// Importing required libraries
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#define pitch 300
int red=2;
int green=3;
int PIR=13;
int alarm=10;

// Initialize the LCD display (16x2) with I2C address 0x27
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  // put your setup code here, to run once:
  // Initialize the serial communication for debugging purposes
  Serial.begin(115200);

pinMode(red, OUTPUT);
pinMode(green, OUTPUT);
pinMode(PIR, INPUT);
pinMode(alarm, OUTPUT);

// Initialize the LCD display
lcd.init();
lcd.backlight();
lcd.clear();

// Display a welcome message
lcd.setCursor(0, 0);
lcd.print("Welcome!");
delay(2000);
lcd.clear();
}

void loop() {
  // put your main code here, to run repeatedly:
  int pirState = digitalRead(PIR);

  if (pirState == HIGH) {
      digitalWrite(red, HIGH);
      digitalWrite(green, LOW);
      tone(alarm,pitch);
      delay(600);//delays the frequency at which the alarm is heard
      digitalWrite(red, LOW);
       digitalWrite(green, LOW);
  noTone(alarm);
  delay(600);

    // Display the message on the LCD display
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Motion Detected!");

    // Optional: print a message to the serial monitor
    Serial.println("Motion Detected!");
    }
    else {
      digitalWrite(red, LOW);
      digitalWrite(green, HIGH);
  noTone(alarm);

    // Display "Motion Not Detected" message on the LCD
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Motion Not Detected");
    Serial.println("Motion Not Detected!");
}

}