/*
  Forum: https://forum.arduino.cc/t/fuhrende-null-bei-sekunde/1165965
  Wokwi: https://wokwi.com/projects/305979285237137984

*/
#include "RTClib.h"

RTC_DS1307 rtc;

void setup () {
  Serial.begin(115200);

  if (! rtc.begin()) {
    Serial.println("RTC nicht gefunden");
    Serial.flush();
    while (true) {
      // DoNothing
    };
  }
}

char buffer[80];

void loop () {
  DateTime now = rtc.now();
  sprintf(buffer, "%02d.%02d.%04d %02d:%02d:%02d", now.day(), now.month(), now.year(), now.hour(),now.minute(), now.second());
  Serial.println(buffer);
  delay(1000);
}

//  sprintf(buffer, "%02d.%02d.%04d %02d:%02d:%02d  %03d", now.day(), now.month(), now.year(), now.hour(),now.minute(), now.second(),yearday);