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

RTC_DS1307 rtc;

#define I2C_ADDR    0x27
#define LCD_COLUMNS 16
#define LCD_LINES   2
LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);
void setup() {
  // put your setup code here, to run once:
    if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    abort();
  }
  lcd.init();
  lcd.backlight();
}
void loop() {
  // put your main code here, to run repeatedly:
  DateTime now = rtc.now();

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print(now.hour(), DEC);
  lcd.print(":");
  lcd.print(now.minute(), DEC);
  lcd.print(":");
  lcd.print(now.second(), DEC);
  delay(1000);
}