MQTT config with auto discovery

Add-ons Bindings
1

I always configured my MQTT things & items via textual config, but with openHAB3 in mind, I wanted to test more config via GUI (in openHAB3).
On my Blitzwolf powersocket (flashed with Tasmota) I enabled the homeassistant option (Setoption19). The device is immediately recognized and appears in my inbox. I add it as a Thing. I select an equipement (room) in the Model window and choose Create Equipment from a Thing. In the next window I see all my available channels:

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I configure one of the channels (to power on/off):
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I can now change the state of the power socket via openHAB, but when I change it on the device itselves (hardware button of webgui), the state doesn’t change in openHAB. I can’t find any option to add a ‘MQTT State Topic’ when using the HomeAssistant MQTT Component

2

That looks like there is either a bug in the binding or a bug in the device. My understanding is it should recognize and subscribe to the state channel as well.

3

I’ve tested it with another device (same type), but with an older Tasmota version, same issue. Will check tomorrow with a Sonoff Basic.

4

Check your logs for messages, I found the binding would not work fully unless a certain transform was installed that the binding requires. After doing this the state updated perfectly with Tasmota devices.

5

The Jinja transformation is indeed the issue, but after installing and restarting openHAB, i keep getting the message

2020-12-12 12:17:23.606 [WARN ] [t.generic.ChannelStateTransformation] - Transformation service JINJA for pattern {{value_json.POWER}} not found!
2020-12-12 12:19:25.258 [WARN ] [t.generic.ChannelStateTransformation] - Transformation service JINJA for pattern {{value_json['ENERGY']['ReactivePower']}} not found!
2020-12-12 12:19:25.258 [WARN ] [t.generic.ChannelStateTransformation] - Transformation service JINJA for pattern {{value_json['ENERGY']['TotalStartTime']}} not found!
2020-12-12 12:19:25.258 [WARN ] [t.generic.ChannelStateTransformation] - Transformation service JINJA for pattern {{value_json['ENERGY']['ApparentPower']}} not found!
2020-12-12 12:19:25.260 [WARN ] [t.generic.ChannelStateTransformation] - Transformation service JINJA for pattern {{value_json['ENERGY']['Yesterday']}} not found!

I’ll check if it’s working on v2.5.10

6

remove the thing and re-add now you have the transform installed.

7

Still the same…
Tried exaclty the same in v2.5.10, here it’s working fine.
I’ll try to remove all things and items again and retry in v3, maybe even with a clean install.

But I think I will continue using is as before, as I don’t see the benefit of the discovery.

edit: solved by reinstalling… Maybe I screwed up some stuff when testing.