Hi,
SHUTTERSTOP, -OPEN,-CLOSE are no payload, but Part of the command in Tasmota.
To use it in Openhab nomenclature, you have to “missuse” the “backlog” command and then use SHUTTERSTOP, -OPEN,-CLOSE as payload.
So just add “/backlog” to your MQTT command in channels and it should work.
At least it does for me 
2 Likes