Problem on connection from computer to machine with serial port.(windows application)

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when i try to connect with machine from setup(exe) then it gives error and hang setup, it is not all time but some time it should be connect and some times gives error.

when i try same with asp.net platform, like that is run by asp.net code at that time no any error is occurs.(it works fine).

What I have tried:

C#

private void serialPort_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            try
            {             
                Thread.Sleep(10);
                _rxString = "";
                _rxString = serialPort.ReadExisting();
                                         
                this.Invoke(new EventHandler(StartUTM));
              
               }
            catch (Exception ex)
            { 
                log.Error("Error", ex);
            }

Posted 18-Feb-18 22:08pm

Vibhusha Devani

Updated 18-Feb-18 22:25pm

RickZeeland

v2

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OriginalGriff 19-Feb-18 4:24am

And what error do you get?

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RickZeeland · Answer 1 · 2018-02-18T22:32:00

I think you need a try ... catch around the part that initializes serialPort, and use the sender object, something like this:

var serialPort = new SerialPort(Rs232Port);

        private static void SerialDataReceivedHandler(object sender, SerialDataReceivedEventArgs e)
        {
            try
            {
                var sp = (SerialPort)sender;
                var message = sp.ReadExisting();
                Debug.Print("Serial data received: " + message);
            }
            catch (Exception ex)
            {
                Debug.Print(@"SerialDataReceivedHandler() " + ex.Message);
            }
        }