// Include the required libraries
#include <Arduino.h>

// Define the pin connections
#define PIR_PIN 13    // Pin connected to the output of the PIR motion sensor
#define BUZZER_PIN 12 // Pin connected to the buzzer

// Variables to store the state of the alarm
bool motionDetected = false;

void setup() {
  // Initialize the serial monitor
  Serial.begin(115200);

  // Set the GPIO pins as input and output
  pinMode(PIR_PIN, INPUT);
  pinMode(BUZZER_PIN, OUTPUT);
}

void loop() {
  // Read the state of the PIR sensor
  motionDetected = digitalRead(PIR_PIN);

  // If motion is detected
  if (motionDetected == HIGH) {
    Serial.println("Motion detected!");
    activateAlarm(); // Call the function to activate the alarm
    delay(5000);     // Delay for 5 seconds to avoid continuous triggering
  }
}

void activateAlarm() {
  // Sound the buzzer
  digitalWrite(BUZZER_PIN, HIGH);
  delay(1000); // Sound the buzzer for 1 second
  digitalWrite(BUZZER_PIN, LOW);
}