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Add support for Heltec HRU-3601

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Board is very similar to the Heltec HT-C62 based boards (Heltec HT62 variant) but due to wiring of SK6812 Neopixel LED to GPIO2 it becomes incompatible due to the regular HT-C62 dev board using a simple LED on the same GPIO. Depends on [protobufs#521](https://github.com/meshtastic/protobufs/pull/521).

Works:

* SK6812 Neopixel on GPIO2
* [GXCAS GXHTV3](https://www.lcsc.com/product-detail/Temperature-Sensors_GXCAS-GXHTV3C_C5441730.html) (SHTC3 compatible)

Won't fix:

* Battery reading - Board has no voltage divider on VBAT (board has a 1.25mm pitch "JST" style connector and a TP4054 charge IC)
* Main thread LED - Board has no LED on simple GPIO

Board schematic: [HRU3601.pdf](https://github.com/user-attachments/files/15874850/HRU3601.pdf)

Signed-off-by: Andrew Yong <me@ndoo.sg>
This commit is contained in:
Andrew Yong 2024-06-18 22:07:32 +08:00
parent 3e9e0fdd49
commit 1515c8e763
4 changed files with 76 additions and 0 deletions
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2
src/platform/esp32/architecture.h
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@ -101,6 +101,8 @@
#define HW_VENDOR meshtastic_HardwareModel_STATION_G1
#elif defined(DR_DEV)
#define HW_VENDOR meshtastic_HardwareModel_DR_DEV
#elif defined(HELTEC_HRU_3601)
#define HW_VENDOR meshtastic_HardwareModel_HELTEC_HRU_3601
#elif defined(HELTEC_V3)
#define HW_VENDOR meshtastic_HardwareModel_HELTEC_V3
#elif defined(HELTEC_WSL_V3)

25
variants/heltec_hru_3601/pins_arduino.h Normal file
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@ -0,0 +1,25 @@
#ifndef Pins_Arduino_h
#define Pins_Arduino_h
#include <stdint.h>
#include <variant.h>
static const uint8_t TX = UART_TX;
static const uint8_t RX = UART_RX;
static const uint8_t SDA = I2C_SDA;
static const uint8_t SCL = I2C_SCL;
static const uint8_t SS = 8;
static const uint8_t MOSI = 7;
static const uint8_t MISO = 6;
static const uint8_t SCK = 10;
static const uint8_t A0 = 0;
static const uint8_t A1 = 1;
static const uint8_t A2 = 2;
static const uint8_t A3 = 3;
static const uint8_t A4 = 4;
static const uint8_t A5 = 5;
#endif /* Pins_Arduino_h */

9
variants/heltec_hru_3601/platformio.ini Normal file
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@ -0,0 +1,9 @@
[env:heltec-hru-3601]
extends = esp32c3_base
board = adafruit_qtpy_esp32c3
build_flags =
${esp32_base.build_flags}
-D HELTEC_HRU_3601
-I variants/heltec_hru_3601
lib_deps = ${esp32c3_base.lib_deps}
adafruit/Adafruit NeoPixel @ ^1.12.0

40
variants/heltec_hru_3601/variant.h Normal file
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@ -0,0 +1,40 @@
#define BUTTON_PIN 9
#define HAS_SCREEN 0
#define HAS_GPS 0
#undef GPS_RX_PIN
#undef GPS_TX_PIN
#define USE_SX1262
#define LORA_SCK 10
#define LORA_MISO 6
#define LORA_MOSI 7
#define LORA_CS 8
#define LORA_DIO0 RADIOLIB_NC
#define LORA_RESET 5
#define LORA_DIO1 3
#define LORA_DIO2 RADIOLIB_NC
#define LORA_BUSY 4
#define SX126X_CS LORA_CS
#define SX126X_DIO1 LORA_DIO1
#define SX126X_BUSY LORA_BUSY
#define SX126X_RESET LORA_RESET
#define SX126X_DIO2_AS_RF_SWITCH
#define SX126X_DIO3_TCXO_VOLTAGE 1.8
// Vext_Ctrl pin controls 3.3V LDO (U2) which provides power to I2C peripheral
#define PIN_POWER_EN 1
// Board has I2C connected to UART0 pins, and no other hardware serial port
#define UART_TX -1
#define UART_RX -1
// Board has I2C connected to U0RXD and U0TXD
#define I2C_SDA 21
#define I2C_SCL 20
// Board has RGB LED on GPIO2
#define HAS_NEOPIXEL // Enable the use of neopixels
#define NEOPIXEL_COUNT 1 // How many neopixels are connected
#define NEOPIXEL_DATA 2 // gpio pin used to send data to the neopixels
#define NEOPIXEL_TYPE (NEO_GRB + NEO_KHZ800) // type of neopixels in use