help!!! Serial port receiving data error

[jingqunhu]

++++ Exception System.InvalidOperationException - CLR_E_INVALID_OPERATION (11) ++++
++++ Message:
++++ System.IO.Ports.SerialPort::Read [IP: 0000] ++++
++++ KnxGateWay.Program::SerialDevice_DataReceived [IP: 0041] ++++
++++ System.IO.Ports.SerialPort::OnSerialDataReceivedInternal [IP: 0029] ++++
++++ System.IO.Ports.SerialDeviceEventListener::OnEvent [IP: 002e] ++++
++++ nanoFramework.Runtime.Events.EventSink::ProcessEvent [IP: 0023] ++++
++++ nanoFramework.Runtime.Events.EventSink::EventDispatchCallback [IP: 0014] ++++
接收数据异常,Exception was thrown: System.InvalidOperationException,System.IO.Ports.SerialPort::Read
KnxGateWay.Program::SerialDevice_DataReceived
System.IO.Ports.SerialPort::OnSerialDataReceivedInternal
System.IO.Ports.SerialDeviceEventListener::OnEvent
nanoFramework.Runtime.Events.EventSink::ProcessEvent
nanoFramework.Runtime.Events.EventSink::EventDispatchCallback

Connected to:
ESP32 (ESP32-D0WD-V3 (revision v3.1))
Features WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None
Flash size 8MB unknown from (manufacturer 0x161 device 0x16407)
PSRAM: undetermined
Crystal 40MHz
MAC E8:6B:EA:C2:32:74

Configuration.SetPinFunction(32, DeviceFunction.COM2_TX);
            Configuration.SetPinFunction(33, DeviceFunction.COM2_RX);
 
            _serialDevice = new SerialPort("COM2");

            _serialDevice.BaudRate = 19200;
            _serialDevice.Parity = Parity.Even;
            _serialDevice.StopBits = StopBits.One;
            _serialDevice.Handshake = Handshake.None;
            _serialDevice.DataBits = 8;

            _serialDevice.ReadBufferSize = 2048;
            _serialDevice.DataReceived += SerialDevice_DataReceived;
            _serialDevice.Open();


/// <summary>
        /// 接收串口信息
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private static void SerialDevice_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            try
            {
                if (true)
                {
                    SerialPort serialDevice = (SerialPort)sender;
                    if (e.EventType == SerialData.Chars)
                    {
                        //Debug.WriteLine("rx:" + serialDevice.BytesToRead.ToString());
                        if (serialDevice.BytesToRead > 0)
                        {
                            var len = serialDevice.Read(tempBuffer, bufferOffset, serialDevice.BytesToRead);
                            //temp[0] = (byte)len;
                            //Array.Copy(tempBuffer, 0, temp, 0, temp.Length);
                            Debug.WriteLine(System.DateTime.UtcNow.ToString("HH:mm:ss:fff") + "\t --------> Revice1:\t" + len);

                            bufferLen += len;
                            bufferOffset += len;
                        }
                        else
                        {
                            //中断，完整数据包，包含粘包
                            if (bufferLen > 0 && false)
                            {
                                //一帧数据结束
                                byte[] data = new byte[bufferLen];
                                Array.Copy(tempBuffer, 0, data, 0, data.Length);
                                //重置当前数据帧长度
                                bufferOffset = 0;
                                bufferLen = 0;
                                Debug.WriteLine("Ora Revice:" + BitConverter.ToString(data));

                              
                            }

                        }
                    }
                    else if (e.EventType == SerialData.WatchChar)
                    {
                        Debug.WriteLine("rx watch char");
                    }
                }
            }
            catch (Exception ex)
            {
                //comErrorCount++;
                Debug.Write("接收数据异常," + ex.Message + "," + ex.StackTrace);



            }
        }

[jingqunhu]

When the serial port receives a large amount of data in a relatively short period of time, it is prone to occur

[jingqunhu]

@josesimoes Can you help me see what is causing this?

[jingqunhu]

It's my problem, it has been resolved. Thank you

[josesimoes]

Glad to know that! 👍🏻