OH3 User Interface: From beginner for beginners

[hmerk (Hans-Jörg Merk)]

@Ursusprimus

the number of running lights is derived from an item whose value is calculated with a rule (see below YMAL code)

You might check the following, makes your rules obsolete…

CustomWidget PopOver - Item from parameter does not use the configuration of the specific widget, but the last widget

Sure That’s a good question, since the solution is not that obvious in openHAB3 When checking the documentation for aggregation functions you may have noticed the COUNT() aggregation: Unfortunately, the COUNT() aggregator is not selectable in the MainUI of openHAB3. BUT: You can work around that limitation by importing group items with COUNT() aggregators from textual configuration: [image] This essentially adds two groups where one counts for empty and another count for …