WAQI air quality index not shown as number on history

[PutoPunko]

The problem

WAQI air quality index not shown as number on history due to lack of unit of measurement

Waqi station: l'Hospitalet de Llobregat, Catalunya

If I create a new sensor template with this configuration it works as expected:

• name: air_quality_index_float
  state: "{{states('sensor.air_quality_index') | float(default=0)}}" unit_of_measurement: " " device_class: aqi

What version of Home Assistant Core has the issue?

2022.07.0

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

Waqi

Link to integration documentation on our website

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

Diagnostics information

No response

Example YAML snippet

No response

Anything in the logs that might be useful for us?

No response

Additional information

No response

[probot-home-assistant[bot]]

waqi documentation waqi source _{^{(message by IssueLinks)}}

[probot-home-assistant[bot]]

Hey there @andrey-git, mind taking a look at this issue as it has been labeled with an integration (waqi) you are listed as a code owner for? Thanks! _{^{(message by CodeOwnersMention)}}