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

#define SERIAL_OPTION 0

LiquidCrystal_I2C lcd(0x27,16,2);
RTC_DS1307 RTC;

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

  lcd.init();
  lcd.backlight();

  RTC.begin();
}

void loop() {
  
  DateTime now=RTC.now();
  
  lcd.setCursor(0, 0);
  lcd.print("Jam: ");
  lcd.print(now.hour()); lcd.print(":"); lcd.print(now.minute()); lcd.print(":"); lcd.print(now.second());

  delay(1000);
}