MeshCoreTel-firmware/variants/lilygo_techo/TechoBoard.cpp

#include <Arduino.h>
#include <Wire.h>

#include "TechoBoard.h"

#ifdef LILYGO_TECHO

void TechoBoard::begin() {
  NRF52Board::begin();

  Wire.begin();

  pinMode(SX126X_POWER_EN, OUTPUT);
  digitalWrite(SX126X_POWER_EN, HIGH);
  delay(10);   // give sx1262 some time to power up
}

uint16_t TechoBoard::getBattMilliVolts() {
  int adcvalue = 0;

  analogReference(AR_INTERNAL_3_0);
  analogReadResolution(12);
  delay(10);

  // ADC range is 0..3000mV and resolution is 12-bit (0..4095)
  adcvalue = analogRead(PIN_VBAT_READ);
  // Convert the raw value to compensated mv, taking the resistor-
  // divider into account (providing the actual LIPO voltage)
  return (uint16_t)((float)adcvalue * REAL_VBAT_MV_PER_LSB);
}
#endif