* @param portName the port name
* @throws NoSerialPortFoundException the no serial port found exception
*/
private void openPort(String portName) throws NoSerialPortFoundException {
try {
port = new Serial(portName, this.baud);
port.output.write("PXL".getBytes());
} catch (Exception e) {
LOG.log(Level.WARNING, "Failed to open port <"+portName+">", e);
if (port != null) {
port.stop();