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

RTC_DS3231 rtc;

const int relayPin = 2; // Digital pin connected to the relay module

void setup() {
  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!");
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }

  pinMode(relayPin, OUTPUT);
}

void loop() {
  DateTime now = rtc.now();
  
  // Check if it's time to ring the bell
  if ((now.hour() == 9 && (now.minute() == 0 || now.minute() == 10)) ||
      (now.hour() == 10 && (now.minute() == 0 || now.minute() == 50)) ||
      (now.hour() == 11 && (now.minute() == 0 || now.minute() == 50)) ||
      (now.hour() == 12 && now.minute() == 40) ||
      (now.hour() == 13 && now.minute() == 20)) {
    ringBell();
    delay(1000); // Add a delay to prevent multiple bell rings at the same time
  }

  delay(1000); // Wait for 1 second before checking again
}

void ringBell() {
  digitalWrite(relayPin, HIGH); // Turn on the relay, powering the buzzer
  delay(500); // Adjust the duration of the bell sound (in milliseconds) as needed
  digitalWrite(relayPin, LOW); // Turn off the relay
}