Hi,
my first question. Coming from medium sized ioBroker installation I just installed HA to get an impression.
I’m trying to install 2 Tasmota plugs (Gosund and Nous, both setup with MQTT) with latest Tasmota firmware.
Have installed MQTT, MQTT-Explorer and Tasmota, with MQTT explorer I get answers from the devices.
I can switch them on and off, i.e.
Tasmota recognizes the plugs and “installs” them. I can even position the devices and entities on a dashboard. But when I click on them, it says thery are “unavailable” (“nicht verfügbar” in German). S. screenshot.
Where could I look up what’s wrong?
Thank you
Hi,
I suspect you’ve already done the checks I’d usually reccomend, but just in case, here’s a basic check-list:
New installs of Tasmota should default to SetOption19 0, and you’ve already implied the HASS Tasmota integration is installed and was probably working.
If you are confident with MQTT Explorer, there’s three parts to HA - the published Tasmota Discovery properties, the cmnd/ topic to change state, and the tele/ reply with the actual state.
- Greyed out entities suggest the Discovery retained topic was received (delete the retained topic
tasmota/discovery/uid, and HA will change immediately to remove the entities). - Control HA → Tasmota suggests the
cmnd/topic is getting through and is valid - No change of state in the HA GUI suggests something wrong with the
tele/state being published back.
(Buggy custom MQTT code can show this as a “sticky switch” - it changes state, but jumps back without confirmation.)
I’d delete the retained discovery topic tasmota/discovery/uid/ (older kit would be HA discovery homeassistant/), and HA will change immediately. Restart the device and watch what happens as discovery gets published to the broker again.
Do you have a “flat” IPv4 LAN? (i.e. no VLANs nor routing)
HA can sometimes break MQTT with IPv6, but has been getting better.
ISTR a recent MQTT entity change was reverted in a recent release, but my Tasmota and custom MQTT devices seemed to be OK.
(I’ve used openHAB and written custom MQTT devices so have a lot more links if you need to go deeper.)
If this helps, 
this post!
2 Likes
Hi James,
thank you very much for your detailed help!
Both plugs are working now! It’s a little embarrassing - but when stepping through all of your instructions I stumbled across the full topic in the MQTT settings of the plugs, both were missing the ending ‘/’:
/%prefix%/%topic%/
Thank you again!
Friedhelm