WTH: All last_changed attributes for sensors reset on each restart

[mynameisdaniel (Daniel)]

I know this has been discussed in many places before, and there are various technical difficulties, etc. But every single time I restart Home Assistant, this is a WTH moment.

As an example, if I have a bunch of ping sensors doing their thing, if I restart Home Assistant their last_changed timestamps all reset to the last restart time of Home Assistant. This loses a lot of value in not being able to clearly see if a device has been online/stable for periods longer than 2 weeks (or however long it is between udpates).

[mynameisdaniel (Daniel)]

Ahh just found this is a duplicate of:

What the heck is with the 'latest state change' not being kept after restart?

@balloob - the input_booleans were just example. In my opinion there should be an option (if can’t be done for every HA instance), that before automations and all sensors are loaded, last-changed date is restored. So, in example: I turn on and off the light at 2020-08-18 18:30. The date is stored in ‘last_change’ attribute or in database (I’m not tech, just an example). I do restart on 2020-08-18 19:00 and after that and before every other state is restored/automations ran, I’d like HA to ta…

[mrand (Marc Randolph)]

@mynameisdaniel

Ahh just found this is a duplicate

Now that you’ve linked to it, you can mark this one resolved. Or just delete this one.