Zigbee2mqtt last_seen

[P6Dave (Dave Forrester)]

Does anyone have a definitive guide to how to enable the last_seen attribute of a device in Zigbee2mqtt?

I’ve read numerous posts that say “oh just add this, or just add that”

example:

@rednas

I enabled the following in zigbee2mqtt to show the last seen:

advanced:
  last_seen: ISO_8601_local

After this I added one device and it shows the last seen in HA, however it was initially disabled in HA but I enabled it.
However, for my previously added devices it doesn’t show the last seen. How can I get this to show for all Z2M devices in HA?

or

As far as I can tell, that would set the date and time format to local time for the last_seen attribute , but how does that then enable it and where specifically does this need to be added?

I enabled simple availability in my Zigbee2mqtt and now have all my devices showing their availability:

I look at the first device and the last_seen attribute shows N/A

Then I discover this under Settings > Raw

How do I change that "last_seen": "disable", to "last_seen": "enable",

I can’t see that in the zigbee2mqtt configuration.yaml file

Thanks.

[francisp (Francis)]

Try restarting Zigbee2MQTT. If it is still not enabled for all your devices, I’m afraid you will need to re-pair them.