#include <Wire.h>
#include "RTClib.h"
#include <LiquidCrystal_I2C.h>
RTC_DS1307 rtc;
LiquidCrystal_I2C lcd(0x27, 16, 2);
char namaHari[7][12] = {"Minggu", "Senin", "Selasa", "Rabu", "Kamis", "Jumat", "Sabtu"};
void setup () {
  Serial.begin(9600);
  if (! rtc.begin()) {
    Serial.println("RTC TIDAK TERBACA");
    while (1);
  }
  if (! rtc.isrunning()) {
    Serial.println("RTC is NOT running!");
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));//update rtc dari waktu komputer
  }
  lcd.init();
  lcd.backlight();
}
void loop () {
  lcd.setCursor(0, 0);
    DateTime now = rtc.now();
    lcd.print(namaHari[now.dayOfTheWeek()]);  
    lcd.print(',');    
    lcd.print(now.day(), DEC);
    lcd.print('/');
    lcd.print(now.month(), DEC);
    lcd.print('/');
    lcd.print(now.year(), DEC);
    lcd.print(" ");   
    lcd.setCursor(0, 1);
    lcd.print(now.hour(), DEC);
    lcd.print(':');
    lcd.print(now.minute(), DEC);
    lcd.print(':');
    lcd.print(now.second(), DEC);
}