Initial commit: Simple Sensor firmware for Heltec T114 with BME280

- MeshCore-based Simple Sensor firmware
- Heltec T114 without display
- BME280 sensor support (temp/humidity/pressure)
- Radio: 868.856018 MHz, SF7, BW62.5 kHz, CR4/7
- 2-byte path hash
- PlatformIO project

variants/generic-e22/platformio.ini

@@ -0,0 +1,164 @@
+[Generic_E22]
+extends = esp32_base
+board = esp32doit-devkit-v1
+build_flags =
+  ${esp32_base.build_flags}
+  -I variants/generic-e22
+  -D GENERIC_E22
+  -D P_LORA_TX_LED=2
+  -D PIN_VBAT_READ=35
+  -D P_LORA_DIO_1=33
+  -D P_LORA_NSS=18
+  -D P_LORA_RESET=RADIOLIB_NC
+  -D P_LORA_BUSY=32
+  -D P_LORA_SCLK=5
+  -D P_LORA_MOSI=27
+  -D P_LORA_MISO=19
+  -D SX126X_TXEN=13
+  -D SX126X_RXEN=14
+  -D PIN_BOARD_SDA=21
+  -D PIN_BOARD_SCL=22
+  -D SX126X_DIO2_AS_RF_SWITCH=true
+  -D SX126X_DIO3_TCXO_VOLTAGE=1.8
+  -D SX126X_CURRENT_LIMIT=140
+build_src_filter = ${esp32_base.build_src_filter}
+  +<../variants/generic-e22>
+lib_deps =
+  ${esp32_base.lib_deps}
+  adafruit/Adafruit SSD1306 @ ^2.5.13
+
+[env:Generic_E22_sx1262_repeater]
+extends = Generic_E22
+build_src_filter = ${Generic_E22.build_src_filter}
+  +<../examples/simple_repeater/*.cpp>
+build_flags =
+  ${Generic_E22.build_flags}
+  -D RADIO_CLASS=CustomSX1262
+  -D WRAPPER_CLASS=CustomSX1262Wrapper
+  -D LORA_TX_POWER=22
+  -D ADVERT_NAME='"E22 Repeater"'
+  -D ADVERT_LAT=0.0
+  -D ADVERT_LON=0.0
+  -D ADMIN_PASSWORD='"password"'
+  -D MAX_NEIGHBOURS=50
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
+lib_deps =
+  ${Generic_E22.lib_deps}
+  ${esp32_ota.lib_deps}
+
+; [env:Generic_E22_sx1262_repeater_bridge_rs232]
+; extends = Generic_E22
+; build_src_filter = ${Generic_E22.build_src_filter}
+;   +<helpers/bridges/RS232Bridge.cpp>
+;   +<../examples/simple_repeater/*.cpp>
+; build_flags =
+;   ${Generic_E22.build_flags}
+;   -D RADIO_CLASS=CustomSX1262
+;   -D WRAPPER_CLASS=CustomSX1262Wrapper
+;   -D LORA_TX_POWER=22
+;   -D ADVERT_NAME='"RS232 Bridge"'
+;   -D ADVERT_LAT=0.0
+;   -D ADVERT_LON=0.0
+;   -D ADMIN_PASSWORD='"password"'
+;   -D MAX_NEIGHBOURS=50
+;   -D WITH_RS232_BRIDGE=Serial2
+;   -D WITH_RS232_BRIDGE_RX=5
+;   -D WITH_RS232_BRIDGE_TX=6
+;  -D BRIDGE_DEBUG=1
+; ;  -D MESH_PACKET_LOGGING=1
+; ;  -D MESH_DEBUG=1
+; lib_deps =
+;   ${Generic_E22.lib_deps}
+;   ${esp32_ota.lib_deps}
+
+[env:Generic_E22_sx1262_repeater_bridge_espnow]
+extends = Generic_E22
+build_src_filter = ${Generic_E22.build_src_filter}
+  +<helpers/bridges/ESPNowBridge.cpp>
+  +<../examples/simple_repeater/*.cpp>
+build_flags =
+  ${Generic_E22.build_flags}
+  -D RADIO_CLASS=CustomSX1262
+  -D WRAPPER_CLASS=CustomSX1262Wrapper
+  -D LORA_TX_POWER=22
+  -D ADVERT_NAME='"ESPNow Bridge"'
+  -D ADVERT_LAT=0.0
+  -D ADVERT_LON=0.0
+  -D ADMIN_PASSWORD='"password"'
+  -D MAX_NEIGHBOURS=50
+  -D WITH_ESPNOW_BRIDGE=1
+;  -D BRIDGE_DEBUG=1
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
+lib_deps =
+  ${Generic_E22.lib_deps}
+  ${esp32_ota.lib_deps}
+
+[env:Generic_E22_sx1268_repeater]
+extends = Generic_E22
+build_src_filter = ${Generic_E22.build_src_filter}
+  +<../examples/simple_repeater/*.cpp>
+build_flags =
+  ${Generic_E22.build_flags}
+  -D RADIO_CLASS=CustomSX1268
+  -D WRAPPER_CLASS=CustomSX1268Wrapper
+  -D LORA_TX_POWER=22
+  -D ADVERT_NAME='"E22 Repeater"'
+  -D ADVERT_LAT=0.0
+  -D ADVERT_LON=0.0
+  -D ADMIN_PASSWORD='"password"'
+  -D MAX_NEIGHBOURS=50
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
+lib_deps =
+  ${Generic_E22.lib_deps}
+  ${esp32_ota.lib_deps}
+
+; [env:Generic_E22_sx1268_repeater_bridge_rs232]
+; extends = Generic_E22
+; build_src_filter = ${Generic_E22.build_src_filter}
+;   +<helpers/bridges/RS232Bridge.cpp>
+;   +<../examples/simple_repeater/*.cpp>
+; build_flags =
+;   ${Generic_E22.build_flags}
+;   -D RADIO_CLASS=CustomSX1268
+;   -D WRAPPER_CLASS=CustomSX1268Wrapper
+;   -D LORA_TX_POWER=22
+;   -D ADVERT_NAME='"RS232 Bridge"'
+;   -D ADVERT_LAT=0.0
+;   -D ADVERT_LON=0.0
+;   -D ADMIN_PASSWORD='"password"'
+;   -D MAX_NEIGHBOURS=50
+;   -D WITH_RS232_BRIDGE=Serial2
+;   -D WITH_RS232_BRIDGE_RX=5
+;   -D WITH_RS232_BRIDGE_TX=6
+;  -D BRIDGE_DEBUG=1
+; ;  -D MESH_PACKET_LOGGING=1
+; ;  -D MESH_DEBUG=1
+; lib_deps =
+;   ${Generic_E22.lib_deps}
+;   ${esp32_ota.lib_deps}
+
+[env:Generic_E22_sx1268_repeater_bridge_espnow]
+extends = Generic_E22
+build_src_filter = ${Generic_E22.build_src_filter}
+  +<helpers/bridges/ESPNowBridge.cpp>
+  +<../examples/simple_repeater/*.cpp>
+build_flags =
+  ${Generic_E22.build_flags}
+  -D RADIO_CLASS=CustomSX1268
+  -D WRAPPER_CLASS=CustomSX1268Wrapper
+  -D LORA_TX_POWER=22
+  -D ADVERT_NAME='"ESPNow Bridge"'
+  -D ADVERT_LAT=0.0
+  -D ADVERT_LON=0.0
+  -D ADMIN_PASSWORD='"password"'
+  -D MAX_NEIGHBOURS=50
+  -D WITH_ESPNOW_BRIDGE=1
+;  -D BRIDGE_DEBUG=1
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
+lib_deps =
+  ${Generic_E22.lib_deps}
+  ${esp32_ota.lib_deps}

