[METER] add support for Shelly EM3

[kljakobsen]

Add support for the Shelly local integration, as a smart meter.

https://www.home-assistant.io/integrations/shelly

The integration created a device - , that has 3 related devices, 1 for each phase. these devices current (a) can be read in near real time

[dirkgroenen]

Hi @kljakobsen! To help me understand how the Shelly integration exposes such an energy meter, can you share me some screenshots of the device and its exposed states? Ideally also including the Entities page filtered on the EM3 device(s)?

Right now the integration expects a single device to expose 3 phases, but if I understand you correctly the Shelly integration exposes multiple devices all having 1 entity?

[kljakobsen]

Hi Dirkgroenen,
Sure..
Devices:

Device relation:

Entities:

[dirkgroenen]

Thanks! I'm afraid that's not going to be a quick fix right now. I'm away for the next two weeks organising an event, but as soon as I'm back I'll pick this up again and see what I can do.

[jonasman]

hi i got a shelly 3EM, im not sure what is the issue here, but the main device exposes the total combiner power in one sensor too

[VVVVVVVip]

Also using an 3EM and choosed advanced config with a template helper sensor set to 0.

Advanced Configuration
For homes without a compatible energy meter, you can manually configure sensors for each phase, including:

Power consumption (in kW)
Power production (in kW)
Voltage

💡 Tip: If you only have one sensor that shows both consumption and production (e.g. an active power sensor), you can set it as the Consumption Sensor. Then, create a Helper Sensor with a fixed value of 0 to use as the Production Sensor.

But the available power values looks a bit weird?
Could it be some value troubles since my 3EM sensors are in W and not kW?

[dirkgroenen]

For everyone following this thread interested in an EM3 integration: I'm a bit busy these months with work so I don't have enough time to look into this right now. Feel free to open up a PR of course, which I'm happy to review.

But the available power values looks a bit weird?
Could it be some value troubles since my 3EM sensors are in W and not kW?

Correct @VVVVVVVip, sensor values are expected to be in kW. You can always add a Helper Sensor to convert it from W to kW.