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

void loop() {
  int pir = analogRead(15);
  if(pir = HIGH){
    Serial1.println("Movement detected");
    delay(500);

  } else{
    Serial1.println("No movement detected");
    delay(500);
  }
  
}