// PIR sensor pin
const int pirPin = 3;

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

  // Configure PIR sensor pin as input
  pinMode(pirPin, INPUT);
}

void loop() {
  // Read the PIR sensor value
  int pirValue = digitalRead(pirPin);

  // Check if an object is detected
  if (pirValue == HIGH) {
    Serial.println("Object detected!");
  } else {
    Serial.println("No object detected.");
  }

  // Delay before next reading
  delay(1000);
}