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

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

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

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

  if (!rtc.begin()) {
    Serial.println("RTC module NOT found");
    while (true);
  }

  if (!rtc.isrunning()) {
    Serial.println("RTC is not running, setting time...");
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }
}

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

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Date: ");
  lcd.print(now.year());
  lcd.print("/");
  if (now.month() < 10) lcd.print("0");
  lcd.print(now.month());
  lcd.print("/");
  if (now.day() < 10) lcd.print("0");
  lcd.print(now.day());

  lcd.setCursor(0, 1);
  lcd.print("Time: ");
  if (now.hour() < 10) lcd.print("0");
  lcd.print(now.hour());
  lcd.print(":");
  if (now.minute() < 10) lcd.print("0");
  lcd.print(now.minute());
  lcd.print(":");
  if (now.second() < 10) lcd.print("0");
  lcd.print(now.second());

  delay(1000);
}