void setup() {
  Serial.begin(115200);      // Prepare serial port for use
  pinMode(8, INPUT);         // Set Arduino pin 8 to INPUT mode
}

void loop() {
  int sensorValue = digitalRead(8);  // Read PIR sensor value
  Serial.println(sensorValue);       // Print PIR sensor value to serial port
  delay(500);                        // Wait 500 milliseconds
}