which of the 2 examples below is closer to what you want to achieve?
It may be better for you to type up a draft rule so we can understand the concept.
You have a temperature sensor that reads the internal temp of your house and it has a
refreshInterval=10 (i.e. state updates with new reading every 10 secs)
Now, you want to trigger another Item that controls the boiler and turn it on if the temp will go below 20 and off if the temp will goes above 22.
Same temp sensor as above.
Now, you want to update another proxy Item with certain values based on the results of the first one.
e.g if temp goes below 20 then update proxy with String “Cold”, else between 20 and 22 update with String “Moderate”, else with “Hot”
edit: You cannot control the updates of the temp sensor Item itself based on such conditions since the Item will get “raw” updates from the binding. Unless of course you can implement such logic in the endpoint device itself.