I have many battery powered devices to monitor and I like to update a “LastSeen” Item once the Thing has sent some data to see that the device is still alive. I tried to do this by using the “Thing received update” but it somehow does not trigger. rule "Badezimmer Ventilator last update" when T…

See if this helps - no rule required! [image] Design Pattern: Time of Last Update Tutorials & Examples Please see Design Pattern: What is a Design Pattern and How Do I Use Them for a description of what Design Patterns are and how to use them. Problem Statem…

[image] AndreasK: I tried to do this by using the “Thing received update” but it somehow does not trigger. That’s because there is no such trigger. Things and Channels don’t receive updates, Items do. There is a specially type of Thing Channel that does generate events, but those can’t be lin…

but I would need to link the “BadezimmerFan_LastSeen” item to all 4 channels of the mqtt Thing so that each channel can trigger the timestamp update or am I wrong?

Yes, and you can do that - an Item can be linked to multiple Channels. EDIT: See @rossko57 warning below - this won’t work for you at the moment.

You may link an Item to multiple channels. In theory, you may link a DateTime type Item to multiple channels using timestamp profile on each channel, in order to update the one Item as and when any of the channels update. (The same channels can also be linked to other Items in the ordinary way, of…

Did the aggregation functions for DateTime Group Items ever get fixed? That could be another way perhaps. Create one DateTime Item per Channel with the timestamp profile and then put them all in a Group:DateTime:MAX.

[image] rlkoshak: You either need to write the rule to trigger when one of the Items updated. Or, use the timestamp Profile. [image] rossko57: So I think your best option is a rule triggered from any of your Items receiving update, which directly updates your timestamp Item. Thx I prob…

Update DateTime as Thing receives data

Setup, Configuration and Use Scripts & Rules

hafniumzinc (T) February 18, 2021, 9:24pm 2

See if this helps - no rule required!