//Library yang digunakan
#include <Wire.h>
#include "RTClib.h"
#include <LiquidCrystal.h>

// Membuat objek LCD dan RTC
LiquidCrystal lcd(2, 3, 4, 5, 6, 7);
RTC_DS3231 rtc;

//Array nama-nama hari yang akan ditampilkan
char nameDay[7][12] = {"Minggu", "Senin", "Selasa", "Rabu", "Kamis", "Jumat", "Sabtu"};

//Definisi PIN
int btna = 11; //PIN untuk button mematikan alarm
int btnl = 12; //PIN untuk button mengontrol lampu

//Variabel untuk membaca status komponen
int statebtna = 0;
int statebtnl = 0;
bool ledstate = false; //status awal LED mati

void setup() 
{
 //inisialisasi PIN
 pinMode(1, OUTPUT);
 pinMode(8, OUTPUT);
 pinMode(12, INPUT_PULLUP);
 pinMode(11, INPUT);

 //inisialisasi LED & RTC
 lcd.begin(20, 4);
 lcd.setCursor(0,1);
 lcd.print("    JAM  DIGITAL   ");
 lcd.setCursor(0,2);
 lcd.print("    SMART  CLOCK   ");
 delay(1000);
 lcd.clear();
 rtc.begin();


 // Set waktu RTC jika daya hilang
 if (rtc.lostPower()) {
 rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
 }
}

void loop() {

 //Membaca status button
 statebtna = digitalRead (btna);
 statebtnl = digitalRead (btnl);

 //Membaca waktu dari RTC
 DateTime now = rtc.now();

 //Menampilkan informasi di LCD
 lcd.setCursor(2,0);
 lcd.print (nameDay[now.dayOfTheWeek()]);
 lcd.print (",");
 printAngka (now.day());
 lcd.print (",");
 printAngka (now.month());
 lcd.print (",");
 printAngka (now.year());
 lcd.setCursor(6,1);
 printAngka (now.hour());
 lcd.print (",");
 printAngka (now.minute());
 lcd.print (",");
 printAngka (now.second());
 lcd.setCursor (1,3);
 lcd.print (" BALI - INDONESIA ");
 
 //Mematikan LED secara otomatis pada jam 22.00
 if (now.hour() == 22 && now.minute() == 0 && now.second() == 0){
    digitalWrite (1, LOW);
    ledstate = false;
  }

 //Menghidupkan LED secara otomatis pada jam 05.00
 if (now.hour() == 5 && now.minute() == 0 && now.second() == 0){
    digitalWrite (1, HIGH);
    ledstate = true;
  }
 
 //Mengontrol LED secara manual dengan push button
 if (statebtnl == LOW){
    ledstate = !ledstate;
    digitalWrite (1, ledstate);
 }

 //Mengontrol alarm
 if (now.hour() == 5){
    tone(8,1000,50); //Alarm otomatis hidup pada jam 05.00
    if (now.minute() >= 5){
      tone(8,0,50); //Alarm otomatis mati jika tidak ada interaksi setelah 5 menit
    }
    else if (statebtna == HIGH){
      tone(8,0,50); //Alarm akan mati jika button ditekan
    }
 }
 delay(250);
}

 //Mendefinisikan fungsi printAngka
 void printAngka (int digits){
  if (digits < 10){
    lcd.print("0");
    lcd.print(digits);
 }
 else lcd.print(digits);
 }