void setup() {
  pinMode(15, INPUT);
  Serial1.begin(115200);
  Serial1.println("Hello, Raspberry pi pico!");
}

void loop() {
  int pir=digitalRead(15);
  if (pir == HIGH)
  {
    Serial1.println("Movement detected");
    delay(500);
  }
  else
  {
    Serial1.println("No Movement detected");
    delay(500);
  }
}