rtcsetup.ino

rtcsetup.ino

void RtcSetup ()
{
  Serial.print("compiled: ");
  Serial.print(__DATE__);
  Serial.println(__TIME__);
  Rtc.Begin(21, 23);

  RtcDateTime compiled = RtcDateTime(__DATE__, __TIME__);
  printDateTime(compiled);
  Serial.println();

  if (!Rtc.IsDateTimeValid())
  {
    if (Rtc.LastError() != 0)
    {
      // we have a communications error
      // see https://www.arduino.cc/en/Reference/WireEndTransmission for
      // what the number means
      Serial.print("RTC communications error = ");
      Serial.println(Rtc.LastError());
    }
    else
    {
      // Common Causes:
      //    1) first time you ran and the device wasn't running yet
      //    2) the battery on the device is low or even missing
      Serial.println("RTC lost confidence in the DateTime!");
      Rtc.SetDateTime(compiled);
    }
  }

  if (!Rtc.GetIsRunning())
  {
    Serial.println("RTC was not actively running, starting now");
    Rtc.SetIsRunning(true);
  }

  RtcDateTime now = Rtc.GetDateTime();
  if (now < compiled)
  {
    Serial.println("RTC is older than compile time!  (Updating DateTime)");
    Rtc.SetDateTime(compiled);
  }

  // never assume the Rtc was last configured by you, so
  // just clear them to your needed state
  Rtc.Enable32kHzPin(false);
  Rtc.SetSquareWavePin(DS3231SquareWavePin_ModeNone);
}