#define PIR_SENSOR_PIN 2   // Pin connected to the PIR sensor output
#define LED_PIN 15          // Pin connected to the LED
#define BUZZER_PIN 4      // Pin connected to the Buzzer

void setup() {
  Serial.begin(115200);    // Initialize serial communication
  pinMode(PIR_SENSOR_PIN, INPUT);   // Set PIR sensor pin as input
  pinMode(LED_PIN, OUTPUT);        // Set LED pin as output
  pinMode(BUZZER_PIN, OUTPUT);     // Set Buzzer pin as output

  digitalWrite(LED_PIN, LOW);      // Ensure LED is off initially
  digitalWrite(BUZZER_PIN, LOW);   // Ensure Buzzer is off initially
}

void loop() {
  int sensorValue = digitalRead(PIR_SENSOR_PIN);  // Read the PIR sensor value

  if (sensorValue == HIGH) {
    // Motion detected
    Serial.println("Motion detected!");
    
    // Turn on LED and buzzer
    digitalWrite(LED_PIN, HIGH);
    digitalWrite(BUZZER_PIN, HIGH);
    
    delay(1000);  // Keep the alarm on for 1 second

    // Turn off LED and buzzer
    digitalWrite(LED_PIN, LOW);
    digitalWrite(BUZZER_PIN, LOW);
  } else {
    // No motion detected
    Serial.println("No motion detected");
  }

  delay(500);  // Check the PIR sensor every 500 milliseconds
}