Airthings BLE pressure differs significantly from other pressure sensors, including itself

[jakllsch]

The problem

The airthings_ble integration displays a significantly different pressure reading than the airthings cloud integration does for data coming from the same Airthings Wave Plus device. The airthings integration reading matches what the Airthings Android app shows, as well as what the Home Assistant Companion reading from my Android phone (generally in the same general vicinity) shows.

It's also annoying that both hPa and mbar are being used as units when they are identical, yet are being graphed separately. Is mbar supposed to be Mean Sea Level Pressure and hPa supposed to be locally-apparent pressure? If so, the airthings integration should be switched to hPa or should convert to MSLP; if not, everything should be in hPa and airthings_ble shouldn't try to convert to MSLP in mbar.

My altitude is about 1000ft/300m, which seems to match the difference shown in these graphs.

What version of Home Assistant Core has the issue?

core-2024.2.2

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

airthings_ble

Link to integration documentation on our website

No response

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

[home-assistant]

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

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[LaStrada]

Hi, thanks for reporting this. This will be fixed here:

Airthings/airthings-ble#32