I also installed SWR Plotter to use it with my Flex 3000 but I am not sure which COM port has to be used for connection to PSDR.
Plotter's manual does not explain it.
All comments/suggestions about this matter will be appreciated.
I got one 10 meter plot out of the software.
Worked pretty well. Very simple to use.
I lost my 6500 audio so had to restart the radio and smartsdr to get it back.
Going to email the authors.
It has great promise.
Connected the flexradio to switch and to router not direct.