variants/generic-e22/target.cpp

@@ -0,0 +1,49 @@
+#include <Arduino.h>
+#include "target.h"
+
+ESP32Board board;
+
+#if defined(P_LORA_SCLK)
+  static SPIClass spi;
+  RADIO_CLASS radio = new Module(P_LORA_NSS, P_LORA_DIO_1, P_LORA_RESET, P_LORA_BUSY, spi);
+#else
+  RADIO_CLASS radio = new Module(P_LORA_NSS, P_LORA_DIO_1, P_LORA_RESET, P_LORA_BUSY);
+#endif
+
+WRAPPER_CLASS radio_driver(radio, board);
+
+ESP32RTCClock fallback_clock;
+AutoDiscoverRTCClock rtc_clock(fallback_clock);
+SensorManager sensors;
+
+bool radio_init() {
+  fallback_clock.begin();
+  rtc_clock.begin(Wire);
+
+  #if defined(P_LORA_SCLK)
+    return radio.std_init(&spi);
+  #else
+    return radio.std_init();
+  #endif
+}
+
+uint32_t radio_get_rng_seed() {
+  return radio.random(0x7FFFFFFF);
+}
+
+void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
+  radio.setFrequency(freq);
+  radio.setSpreadingFactor(sf);
+  radio.setBandwidth(bw);
+  radio.setCodingRate(cr);
+}
+
+void radio_set_tx_power(int8_t dbm) {
+  radio.setOutputPower(dbm);
+}
+
+mesh::LocalIdentity radio_new_identity() {
+  RadioNoiseListener rng(radio);
+  return mesh::LocalIdentity(&rng);  // create new random identity
+}
+

