By trial & error I found out that in some cases I need to use:
states('sensor.xyz')
instead of:
states.sensor.xyz
I spent some hours to find the documentation about ‘states’, but didn’t find a clear description. Which notation should I use in which situation?
That should cover it all fairly well, along with State Objects - Home Assistant
The second of those you wrote returns a state object, the first returns the actual state of the entity.
Thnx!!! I am working a month now with HA (coming from Domoticz), but I have to say that I still struggle with the HA documentation and its examples.