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/wio-e5-dev/platformio.ini

@@ -0,0 +1,50 @@
+[lora_e5]
+extends = stm32_base
+board = lora_e5_dev_board
+board_upload.maximum_size = 229376 ; 32kb for FS
+build_flags = ${stm32_base.build_flags}
+  -D RADIO_CLASS=CustomSTM32WLx
+  -D WRAPPER_CLASS=CustomSTM32WLxWrapper
+  -D SPI_INTERFACES_COUNT=0
+  -D RX_BOOSTED_GAIN=true
+  -D PIN_SERIAL_RX=PB7
+  -D PIN_SERIAL_TX=PB6
+  -I variants/wio-e5-dev
+build_src_filter = ${stm32_base.build_src_filter}
+  +<../variants/wio-e5-dev>
+
+[env:wio-e5_repeater]
+extends = lora_e5
+build_flags = ${lora_e5.build_flags}
+  -D LORA_TX_POWER=22
+  -D ADVERT_NAME='"WIO-E5 Repeater"'
+  -D ADMIN_PASSWORD='"password"'
+  -D MAX_NEIGHBOURS=50
+build_src_filter = ${lora_e5.build_src_filter}
+  +<../examples/simple_repeater/*.cpp>
+
+[env:wio-e5-repeater_bridge_rs232]
+extends = lora_e5
+build_flags = ${lora_e5.build_flags}
+  -D LORA_TX_POWER=22
+  -D ADVERT_NAME='"WIO-E5 Repeater"'
+  -D ADMIN_PASSWORD='"password"'
+  -D MAX_NEIGHBOURS=50
+  -D ENABLE_HWSERIAL2
+  -D WITH_RS232_BRIDGE=Serial2
+  -D WITH_RS232_BRIDGE_RX=PA3
+  -D WITH_RS232_BRIDGE_TX=PA2
+build_src_filter = ${lora_e5.build_src_filter}
+  +<helpers/bridges/RS232Bridge.cpp>
+  +<../examples/simple_repeater/*.cpp>
+
+[env:wio-e5_companion_radio_usb]
+extends = lora_e5
+build_flags = ${lora_e5.build_flags}
+  -D LORA_TX_POWER=22
+  -D MAX_CONTACTS=100
+  -D MAX_GROUP_CHANNELS=8
+build_src_filter = ${lora_e5.build_src_filter}
+  +<../examples/companion_radio/*.cpp>
+lib_deps = ${lora_e5.lib_deps}
+  densaugeo/base64 @ ~1.4.0

variants/wio-e5-dev/target.cpp

@@ -0,0 +1,73 @@
+#include <Arduino.h>
+#include "target.h"
+#include <helpers/ArduinoHelpers.h>
+
+WIOE5Board board;
+
+RADIO_CLASS radio = new STM32WLx_Module();
+
+WRAPPER_CLASS radio_driver(radio, board);
+
+static const uint32_t rfswitch_pins[] = {PA4,  PA5,  RADIOLIB_NC, RADIOLIB_NC, RADIOLIB_NC};
+static const Module::RfSwitchMode_t rfswitch_table[] = {
+  {STM32WLx::MODE_IDLE,  {LOW,  LOW}},
+  {STM32WLx::MODE_RX,    {HIGH, LOW}},
+  {STM32WLx::MODE_TX_HP, {LOW, HIGH}},  // for LoRa-E5 mini
+//  {STM32WLx::MODE_TX_LP, {HIGH, HIGH}},   // for LoRa-E5-LE mini
+  END_OF_MODE_TABLE,
+};
+
+VolatileRTCClock rtc_clock;
+SensorManager sensors;
+
+#ifndef LORA_CR
+  #define LORA_CR      5
+#endif
+
+bool radio_init() {
+//  rtc_clock.begin(Wire);
+  
+// #ifdef SX126X_DIO3_TCXO_VOLTAGE
+//   float tcxo = SX126X_DIO3_TCXO_VOLTAGE;
+// #else
+//   float tcxo = 1.6f;
+// #endif
+
+  radio.setRfSwitchTable(rfswitch_pins, rfswitch_table);
+
+  int status = radio.begin(LORA_FREQ, LORA_BW, LORA_SF, LORA_CR, RADIOLIB_SX126X_SYNC_WORD_PRIVATE, LORA_TX_POWER, 16, 1.7, 0);
+
+  if (status != RADIOLIB_ERR_NONE) {
+    Serial.print("ERROR: radio init failed: ");
+    Serial.println(status);
+    return false;  // fail
+  }
+    
+  #ifdef RX_BOOSTED_GAIN
+    radio.setRxBoostedGainMode(RX_BOOSTED_GAIN);
+  #endif
+ 
+  radio.setCRC(1);
+  
+  return true;  // success
+}
+
+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/wio-e5-dev/target.h

@@ -0,0 +1,33 @@
+#pragma once
+
+#define RADIOLIB_STATIC_ONLY 1
+#include <RadioLib.h>
+#include <helpers/radiolib/RadioLibWrappers.h>
+#include <helpers/stm32/STM32Board.h>
+#include <helpers/radiolib/CustomSTM32WLxWrapper.h>
+#include <helpers/ArduinoHelpers.h>
+#include <helpers/SensorManager.h>
+
+class WIOE5Board : public STM32Board {
+public:
+    const char* getManufacturerName() const override {
+        return "Seeed Wio E5 Dev Board";
+    }
+
+    // Just returns ADC value for now to test adc
+    uint16_t getBattMilliVolts() override {
+        uint32_t raw = analogRead(PIN_A3);
+        return raw;
+    }
+};
+
+extern WIOE5Board board;
+extern WRAPPER_CLASS radio_driver;
+extern VolatileRTCClock 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/wio-e5-dev/variant.h

@@ -0,0 +1,5 @@
+#pragma once
+
+#include <variant_generic.h>
+
+#undef RNG