#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() {
  // put your setup code here, to run once:
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(100);
lcd.setCursor(0,1);
lcd.print("Lab Listrik ");
delay(100);
lcd.clear();
}
void loop() {
  // put your main code here, to run repeatedly:
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 ('o');
lcd.print(digits);
} else lcd.print (digits); }