Arduino PIR Motion Sensor Code

const int pirPin = 2; // the pin the PIR sensor is connected to

const int ledPin = 9; // the pin the LED is connected to

void setup() {
pinMode(pirPin, INPUT); // set the pin with the PIR sensor as an input
pinMode(ledPin, OUTPUT); // set the pin with the LED as an output
}

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

// check if the PIR sensor is detecting motion
if (pirState == HIGH) {
// turn the LED on
digitalWrite(ledPin, HIGH);
} else {
// turn the LED off
digitalWrite(ledPin, LOW);
}
}