#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <RTClib.h>

RTC_DS3231 rtc;

LiquidCrystal_I2C lcd(0x27, 16, 2);  // Alamat I2C LCD 16x2

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

  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
  }

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

  lcd.begin(16, 2);
  lcd.print("Jam Real-Time");
  delay(2000);
  lcd.clear();
}

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

  lcd.setCursor(0, 0);
  lcd.print("Time : ");
  lcd.print(now.hour(), DEC);
  lcd.print(':');
  printDigits(now.minute());
  lcd.print(':');
  printDigits(now.second());

  lcd.setCursor(0, 1);
  lcd.print("Date : ");
  lcd.print(now.year(), DEC);
  lcd.print('/');
  lcd.print(now.month(), DEC);
  lcd.print('/');
  lcd.print(now.day(), DEC);

  delay(1000);
}

void printDigits(int digits) {
  // Utility function for printing two digits
  if (digits < 10)
    lcd.print('0');
  lcd.print(digits);
}