Pomiar napiecia baterii w Sensor Board:

analogReference(INTERNAL); //1V1 internal refernce
float getBatteryVoltage()
{
  float voltage = analogRead(A0)*1.1*(4.0303/1023); //4.0303 ([1000k+330k]/330k) voltage divider formula
  return voltage;
}

Główna funkcja
void loop()
{
  float temperature = sht31.readTemperature();
  float humidity = sht31.readHumidity();
  light.readChannels(CH0,CH1);
  light.getLux(CH0,CH1,lux);
  float voltage = getBatteryVoltage();
  send(msgTemp.set(temperature, 1));
  send(msgHum.set(humidity, 1));
  send(msgVolt.set(voltage, 2));
  send(msgLux.set(lux, 1));
  sleep(UPDATE_INTERVAL); // Sleep for a while to save energy
}