Error, disabling serialEvent() for COM8 null (A Solution that worked for me)

Processing Electronics (Arduino, etc.)
3

Hello,

See the reference:

Checking for a null (before data.substring()) will eliminate the error:

void serialEvent (Serial myPort) {
// starts reading data from the Serial Port
// reads the data from the Serial Port up to the character '.' and puts it into the String variable "data".

data = myPort.readStringUntil('.'); // Read the string from the COM port (using '.' as the end-of-string delimiter

if (data != null)
  {
  println(data);
  data = data.substring(0, data.length()-1); // determine the length of the string
  }
}

Tested with an Arduino sending data.
:)