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

// Initialize the RTC and LCD. Adjust the LCD address as needed (commonly 0x27 or 0x3F)
RTC_DS3231 rtc;
LiquidCrystal_I2C lcd(0x27,16,2);

const int buzzerPin = 8;

// Set your desired alarm time here
const int alarmHour = 7;
const int alarmMinute = 30;

RTC_DS3231 rtc;

void setup() {
  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
  }

  // This line sets the RTC with an explicit date & time, for example, January 1, 2024, at 00:00:00
  rtc.adjust(DateTime(2024, 1, 1, 0, 0, 0));
}

void setup() {
  pinMode(buzzerPin, OUTPUT);
  Serial.begin(9600);
  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
  }

  if (rtc.lostPower()) {
    Serial.println("RTC lost power, let's set the time!");
    // The following line sets the RTC to the date & time this sketch was compiled
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }
  
  lcd.init(); // initialize the lcd
  lcd.backlight();
}

void loop() {
  DateTime now = rtc.now();
  
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Time: ");
  lcd.print(now.hour(), DEC);
  lcd.print(':');
  lcd.print(now.minute(), DEC);
  
  lcd.setCursor(0,1);
  lcd.print("Alarm: ");
  lcd.print(alarmHour);
  lcd.print(':');
  lcd.print(alarmMinute);

  // Check if current time matches alarm time
  if (now.hour() == alarmHour && now.minute() == alarmMinute) {
    // Sound the alarm for 60 seconds or until a condition to stop it is met
    for(int i = 0; i < 60; i++) {
      digitalWrite(buzzerPin, HIGH);
      delay(500);
      digitalWrite(buzzerPin, LOW);
      delay(500);

      // Here, you can check for a button press to stop the alarm
      // Example: if (digitalRead(stopButtonPin) == HIGH) break;
    }
  }
  // Avoid constantly triggering the alarm when the time is right.
  delay(60000); // Wait a minute before checking again
}