#include <Wire.h>
#include <RTClib.h>
#include <LiquidCrystal_I2C.h>

#define buzzer 2 // Pin for the buzzer
LiquidCrystal_I2C lcd(0x27, 16, 2);
RTC_DS3231 rtc;
char daysOfTheWeek[7][12] = {"Sun", "Mon", "Tue", "Wed", "Thurs", "Fri", "Sat"};
int jam, menit, detik;
int tanggal, bulan, tahun;
String hari;

void setup() {
  pinMode(buzzer, OUTPUT);
  Wire.begin();
  lcd.init();
  lcd.backlight();
  lcd.print("yes");
  Serial.begin(9600);
  delay(100);
  lcd.clear();
  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    while (1) delay(10);
  }
}

void loop() {
  // Variabel waktu
  DateTime now = rtc.now();
  jam = now.hour();
  menit = now.minute();
  detik = now.second();
  tanggal = now.day();
  bulan = now.month();
  tahun = now.year();
  hari = daysOfTheWeek[now.dayOfTheWeek()];

  if (jam == alarmHour && menit == alarmMinute && detik == 0) {
    playAlarm(); // untuk setting music
  }

  Serial.println(String() + hari + ", " + tanggal + "-" + bulan + "-" + tahun);
  Serial.println(String() + jam + ":" + menit + ":" + detik);
  Serial.println();
  lcd.setCursor(0, 0);
  lcd.print(String() + hari + "," + tanggal + "-" + bulan + "-" + tahun);
  lcd.setCursor(0, 1);
  lcd.print(String() + jam + ":" + menit + ":" + detik);
  delay(1000);
  lcd.clear();
}

void playAlarm() {
  tone(buzzer, 1046); 
  delay(250);
  tone(buzzer, 1244);   
  delay(250); 
  tone(buzzer, 1400); 
  delay(250); 
  tone(buzzer, 1510); 
  delay(250);
  tone(buzzer, 1400); 
  delay(250);
  tone(buzzer, 1244); 
  delay(250); 
  tone(buzzer, 1046); 
  delay(250); 
  noTone(buzzer);   
  delay(500); 
  tone(buzzer, 932); 
  delay(125);
  tone(buzzer, 1174);   
  delay(125); 
  tone(buzzer, 1046); 
  delay(250);
  noTone(buzzer); 
  delay(500); 
  tone(buzzer, 780); 
  delay(250); 
  tone(buzzer, 525); 
  delay(250); 
  noTone(buzzer); 
  delay(250);
  // second part
  tone(buzzer, 1046); 
  delay(250);
  tone(buzzer, 1244);   
  delay(250); 
  tone(buzzer, 1400); 
  delay(250); 
  tone(buzzer, 1510); 
  delay(250);
  tone(buzzer, 1400); 
  delay(250);
  tone(buzzer, 1244); 
  delay(250);
  tone(buzzer, 1400); 
  delay(250);
  noTone(buzzer);   
  delay(750);
  // fast part
  tone(buzzer, 1510); 
  delay(125);
  tone(buzzer, 1400); 
  delay(125);
  tone(buzzer, 1244); 
  delay(125);
  tone(buzzer, 1510); 
  delay(125);
  tone(buzzer, 1400); 
  delay(125);
  tone(buzzer, 1244); 
  delay(125);
  tone(buzzer, 1510); 
  delay(125);
  tone(buzzer, 1400); 
  delay(125);
  tone(buzzer, 1244); 
  delay(125);
  tone(buzzer, 1510); 
  delay(125);
  tone(buzzer, 1400); 
  delay(125);
  tone(buzzer, 1244); 
  delay(125);
  tone(buzzer, 1510); 
  delay(125);
  noTone(buzzer); 
  delay(500);
}