variants/generic-e22/target.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#define RADIOLIB_STATIC_ONLY 1
+#include <RadioLib.h>
+#include <helpers/radiolib/RadioLibWrappers.h>
+#include <helpers/ESP32Board.h>
+#include <helpers/radiolib/CustomSX1262Wrapper.h>
+#include <helpers/radiolib/CustomSX1268Wrapper.h>
+#include <helpers/AutoDiscoverRTCClock.h>
+#include <helpers/SensorManager.h>
+
+extern ESP32Board board;
+extern WRAPPER_CLASS radio_driver;
+extern AutoDiscoverRTCClock rtc_clock;
+extern SensorManager sensors;
+
+bool radio_init();
+uint32_t radio_get_rng_seed();
+void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
+void radio_set_tx_power(int8_t dbm);
+mesh::LocalIdentity radio_new_identity();
+

variants/generic-e22/variant.h

@@ -0,0 +1,44 @@
+// For OLED LCD
+#define I2C_SDA 21
+#define I2C_SCL 22
+
+// For GPS, 'undef's not needed
+#define GPS_TX_PIN 15
+#define GPS_RX_PIN 12
+#define PIN_GPS_EN 4
+#define GPS_POWER_TOGGLE // Moved definition from platformio.ini to here
+
+#define BUTTON_PIN 39  // The middle button GPIO on the T-Beam
+#define BATTERY_PIN 35 // A battery voltage measurement pin, voltage divider connected here to measure battery voltage
+#define ADC_CHANNEL ADC1_GPIO35_CHANNEL
+#define ADC_MULTIPLIER 1.85 // (R1 = 470k, R2 = 680k)
+#define EXT_PWR_DETECT 4    // Pin to detect connected external power source for LILYGO® TTGO T-Energy T18 and other DIY boards
+#define EXT_NOTIFY_OUT 12   // Overridden default pin to use for Ext Notify Module (#975).
+#define LED_PIN 2           // add status LED (compatible with core-pcb and DIY targets)
+
+// Radio
+#define USE_SX1262 // E22-900M30S uses SX1262
+#define USE_SX1268 // E22-400M30S uses SX1268
+#define SX126X_MAX_POWER 22 // Outputting 22dBm from SX1262 results in ~30dBm E22-900M30S output (module only uses last stage of the YP2233W PA)
+#define SX126X_DIO3_TCXO_VOLTAGE 1.8 // E22 series TCXO reference voltage is 1.8V
+
+#define SX126X_CS 18    // EBYTE module's NSS pin
+#define SX126X_SCK 5    // EBYTE module's SCK pin
+#define SX126X_MOSI 27  // EBYTE module's MOSI pin
+#define SX126X_MISO 19  // EBYTE module's MISO pin
+#define SX126X_RESET 23 // EBYTE module's NRST pin
+#define SX126X_BUSY 32  // EBYTE module's BUSY pin
+#define SX126X_DIO1 33  // EBYTE module's DIO1 pin
+
+// The E22's TXEN pin is connected to MCU pin, E22's RXEN pin is connected to MCU pin (allows for ramping up PA before transmission
+// Don't define DIO2_AS_RF_SWITCH because we only use DIO2 or an MCU pin mutually exclusively to connect to E22's TXEN (to prevent
+// a short if they are both connected at the same time and there's a slight non-neglibible delay and/or voltage difference between
+// DIO2 and TXEN).
+#define SX126X_TXEN 13 // Schematic connects EBYTE module's TXEN pin to MCU
+#define SX126X_RXEN 14 // Schematic connects EBYTE module's RXEN pin to MCU
+
+#define LORA_CS SX126X_CS     // Compatibility with variant file configuration structure
+#define LORA_SCK SX126X_SCK   // Compatibility with variant file configuration structure
+#define LORA_MOSI SX126X_MOSI // Compatibility with variant file configuration structure
+#define LORA_MISO SX126X_MISO // Compatibility with variant file configuration structure
+#define LORA_DIO1 SX126X_DIO1 // Compatibility with variant file configuration structure