#include <Arduino.h>

// Define the pin number for PIR sensor input
#define PIR_PIN 5

void setup() {
  // Initialize serial communication at 9600 baud
  Serial.begin(9600);

  // Set the PIR pin as input
  pinMode(PIR_PIN, INPUT);
}

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

  // Check if motion is detected
  if (pirState == HIGH) {
    Serial.println("Motion detected!");
  } else {
    Serial.println("No motion detected.");
  }

  // Delay for a short period
  delay(500);
}