Counterpart of "{attribute} of {device} was not updated for 0 minutes"

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A rule that triggers once a device was not updated within a given interval is quite easy.

When value of device not updated for 30 minutes then log "device is lost"

But what to do if you would detect that the device comes back after this failure?

Well, my solution is a second rule with zero time like in the title of the thread

When value of device not updated for 0 minutes then log minutes then log "device is back"

if $device.attribute changes then bla

@SaxnPaule But it should only report on first change. I think this is not possible without an additionally state variable. I am looking for a smarter solution and if not exists I would vote for a new rule predicate.

My current working solution is

When value of device not updated for 30 minutes then log "device is lost" and $state = 0
When $device.value changes and $state == 0 then log "device is back again" and $state = 1