C＃串口无法从com端口获取所有数据

Question

您好我正在使用C＃从com端口获取数据。使用Hercules检查数据，请参阅此图像以比较config：

在Hescules数据显示格式：FF ?? ZZ，但在C＃中，日期只获得：FF

这是C＃代码：

SerialPort _serialPort;

        public Form1()
        {
            InitializeComponent();
            //ShowNetworkInterfaces();
            getDataFromComPort();
        }

        private void getDataFromComPort()
        {
            try
            {
                _serialPort = new SerialPort("COM3");

                _serialPort.BaudRate = 9600;
                _serialPort.Parity = Parity.None;
                //_serialPort.StopBits = StopBits.One;
                _serialPort.DataBits = 8;
                _serialPort.Handshake = Handshake.None;
                _serialPort.DataReceived += new SerialDataReceivedEventHandler(sp_DataReceived);
                _serialPort.NewLine = "\n";
                //serialPort1.ReceivedBytesThreshold = 9;
                //serialPort1.RtsEnable = true;
                //serialPort1.DtrEnable = true;
                //_serialPort.ReadTimeout = 500;
                //_serialPort.WriteTimeout = 500;

                if (_serialPort.IsOpen)
                {
                    _serialPort.Close();
                }
                _serialPort.Open();
            }
            catch (Exception e)
            {
                Console.WriteLine("error : " + e.Message);
            }
        }

void sp_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            if (tbText.InvokeRequired)
            {
                tbText.Invoke(new SerialDataReceivedEventHandler(sp_DataReceived), sender, e);
            }
            else
            {
                try
                {
                    string data = _serialPort.ReadLine();
                    Console.WriteLine("data: " + data);
                    tbText.Text = data;
                }
                catch (Exception ex)
                {
                    Console.WriteLine("error: " + ex.Message);

                }
            }
        }

似乎数据不是按行读取的。