I wanted to use the
previousState method to get of course the previous state
But I get the error “There is no persistence service configured!”.
Sadly the docs about peristence (https://www.openhab.org/docs/tutorial/persistence.html) are empty
So what exaclty are the persistence services?
There a lot of different types of persistence services to install.
And do I need a persistence service if I want to retrieve the old value of an item?