Nonblocking Reading Usage Example

Non-blocking reading is the default mode used by this library. It can be selected simply by opening the COM port with no other options:

SerialPort comPort = SerialPort.getCommPorts()[0];
comPort.openPort();
try {
   while (true)
   {
      while (comPort.bytesAvailable() == 0)
         Thread.sleep(20);

      byte[] readBuffer = new byte[comPort.bytesAvailable()];
      int numRead = comPort.readBytes(readBuffer, readBuffer.length);
      System.out.println("Read " + numRead + " bytes.");
   }
} catch (Exception e) { e.printStackTrace(); }
comPort.closePort();

If you were already in a different mode of operation, you can enable non-blocking/polling mode by calling the following method at any point in time:

comPort.setComPortTimeouts(SerialPort.TIMEOUT_NONBLOCKING, 0, 0);