There are currently three options to find out SOMA Connect software version
Using the Smart Shades app
Starting with the latest version of SOMA Connect, 2.2.0, and the latest Smart Shades app version 2.2.0, the SOMA Connect version is shown in the Smart Shades app on the SOMA Connect screen.
Using the HTTP API
You can access the SOMA Connect version from
http://<soma connect IP address>:3000/list_devices
The output will be similar to
{"result":"success","version":"<version number>","shades":[...]}
You can find out the SOMA Connect IP address from your router settings.
Using the command line
You can access the SOMA Connect version after logging in to SOMA Connect and issuing the following command
sudo apt-cache policy soma-connect
The output will be similar to
soma-connect:
Installed: <version number>
...