LEDVANCE Matter Plug: Energy always zero

[crepererum]

The problem

The plug was successfully paired via Matter (using https://github.com/home-assistant-libs/python-matter-server as a controller) and can be triggered on/off and shows current, power and voltage. However, the energy level is always 0.

What version of Home Assistant Core has the issue?

core-2024.10.2

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant Container

Integration causing the issue

Matter

Link to integration documentation on our website

No response

Diagnostics information

matter-01JA0NPZZE9R4F4BNA4MVXD2CG-LEDVANCE MATTER PLUG EU WH-4b6bcf02858be73b0ec3ad2e9497d0b8.json

Example YAML snippet

No response

Anything in the logs that might be useful for us?

No response

Additional information

Product page: https://shop.ledvance.com/products/smart-wifi-mat-plug-eu-wh-ledv

A similar issue was previously reported (#125868) but there it was concluded that the smartplug is a bit of a protocol-mess.

[home-assistant]

Hey there @home-assistant/matter, mind taking a look at this issue as it has been labeled with an integration (matter) you are listed as a code owner for? Thanks!

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[marcelveldt]

A similar issue was previously reported (#125868) but there it was concluded that the smartplug is a bit of a protocol-mess.

So, you decided to open the same issue again to hear the same answer ?

[crepererum]

As far as I can tell this is a different device and home assistant doesn't show that it's such a mess then the one in #125868 . So it's not obvious to me that this will less to the same conclusion.

[crepererum]

So I've drilled into matter data by looking at the matter server (didn't know that this one also has a UI). It's the same NeoCluster as in #125868. That's sad. However, the plugs are way cheaper than Eve (around 1/4 of the price) and run over WiFi, so I think they would be nice to support. I'm willing to have a look at the cluster and reverse engineer the mapping. Would you accept a PR to https://github.com/home-assistant-libs/python-matter-server to add new mappings to that cluster?

[marcelveldt]

So I've drilled into matter data by looking at the matter server (didn't know that this one also has a UI). It's the same NeoCluster as in #125868. That's sad. However, the plugs are way cheaper than Eve (around 1/4 of the price) and run over WiFi, so I think they would be nice to support. I'm willing to have a look at the cluster and reverse engineer the mapping. Would you accept a PR to https://github.com/home-assistant-libs/python-matter-server to add new mappings to that cluster?

Sure! Use the Matter Server's own UI to explore the custom cluster values and try to find out which one of them it is but in my experience this cluster is a mess. Do not have too high expectations. Let's just hope they will provide an update of the firmware to matter 1.3 which has a power measurement cluster by default.

[marcelveldt]

Closing here as this is not an issue in the Mater integration but with this particular device.

[crepererum]

I've checked the device and I think it's safe to say that it is a mess. The field stays zero until you also connect it with their app (which probably sends some special matter command or something). Home assistant easily allows you to share an already registered matter device with another controller/app. Then the field starts to do something, but the field describes the consumption of the "last day" (I've double checked what their app says), whatever that is (is it the last 24h or the amount since midnight in whatever time zone). There is however no total counter, which makes the integration very flaky. I also had the impression that the device-side sum is somewhat weird and doesn't match the "watt" value super well. Ah, and the watt meter doesn't account for consumption <5W.

This is better solved by Matter 1.3 since it specifies total counters or that you have to specify the aggregation window (e.g. the exact begin and end timestamp of whatever you are aggregating). Tasmota also does this better by offering "total", "today", and "yesterday" with a clear time and time zone semantic.

So I've decided to send this device back and use a tasmota device.