Report power factor as persentage

[fsaris]

HA expects power factor in %. When in % the history is shown as a graph

Followup of #50

[wimb0]

That is weird. Power factor is something in a range from -1.0 to 1.0. The unit for this is φ (cos-phi), it is not a percentage of something.

[fsaris]

Okay, I see that measurement to for other components. Will dive into this next days/week.

The % value was based on https://www.home-assistant.io/integrations/sensor/#device-class

[fsaris]

Your correct the % was added to get tests green and because HA needs a unit to recognize the value as a numeric value. But value should be as is.

Think will add the (space) as temp workaround to get the graphs in HA.

For reference:

• Initial architecture discussion https://github.com/home-assistant/architecture/issues/397
• Initial change that added power_factor https://github.com/home-assistant/core/pull/36800
• test still mentions the value should be between -1 and 1 https://github.com/home-assistant/core/blob/de0460de6170b360fe6746e5f2963a04e6063547/tests/testing_config/custom_components/test/sensor.py#L41
• Follow up discussion https://github.com/home-assistant/architecture/issues/469

[fsaris]

Some more insides on this https://github.com/home-assistant/architecture/discussions/503

[fsaris]

New approach with temporary workaround for missing HA core functionality see #55