I am quite familiar with the intricacies of communication code. I have written a number of serial drivers for embedded systems over the past 20 years or so. My use of C# has been limited to writing "quick & dirty" utilities for testing my embedded systems. In this case, my code was working fine - I was just seeking a better understanding of the SerialPort class which did not behave as I expected and the Microsoft documentation for it is shallow at best.

-- Regards, Ken I AM

I agree - not only more readable, but the line

#define USE_MY_SPECIAL_DEBUG_VALUE

can be commented or uncommented with one mouse click - no keystrokes required!

-- Regards, Ken I AM

Thanks for the pointer.

-- Regards, Ken I AM

In my current C# project, I am using an instance of the SerialPort class. I wanted to examine each character as it came in, so I registered a handler for the DataReceived event and set the ReceivedBytesThreshold property to 1. With these settings, I expected that the event handler would be called for each character received but I find that it only gets called once for every 5-8 characters. This is good for communication efficiency, but for what I want to do, I have to loop through the received characters in my event handler. Does anybody know if this is the expected behavior of this class?