不从车辆跟踪设备获取数据

Question

 if ((tcpClient.Connected == true))
                {
                    int clientCount = Interlocked.Increment(ref clients);

                    NetworkStream clientStream = tcpClient.GetStream();
                    ASCIIEncoding encoder = new ASCIIEncoding();

                    //Console.WriteLine("Client connected. ({0} connected)", clientCount);


                    StringBuilder myCompleteMessage = new StringBuilder();


                    if (clientStream.CanRead)
                    {
                        byte[] myReadBuffer = new byte[1024];

                        int numberOfBytesRead = 0;

                        // Incoming message may be larger than the buffer size.

                        try
                        {
                            do
                            {
                                System.Threading.Thread.Sleep(1000);
                                numberOfBytesRead = clientStream.Read(myReadBuffer, 0, myReadBuffer.Length);

                                myCompleteMessage.AppendFormat("{0}", Encoding.ASCII.GetString(myReadBuffer, 0, numberOfBytesRead));

                            }
                            while (clientStream.DataAvailable);
                        }
                        catch (Exception ex)
                        {
                            tcpClient.Close();

                        }

                    }
                    }

我正在研究车辆跟踪系统。我把这段代码作为listner     我尝试从车辆跟踪设备读取数据当我通过客户端（本地机器/ PC）发送时我获取数据但是它无法从设备读取数据 感谢