Need a "Hello World" via Serial example about docs

[IanBoyanZhang]

Hi @adamvoss,

Hopefully, this is what you are looking for or more practical with CAN reading?

void setup() {
  // put your setup code here, to run once:
  SerialUSB.begin(0);
  pinMode(DS2, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  while (!SerialUSB.available()) {
    return;  
  }
  serialUSBEvent();
  // USB serial can be really fast, mb/s.
  delay(500);
}

void serialUSBEvent() {
  String str = "Hello Word!\n";
  SerialUSB.write(str.c_str())  ;
}

I tried this quickly with screen /dev/xxx.yourusbport on OS X. For some reason, I have to send a key press to trigger usb event. After that the communication is fine.