defrost history problem

[SzymaneKwr]

the sensor.nibe_91210_44703 entity does not show any data in history.

[NickSutton]

It would be very helpful if this entity could report something useful. Is it just a case of setting the unit_of_measurement value to a string?

[elupus]

the sensor_class also need to be set to measurement. I wonder why it has no unit.

[NickSutton]

Spot on, in fact just adding sensor_class: measurement in the dev tools then plotted the graph properly.

I'm going to have a go at using Customize Entity to temporarily fix the issue:

homeassistant:
  customize:
    # Add an entry for each entity that you want to overwrite.
    sensor.nibe_XXXXXX_44703:
      sensor_class: measurement