#include <Wire.h>
#include "RTClib.h"
#include <LiquidCrystal.h>
LiquidCrystal lcd(12,11,5,4,3,2);
RTC_DS3231 rtc;
char namaHari [7][12]={"Ahad", "Senin", "Selasa", "Rabu", "Kamis", "Jumat", "Sabtu"};

void setup() 
{
pinMode(7, OUTPUT);
lcd.begin (20,4);
rtc.begin();
if(rtc.lostPower()) {
rtc.adjust(DateTime(F(__DATE__),F(__TIME__)));
}
lcd.setCursor(0,0);
lcd.print ("JAM DIGITAL");
delay(1000);
lcd.setCursor(0,1);
lcd.print("LAB LISTRIK A");
delay(1000);
lcd.clear();
}

void loop() {

DateTime now = rtc.now();
lcd.setCursor(2,0);
lcd.print (namaHari[now.dayOfTheWeek()]);
lcd.print(",");
printAngka(now.day());
lcd.print("-");
printAngka(now.month());
lcd.print("-");
printAngka(now.year());

lcd.setCursor(5,1);
printAngka(now.hour());
lcd.print(":");
printAngka(now.minute());
lcd.print(":");
printAngka(now.second()),tone(10,1000,50);

lcd.setCursor(2,3);
lcd.print("SMKN 2 SURAKARTA ");
delay(1000);
}
void printAngka(int digits){ 
if(digits<10){ 
lcd.print("0");
lcd.print(digits);
}
else lcd.print (digits);
}