void setup() {
  Serial.begin(115200);
  while (!Serial) { ; }  // wait for USB CDC to initialize
}

void loop() {
  Serial.println("XIAO RP2040 - status OK");

  if (Serial.available()) {
    String cmd = Serial.readStringUntil('\n');
    Serial.print("Received command: ");
    Serial.println(cmd);
  }

  delay(1000);
}