private void setupComPort()
        {
            _serialPort.DataBits = 8;
            _serialPort.Parity = Parity.None;
            _serialPort.DataBits = 8;
            _serialPort.StopBits = StopBits.Two;
            _serialPort.PortName = "COM40";     //hard coded COM40
            _serialPort.BaudRate = 9600;
            _serialPort.DataReceived += new SerialDataReceivedEventHandler(DataReceivedHandler);


        }