I’m running six Shelly Plug S and all working well with Home Assistant, but I could definitely play a bit more with the data it’s drawing from them. Only issue to date was that I bought a new clothes iron and it would trip the plug as it was over the 2.5 kW the plug is rated for, might just be something to keep in mind. The in-wall relays may go higher, I’m not sure.

Glad you got it sorted, and thanks for sharing the solution. I might see if I can remove privileged from mine in that case.

I'm on x86, but the below relevant lines have mine working:

–privileged

–group-add keep-groups

–device /dev/ttyUSB0:/dev/ttyUSB0

I also had to add my user that runs the container to group "dialout" as that owns the ttyUSB0 device. Keep in mind to log out and back in with this user after adding the group to apply the change.

Hope that helps!