#include <Wire.h>
#include "LiquidCrystal_I2C.h"
#include <RTClib.h>
#define buzzer 4

RTC_DS1307 rtc;

LiquidCrystal_I2C lcd(0x27, 16, 2);

char namaHari[7][12] = {"Minggu", "Senin", "Selasa", "Rabu", "Kamis", "Jumat", "Sabtu"};

void setup() {
  pinMode(buzzer, OUTPUT);
  Serial.begin(9600);
  Wire.begin();

  if (! rtc.begin()) 
  {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    abort();
  }

  lcd.init();
  lcd.backlight();
  lcd.print("");
}

void loop() 
{
  DateTime now = rtc.now();
  lcd.setCursor(1,0);
  lcd.print(namaHari[now.dayOfTheWeek()]);
  lcd.print(",");
  printAngka(now.day());
  lcd.print("-");
  printAngka(now.month());
  lcd.print("-");
  printAngka(now.year());  
    
  lcd.setCursor(4,1);
  printAngka(now.hour());
  lcd.print(":");
  printAngka(now.minute());
  lcd.print(":");
  printAngka(now.second());
  
  delay(2000);
  //Mensetting waktu alarm berbunyi
  if (now.hour() == 13 && now.minute() == 38 ){
    buzzer_on();
  }

}
void printAngka(int digits){
   if(digits < 10){
   lcd.print('0');
   lcd.print(digits);
   }
   else lcd.print(digits);
 }

 void buzzer_on() {
    tone(buzzer, 10000); 
    delay(500);        
    noTone(buzzer);     
    //digitalWrite(buzzer, HIGH); 
    delay(500);      
}