MeshCore/src/helpers/nrf52/TechoBoard.h

#pragma once

#include <MeshCore.h>
#include <Arduino.h>

// LoRa radio module pins for LilyGo T-Echo
#define  P_LORA_DIO_1     20
#define  P_LORA_NSS       24
#define  P_LORA_RESET     25
#define  P_LORA_BUSY      17
#define  P_LORA_SCLK      19
#define  P_LORA_MISO      23
#define  P_LORA_MOSI      22
#define  SX126X_POWER_EN  37

#define SX126X_DIO2_AS_RF_SWITCH  true
#define SX126X_DIO3_TCXO_VOLTAGE   1.8

// built-ins
#define  PIN_VBAT_READ    4
#define  ADC_MULTIPLIER   (2.0)

class TechoBoard : public mesh::MainBoard {
protected:
  uint8_t startup_reason;

public:
  void begin();
  uint8_t getStartupReason() const override { return startup_reason; }

  #define BATTERY_SAMPLES 8

  uint16_t getBattMilliVolts() override {
    analogReadResolution(12);
    uint32_t raw = 0;
    for (int i = 0; i < BATTERY_SAMPLES; i++) {
      raw += analogRead(PIN_VBAT_READ);
    }
    raw = raw / BATTERY_SAMPLES;

    return (ADC_MULTIPLIER * raw) / 4096;
  }

  const char* getManufacturerName() const override {
    return "LilyGo T-Echo";
  }

  void reboot() override {
    NVIC_SystemReset();
  }

  bool startOTAUpdate() override;
};