It would be great if a KNX expert could join in here, in order to avoid having to resort to tedious workarounds like reloading the items file. As someone who doesn’t know anything about KNX, it would seem more correct that if the value has changed somewhere on the KNX side, it ought to be reported soon thereafter to the KNX binding in openHAB, without the need to force a read or other workarounds. My usefulness in that discussion ends here, I’m afraid! 
