Domoticz

A Zigbee PIR sensor has been working OK for a while, but last week it went "dead".
Both Domoticz and Zigbee4Domoticz did not show anything, except for the warning that nothing has been heard from this sensor for a while.

So I removed the device following the instructions, then added it again.
It now works OK, but I noticed that it came back with a different "short ID".

Does this make sense? What could be the cause of a device going silent?

Using plugin version 6.3.010

in Zigbee the device has a Mac@ (IEEE), and then a short address (NwkId) is assigned when in a network. This NwkId can changed during the time, this is up to the Coordinator to deal with that.

So yes, that is normal that it changes.

OK, thanks.
So what remains now is the question why the device was frozen... no signal at all, although there was definitely movement.
After I removed and re-added it, all was well again.
How can I prevent this from happening in the future?

What brand is the PIR ? If that is a Aqara/Xiaomi PIR this is quiet a known issue with the Aqara devices which do not comply with ZB 3.0 and which have a bug in their firmware.
The only thing you can do is just put the plugin in Permit mode and then reset the PIR, you don't need to remove it.

It is Xiaomi, I think. Rebranded.
Will keep your suggestion in mind.
Meanwhile I'll put a small script together to send a warning when a device is silent for a longer period.

manjh wrote: ↑Monday 03 April 2023 13:52 Meanwhile I'll put a small script together to send a warning when a device is silent for a longer period.

Don't need to script for sensors as they already have a last update time notification function: https://www.domoticz.com/wiki/Managing_ ... ifications

waltervl wrote: ↑Monday 03 April 2023 15:10

manjh wrote: ↑Monday 03 April 2023 13:52 Meanwhile I'll put a small script together to send a warning when a device is silent for a longer period.

Don't need to script for sensors as they already have a last update time notification function: https://www.domoticz.com/wiki/Managing_ ... ifications

Yes, but... when I'm away from home for a few days or longer, it is quite normal that my PIR sensors donot show any activity.
When I set notifications in the devices, I would have to go in and change all of them when I go away for a while.

In a script, I can simply check my "vacation" switch, and act accordingly: when I am on vacation, no notification,
Else send warning if no movement for a day, for example.

Hello,

manjh wrote: ↑Monday 03 April 2023 20:50 In a script, I can simply check my "vacation" switch, and act accordingly: when I am on vacation, no notification,
Else send warning if no movement for a day, for example.

In a dzVents script you can just use the last update time, it is updated each time the sensor sends a message to the coordinator. Aqara motion sensors are sending heartbeats roughly every 1 hour. I have a script checking that my sensors are still alive based on this. I created it base on the script available on another in this forum, search for "Check Sensors script" (with quotes). If a device was not seen in the past 2 hours I get a notification.