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

int LED_PIN = 19;      // Input pin for LED
int PIR_PIN = 4;       // Input pin for PIR sensor
int BUZZER_PIN = 2;    // Input pin for Buzzer
LiquidCrystal_I2C lcd(0x27, 16, 2); // Adjust the address based on your LCD module

void setup() {
  Serial.begin(115200);
  pinMode(PIR_PIN, INPUT);    // Declare PIR sensor as input
  pinMode(LED_PIN, OUTPUT);   // Declare LED as output
  pinMode(BUZZER_PIN, OUTPUT); // Declare Buzzer as output
  lcd.begin(16, 2); // Initialize the LCD with 16 columns and 2 rows
}

void loop() {
  int pirValue = digitalRead(PIR_PIN); // Read input value

  if (pirValue == HIGH) {    // Check if the input is HIGH
    digitalWrite(LED_PIN, HIGH);    // Turn LED ON
    Serial.println("Motion Detected");
  
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Motion Detected!");

    activateBuzzer();

    delay(1000);
  } 
  else {
    digitalWrite(LED_PIN, LOW); // Turn LED OFF
    Serial.println("No Motion Detected");
    
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("No Motion Detected");

    deactivateBuzzer();
    
    delay(1000);
  }
}

void activateBuzzer() {
  digitalWrite(BUZZER_PIN, HIGH);  // Turn the Buzzer ON
  // You can add additional actions here if needed
}

void deactivateBuzzer() {
  digitalWrite(BUZZER_PIN, LOW);  // Turn the Buzzer OFF
  // You can add additional actions here if needed
}