRetransmissions()
 {
-    uint32_t now = timing::millis();
+    uint32_t now = millis();
 
     // FIXME, we should use a better datastructure rather than walking through this map.
     // for(auto el: pending) {
diff --git a/src/mesh/ReliableRouter.h b/src/mesh/ReliableRouter.h
index 04974febb..f2e8774d8 100644
--- a/src/mesh/ReliableRouter.h
+++ b/src/mesh/ReliableRouter.h
@@ -2,7 +2,6 @@
 
 #include "FloodingRouter.h"
 #include "../concurrency/PeriodicTask.h"
-#include "../timing.h"
 #include <unordered_map>
 
 /**
@@ -49,7 +48,7 @@ struct PendingPacket {
     PendingPacket() {}
     PendingPacket(MeshPacket *p);
 
-    void setNextTx() { nextTxMsec = timing::millis() + random(20 * 1000L, 22 * 1000L); }
+    void setNextTx() { nextTxMsec = millis() + random(20 * 1000L, 22 * 1000L); }
 };
 
 class GlobalPacketIdHashFunction
diff --git a/src/mesh/TypedQueue.h b/src/mesh/TypedQueue.h
index 90ed07f10..a2b82626f 100644
--- a/src/mesh/TypedQueue.h
+++ b/src/mesh/TypedQueue.h
@@ -53,7 +53,7 @@ template <class T> class TypedQueue
   public:
     TypedQueue(int maxElements) {}
 
-    // int numFree() { return uxQueueSpacesAvailable(h); }
+    int numFree() { return 1; } // Always claim 1 free, because we can grow to any size
 
     bool isEmpty() { return q.empty(); }
 
diff --git a/src/mesh/mesh-pb-constants.cpp b/src/mesh/mesh-pb-constants.cpp
index dc0d188ab..337e585de 100644
--- a/src/mesh/mesh-pb-constants.cpp
+++ b/src/mesh/mesh-pb-constants.cpp
@@ -6,10 +6,10 @@
 #include <pb_decode.h>
 #include <pb_encode.h>
 
-#ifdef NO_ESP32
+#ifdef ARDUINO_ARCH_NRF52
 #include "Adafruit_LittleFS.h"
 using namespace Adafruit_LittleFS_Namespace; // To get File type
-#endif 
+#endif
 
 /// helper function for encoding a record as a protobuf, any failures to encode are fatal and we will panic
 /// returns the encoded packet size
@@ -49,7 +49,7 @@ bool readcb(pb_istream_t *stream, uint8_t *buf, size_t count)
         return count == 0;
     }
 
-    status = (file->read(buf, count) == (int) count);
+    status = (file->read(buf, count) == (int)count);
 
     if (file->available() == 0)
         stream->bytes_left = 0;
diff --git a/src/portduino/PortduinoGlue.cpp b/src/portduino/PortduinoGlue.cpp
new file mode 100644
index 000000000..690af6071
--- /dev/null
+++ b/src/portduino/PortduinoGlue.cpp
@@ -0,0 +1,32 @@
+#include "CryptoEngine.h"
+#include "target_specific.h"
+#include <Utility.h>
+
+// FIXME - move getMacAddr/setBluetoothEnable into a HALPlatform class
+
+uint32_t hwId; // fixme move into portduino
+
+void getMacAddr(uint8_t *dmac)
+{
+    if (!hwId) {
+        notImplemented("getMacAddr");
+        hwId = random();
+    }
+
+    dmac[0] = 0x80;
+    dmac[1] = 0;
+    dmac[2] = 0;
+    dmac[3] = hwId >> 16;
+    dmac[4] = hwId >> 8;
+    dmac[5] = hwId & 0xff;
+}
+
+void setBluetoothEnable(bool on)
+{
+    notImplemented("setBluetoothEnable");
+}
+
+// FIXME - implement real crypto for linux
+CryptoEngine *crypto = new CryptoEngine();
+
+void updateBatteryLevel(uint8_t level) NOT_IMPLEMENTED("updateBatteryLevel");
\ No newline at end of file
diff --git a/src/sleep.cpp b/src/sleep.cpp
index 886886b50..731273c9b 100644
--- a/src/sleep.cpp
+++ b/src/sleep.cpp
@@ -7,7 +7,6 @@
 #include "error.h"
 #include "main.h"
 #include "target_specific.h"
-#include "timing.h"
 
 #ifndef NO_ESP32
 #include "esp32/pm.h"
@@ -123,11 +122,11 @@ bool doPreflightSleep()
 /// Tell devices we are going to sleep and wait for them to handle things
 static void waitEnterSleep()
 {
-    uint32_t now = timing::millis();
+    uint32_t now = millis();
     while (!doPreflightSleep()) {
         delay(100); // Kinda yucky - wait until radio says say we can shutdown (finished in process sends/receives)
 
-        if (timing::millis() - now > 30 * 1000) { // If we wait too long just report an error and go to sleep
+        if (millis() - now > 30 * 1000) { // If we wait too long just report an error and go to sleep
             recordCriticalError(ErrSleepEnterWait);
             assert(0); // FIXME - for now we just restart, need to fix bug #167
             break;
diff --git a/src/target_specific.h b/src/target_specific.h
index 6acca364a..1e79df510 100644
--- a/src/target_specific.h
+++ b/src/target_specific.h
@@ -1,6 +1,10 @@
 #pragma once
 
+#include <Arduino.h>
+
 // Functions that are unique to particular target types (esp32, bare, nrf52 etc...)
 
 // Enable/disable bluetooth.
-void setBluetoothEnable(bool on);
\ No newline at end of file
+void setBluetoothEnable(bool on);
+
+void getMacAddr(uint8_t *dmac);
\ No newline at end of file
diff --git a/src/timing.cpp b/src/timing.cpp
deleted file mode 100644
index f7cffaa65..000000000
--- a/src/timing.cpp
+++ /dev/null
@@ -1,10 +0,0 @@
-#include "timing.h"
-#include "freertosinc.h"
-
-namespace timing {
-
-    uint32_t millis() {
-        return xTaskGetTickCount();
-    }
-
-} // namespace timing
diff --git a/src/timing.h b/src/timing.h
deleted file mode 100644
index 7f741d45f..000000000
--- a/src/timing.h
+++ /dev/null
@@ -1,9 +0,0 @@
-#pragma once
-
-#include <cstdint>
-
-namespace timing {
-
-    uint32_t millis();
-
-} // namespace timing
\ No newline at end of file