Very good UI !!!
But what i’m missing. It is not possible to Color the state of an “UNDEF” item. I think, in practice this is neccessary (to show if a device has stopped working etc.)
So each widget connected to a sensor shout have "inactive,active and UNDEF) state configuration. Or with other words: there shoud be an additional state “default” which means not active or inactive. (Same as in Basic-UI)