#include <Wire.h>
#include "RTClib.h"
#include <LiquidCrystal_I2C.h>     // if you don´t have I2C version of the display, use LiquidCrystal.h library instead

LiquidCrystal_I2C lcd(0x27,16,2);

RTC_DS3231 rtc;

void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  lcd.clear();
  
  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
  }

  if (rtc.lostPower()) {
    Serial.println("RTC lost power, let's set the time!");
    // Set waktu pada RTC ketika kehilangan daya
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }
}

void loop() {
  // Baca waktu dari RTC
  DateTime now = rtc.now();

  // Tampilkan waktu pada Serial Monitor
  Serial.print(now.year(), DEC);
  Serial.print('/');
  Serial.print(now.month(), DEC);
  Serial.print('/');
  Serial.print(now.day(), DEC);
  Serial.print(" ");
  Serial.print(now.hour(), DEC);
  Serial.print(':');
  Serial.print(now.minute(), DEC);
  Serial.print(':');
  Serial.print(now.second(), DEC);
  Serial.println();

  lcd.setCursor(0, 0);
  lcd.print(String(now.year(), DEC) + "/" + String(now.month(), DEC) + "/" + String(now.day(), DEC));
  lcd.setCursor(0, 1);
  lcd.print(String(now.hour(), DEC) + ":" + String(now.minute(), DEC) + ":" + String(now.second(), DEC));

  delay(1000); // Tunggu 1 detik
}