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

#define pBuzzer 11
#define pButton 4
#define pLed 13
RTC_DS1307 rtc;
LiquidCrystal_I2C lcd(0x27, 16, 2);

void PrintDate();

void setup()
{
  Serial.begin(9600);
  pinMode(pBuzzer, OUTPUT);
  pinMode(pButton, INPUT_PULLUP); 
  pinMode(pLed, OUTPUT);

  lcd.init();
  lcd.backlight();

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

  rtc.adjust(DateTime(2024,6,13,8,13,0));

}

void loop() {

  lcd.clear();
  DateTime date(2024, 6, 13, 8, 14, 0);
  DateTime now = rtc.now();  
  
  if (digitalRead(pButton) == HIGH)
  {
    digitalWrite(pLed, HIGH);
  }

  if (digitalRead(pButton) == LOW)
  {
    digitalWrite(pLed, LOW);
  }

  if(now.day() == date.day() &&
     now.hour() == date.hour() &&
     now.minute() == date.minute())
  {
    int iLevl = 100;
    for(int i = 0; i < 4; i++)
    {
      iLevl *= 2;
      tone (pBuzzer, iLevl);
      delay(500);
    }
    noTone(pBuzzer);

  }

  PrintDate(now);

}

void PrintDate(DateTime now)
{
  lcd.setCursor(0,0);

  lcd.print(now.year());
  lcd.print("/");
  lcd.print(now.month());
  lcd.print("/");
  lcd.print(now.day());
  
  lcd.setCursor(0,1);
  lcd.print(now.hour());
  lcd.print(":");
  lcd.print(now.minute());
  lcd.print(":");
  lcd.print(now.second());

  delay(1000);
}