smartplugv2_energyv3 - unable to get decent Energy readying

[doron1]

Hi folks,
New to Tuya Local (not to HA and related stuff) and would appreciate some guidance.

I have a smart plug that seems to present itself as smartplugv2_energyv3. Protocol version 3.4.
I added it to TL and it works fine: Switch control works, and power reading (voltage / amperage) seem to be good.
The one thing that seems to be off is the Energy entity. It seems to be stuck at 100wh (not correct by any stretch), and at some point it falls down to 1wh and goes back to 100.

On the HA Energy panel, I get two interesting indications:

Unexpected device class
The following entities do not have the expected device class:
sensor.energy_monitoring_smartplug_tuya1_energy
Last reset missing
The following entities have state class 'measurement' but 'last_reset' is missing:
sensor.energy_monitoring_smartplug_tuya1_energy

Looking at the entity registry I do see that the device_class is set to null.

Why would this be set up this way, and more importantly, how can I fix this so I can get decent energy reading? Thanks for any insight.

[make-all]

The reason this entity is deliberately not set up properly for use in the energy dashboard, and also disabled by default, is that it does not give useful data.

Instead, you need to use a Reimann Sum integration helper to derive an energy usage estimate from the power sensor data.

[doron1]

Thank you so much. I (obviously) was not aware of that. Just set up the integration sensor and it (obviously...) seems to be doing the right thing. Appreciate the guidance! And this great integration, in general.