int pirPin = 34; 
int ledPin = 21; 

void setup() {
  Serial.begin(115200);
  Serial.println("PIR Motion Sensor with LED Example");
  pinMode(pirPin, INPUT);
  pinMode(ledPin, OUTPUT);
}

void loop() {

  int motionDetected = digitalRead(pirPin);
  Serial.print("Motion Detected: ");
  Serial.println(motionDetected);
  if (motionDetected == HIGH) { 
   
    digitalWrite(ledPin, HIGH); 
    Serial.println("LED is ON");
  } else {
 
    digitalWrite(ledPin, LOW);  
    Serial.println("LED is OFF");
  }
  delay(500); 
}