VOC units of measurement do not match

home-assistant / core

:house_with_garden: Open source home automation that puts local control and privacy first.

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The problem

I tried to combine the state of two Awair VOC Sensor entities, but Homeassistant reports that the units of measure do not match.

The following "repair" appears in my Settings menu.

Unit of measurements are not correct

Unit of measurements ppb, ppb of input sensors sensor.chester_vocs, sensor.grey_vocs are not compatible and can't be converted with the device class volatile_organic_compounds_parts of sensor group sensor.inside_vocs.

Please correct the unit of measurements on the source entities and reload the group sensor to fix this issue.

Warning - 6/24/2024

This warning is puzzling to me because it looks like the units of measure for both entities is "ppb" (parts per billion).

What version of Home Assistant Core has the issue?

core-2024.6.4

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

Awair

Link to integration documentation on our website

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

Diagnostics information

No response

Example YAML snippet

No response

Anything in the logs that might be useful for us?

I have enabled debug logging, but haven't seen anything interesting yet.

Additional information

The two devices that I am trying to combine are an Awair 2nd Edition and an Awair Element.

Hey there @ahayworth, @danielsjf, mind taking a look at this issue as it has been labeled with an integration (awair) you are listed as a code owner for? Thanks!

Code owner commands

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home-assistant / core