const int pirPin = 2;    // PIR sensor output pin
const int relayPin = 13;  // Relay module control pin

void setup() {
  pinMode(pirPin, INPUT);
  pinMode(relayPin, OUTPUT);
}

void loop() {
  int pirState = digitalRead(pirPin);
  
  if (pirState == HIGH) {
    // Motion detected, turn on the relay
    digitalWrite(relayPin, HIGH);
    delay(1000);  // Keep the relay on for 1 second (adjust as needed)
  } else {
    // No motion detected, turn off the relay
    digitalWrite(relayPin, LOW);
  }
}