Hey together,
I am a little confused regarding this topic and I wasn’t successful with Google / ChatGPT…
I have HA running with MQTT (Mosquitto broker).
In HA, I have a few lights etc. that I would like to control over MQTT from Loxone, for example the light with the entity “light.bathroom”
So I would like to send the state from Loxone to HA to turn on “light.bathroom” over MQTT:
MQTT Topic: homeassistant/light/bathroom/set
{"state": "ON"}
On the HA MQTT monitor, I can see the new state, but nothing happens (obviously, would be too easy 
)
What do I need on the HA side to process this state? Do I need an automation, do I need to set something up in my configuration.yaml?
I don’t know where to start, so any hint is appreceated 
Thanks!