Dear Torsten
I am trying EESDR3 with a remote connection but having the rig in front of me. I use a RPI4 server.
SO far SPLIT function seems to work or at least you can activate it.
Unfortunately, CW does not work, connecting the paddle to the rig. This can make sense because this won't be the configuration of a remote station.
It's true that the TUNE function does to work properly when on remote, and I mean that no SWR indication is given. I don't know if this is a bug or I am missing something.
I am not sure if my comments help you or you are maybe already ahead of the situation I describe.
Kind regards,
Stefan