Shelly-homekit: Expose the power consumption to Homekit

[cschildhorn]

In the release notes I found:

• Shelly 1PM, Plug and PlugS power measurement support (#27)

I was expecting that the plugs now show power like e.g. the Eve Plugs in the Eve app etc.

How is this supposed to be in 2.7.0 currently? And is it planed to expose it according to Eve Plugs?

This is how a Eve Plug shows power:

This is an updated Shelly Plug S with 2.7.0:

[pivale]

Hey,

For now you only have status, current consumption, total consumption.
The storage on the devices is very limited, so there might be some trouble in storing it...

But an alternative (like storing in a remote location/device) would be great, but we have nothing like that at the moment.

[cschildhorn]

Hmm the Eve plugs do only cache the data for a certain time as well. The data into homekit via a history service as far as I know.

Homebridge community uses this heavily https://github.com/simont77/fakegato-history but perhaps there is a better way.

[BlancoDeMallloca]

This would be a great feature. May the export to HomeKit/Eve could be implemented in the future. Also Shelly 2.5 has a power measurement function

[rojer]

i wonder what service/characteristic they use to expose power measurements. is there a spec or some documentation? HAP standard has nothing for this.

we already support reading power consumption on shelly 2.5, it's only matter of finding a way to expose this to homekit.

[cschildhorn]

I think there is nothing official by Eve but some people are doing a lot of work rev it.

https://gist.github.com/gomfunkel/b1a046d729757120907c

I think this guy used the work above to create a Homebridge part that is used by many other plugins to write data to the eve characteristics

https://github.com/simont77/fakegato-history

here some example that use this to expose power consumption as far as I know:

https://github.com/SeydX/homebridge-fritz-platform

https://github.com/ebaauw/homebridge-hue

The editor of homebridge-Shelly plugin does not support it but seams to look into it at some point as well.

https://github.com/alexryd/homebridge-shelly/issues/48

[cschildhorn]

This is perhaps the most complete overview link I found currently

https://github.com/simont77/fakegato-history/wiki/Elgato-Eve-History-Protocol

[pivale]

It seems this is not supported by HomeKit but rather by the Eve app.
If I had a choice, I would rather have the devices write to some shared drive on my network a CSV file than using a proprietary app/protocol/framework from a 3rd party.

But I also think this is a cool feature to have in the future :)