System.IO.Ports.SerialPort and Multithreading

Question

I have some SerialPort code that constantly needs to read data from a serial interface (for example COM1). But this seems to be very CPU intensive and if the user moves the wind

Answer 1

You should rewrite port_DataReceived procedure to read data until port.BytesToRead is greater then zero, like this:

private void port_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
        var port = (SerialPort)sender;
        while (port.BytesToRead > 0)
        {
            int byte_count = port.BytesToRead;
            byte[] buffer = new byte[byte_count];

            int read_count = port.Read(buffer, 0, byte_count);

            // PROCESS DATA HERE

        }
}

Also I would recommend you to just insert data in queue list in procedure port_DataReceived, and perform data processing in separate thread.