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

Your last conclusion, that the event runs on the Main thread, may not be true for Windows App. Don't test this in a Console.

The proper way to tune this is:

• set a large enough buffer, although the minimum 4096 is usually Ok

• set the ReceivedBytesThreshold as high as tolerable (and do it before the Open())

• do as little as possible in the Received event, pass the data to a Queue or MemoryStream if you need more time