Serial.write(buf, Len) always returns 0

[NickWaterton]

This function is supposed to return the actual number of bytes written. On the USB (native) port it always returns 0.

[sandeepmistry]

Hi @NickWaterton,

I can confirm this behaviour with the following sketch:

void setup() {
  SerialUSB.begin(9600);

  while(!SerialUSB);
}

void loop() {
  int written = SerialUSB.println("hello");

  SerialUSB.println(written);

  delay(1000);
}

It prints:

hello
0

instead of:

hello
7

I've submitted #143 to resolve this. You can try it out by following these instructions: #143 (comment)