boolean syncEventTriggered = false;
NTPSyncEvent_t ntpEvent;

void startNTPSync() {
  Serial.println("Starting NTP synchronization");

  NTP.onNTPSyncEvent([](NTPSyncEvent_t event) {
    ntpEvent = event;
    syncEventTriggered = true;
  });

  NTP.begin("pool.ntp.org", 1, true);
  NTP.setInterval(5, 3600);  
}

void updateNtpTime() {
  if (syncEventTriggered) {
    processSyncEvent(ntpEvent);
    syncEventTriggered = false;
  }
}

void stopNTPSync() {
  NTP.stop();
}

void processSyncEvent(NTPSyncEvent_t ntpEvent) {
  if (ntpEvent) {
    Serial.print("Time Sync error: ");
    if (ntpEvent == noResponse)
      Serial.println("NTP server not reachable");
    else if (ntpEvent == invalidAddress)
      Serial.println("Invalid NTP server address");
  } else {
    syncNtpRtc = true;
  }
}