Set up problems with GMC-800

I'm currently trying to substation with my GMC-800 and I'm getting nowhere. I've tried using RADlog but I can't correctly adjust the settings to get correct readouts.I've downloaded the software and my PC runs windows 11. Keeps giving the zero CPM, then saying that there is a COM port error. Any suggestions?

First check using TaskManager that you only have one instance of RadLog running or you will get COM port errors (ask me how I know..) Then double check you have the ports settings correct (matching) on both PC and GMC-800.

If the firmware is anything like their earlier GMC-300 series of detectors then the root cause may be the detector. I tested the serial communication with 100's of tests and eventually came to the conclusion that the firmware was written with blocking states embedded within it. If you make a request the machine that is attempting to read the detector has to be very patient. I had to add extra delays and timeout's in my Raspberry Pi code to make it work.

You would think that modern software would be written with a real time interrupt handler. Again, from my experience the GMC firmware leaves a lot to be desired. I ended up hand coding my PiRadMon software to work with the detector. Your mileage may vary.