setting RTC

#include <RTClib.h>
#include <Wire.h>

RTC_DS3231 rtc;

char t[32];

void setup()
{
  Serial.begin(9600);
  Wire.begin();

  rtc.begin();
  //untuk pertama kali setting unslash, dan seterusnya slash agar tidak tersetting ulang
 rtc.adjust(DateTime(F(__DATE__),F(__TIME__)));
 rtc.adjust(DateTime(2019, 06, 22, 22, 18, 00)); //sesuaikan jam dan tanggalnya dgn tgl skrng


}

void loop()
{
  DateTime now = rtc.now();

  sprintf(t, "%02d:%02d:%02d %02d/%02d/%02d",  now.hour(), now.minute(), now.second(), now.day(), now.month(), now.year());

  Serial.print(F("Date/Time: "));
  Serial.println(t);

  delay(1000);
}