I’ve just released version 0.2.0 of the pimatic-echo plugin, which adds support for dimming your lights, as this was the most requested feature of all pimatic-echo users.
After updating, you must remove all existing devices from pimatic and then rescan for your devices. You will notice that the device type changes from “WeMo Switch” to “Lux Light”.
As this feature took me some significant amount of time, please consider a donation. pimatic-echo is free of charge and it will stay free, so please support my work. Thanks!