Thanks @rossko57.
Having the issues described above I have migrated MQTT binding from 1.x to 2.4
Sonoff switches works fine now. Your Rule was helpful for debug, thanks for that.
Unfortunately I run into a a know bug: Binding-mqtt - 2.5.0.SNAPSHOT; rollershutter command is sent wrong
which prevents Rollershutter type works in Basic UI.
Rollershutter item type publishes:
0 for stop
0 for up
100 for down
You think there might be a workaround for this?
Maybe leaving rollershutter type and use own buttons and Rules or smth like that?
Ma