const int pirSensorPin = 15;

void setup() {
  Serial1.begin(115200);
  pinMode(pirSensorPin, INPUT);
}

void loop() {
  int sensorValue = digitalRead(pirSensorPin);

  if (sensorValue == HIGH) {
    Serial1.println("Motion detected");
  } else {
    Serial1.println("No motion");
  }

  delay(1000);
}