As you will overwrite the channel-info, you don’t need it from the binding. I think this can end in an invite loop. (Not really , as you’re using "postUpdate). But if you want to have the channel-information too, better use a Dummy-Item.
To show specific information you have to use Formatting in the Label. Either in your .items.file or in your SiteMap/HABPanel.
Hey, the following question might sound “stupid” but
how can I create a item without adding it to a thing?
For now I added my Temp_update item to the Temp. sensor, but I can’t configure the item as I want to…
You must have in mind that I’m very new to all this.