Detect offline zwave thing (the moment it actually gets offline)

[disideris (Dimitris)]

Hi there,

My issue:
I want to know when a zwave device(thing) goes offline the moment it goes offline.
An example of mine is that i have a smart switch that is wall plugged and I see in paperui that this smartswitch is online. When I unplug the smartswitcfh, openhab shows the smartswitch offline after 10 mins(best scenario).

My workaround:
i have tried some workarounds experimenting with openzwave python api and i found out that if i send a NIF (send_information() method from openzwave python api) i can detect that the smartswitch is offline the time it actually gets offline.

Question:
Is there any best practice to query a thing from openhab to see if it is offline the moment it gets offline?

Thanks a lot in advance!
Is there a best practice to know

[sihui]

Using Hue ONLINE / OFFLINE Events in rules

Recent updates (Spring 2017) have allowed using Thing Status Info changes in rules. I was able to use these new features to fix a lighting problem in my Frankenhouse (the light switch only controlled 1 electrical outlet, the others are always on). Using hue lights with the below rules, I now have lights responding to the physical switch (where they weren’t responding before). Note: that there can be a delay of about a minute between flipping the switch, and having all the lights turn on / off…

[rossko57]

@disideris

Is there any best practice to query a thing from openhab to see if it is offline the moment it gets offline?

In general, there are ways. In zwave, most of them wouldn’t make sense because many zwave devices sleep for long periods to conserve battery. The zwave philosophy of device-driven events isn’t well suited for this.

OpenHAB does allow you to send REFRESH commands to Items. Some bindings support that, I don’t know about zwave.
Some bindings will update an Item’s state to UNDEF on a read failure, which you can detect with a rule. I don’t know if zwave does that - probably not, due to devices sleeping.

[chris (Chris Jackson)]

@rossko57

Some bindings will update an Item’s state to UNDEF on a read failure

I think the original request is about how to detect if the thing is offline? I think the link @sihui provided is the correct way to do this - you can simply get the thing state in a rule.

[kugelsicha (@HerzScheisse ~ Holger)]

you can also use the Logreader Binding LogReader binding and define your own custom search strings… and add this to rules, notification managers like telegram, like i do