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

RTC_DS3231 rtc;

const int buzzerPin = 13;

//SET ALARM

int AlarmHour=22;
int AlarmMinute=24;
LiquidCrystal lcd(12, 11, 5, 6, 7, 8); // RS, E, D4, D5, D6, D7

void setup() {
  pinMode(buzzerPin, OUTPUT);
  
  lcd.begin(16, 2);
  if (!rtc.begin()) {
    lcd.print("RTC not found!");
    while (1);
  }
}

void loop() {
  DateTime now = rtc.now();

  // Display time on LCD
  lcd.setCursor(0, 0);
  lcd.print("TIME: ");
  if (now.hour() < 10) {
    lcd.print("0"); // Print a space to clear the previous digit
  }
  lcd.print(now.hour(), DEC);
  lcd.print(':');
  if (now.minute() < 10) {
    lcd.print("0"); // Print a space to clear the previous digit
  }
  lcd.print(now.minute(), DEC);
  lcd.print(':');
  if (now.second() < 10) {
    lcd.print("0"); // Print a space to clear the previous digit
  }
  lcd.print(now.second(), DEC);

  lcd.setCursor(0, 1);
  lcd.print("ALARM: ");
  if (AlarmHour < 10) {
    lcd.print("0"); // Print a space to clear the previous digit
  }
  lcd.print(AlarmHour, DEC);
  lcd.print(":");
  if (AlarmMinute < 10) {
    lcd.print("0"); // Print a space to clear the previous digit
  }
  lcd.print(AlarmMinute, DEC);

  // Check if alarm time matches current time
  if (now.hour() == AlarmHour && now.minute() == AlarmMinute && now.second() == 0) {
    triggerAlarm();
  }

  delay(1000);
}


void triggerAlarm() {
  // Function to trigger alarm
  tone(buzzerPin, 1000); // Set buzzer frequency
  delay(1500);  // Buzz for 2 second
  noTone(buzzerPin); // Turn off buzzer
  delay(1000);
  tone(buzzerPin, 1000); // Set buzzer frequency
  delay(1500);  // Buzz for 2 second
  noTone(buzzerPin); // Turn off buzzer
  delay(1000);
  tone(buzzerPin, 1000); // Set buzzer frequency
  delay(1500); // Buzz for 2 second
  noTone(buzzerPin); // Turn off buzzer
}