Sensor `0x40` Is showing as metres and not millimetres in Home Assistant

[deeja]

Describe the bug
The documentation says that 0x40 is mm but the Home Assistant display has it m.

To Reproduce
Advertisement 02 01 06 04 09 61 61 61 07 16 d2 fc 40 40 1b 10 where 40 1b 10 is the data

[Ernst79]

0x101b is 4123 mm. Which is equal to 4.123 m. So, the value is correct, it is only converted from mm to m.

I checked the code of this repo, sensor-state-data repo and home assistant core repo, but as far as I can see, the default unit of measurement should be mm

bthome-ble

sensor-state-data package

Home assistant core (BTHome integration)

So, my guess is that you manually have overruled the unit of measurement in Home Assistant. Just change it back to mm, and it should display 4123 mm

[deeja]

Thanks for looking into this.
Going off your comment and doing a quick test I can now see the issue.
It looks like they treated as the same sensor.
I'm not sure that it really matters for almost anyone as it's a bit of an edge case.

02 01 06 04 09 61 61 61 0a 16 d2 fc 40 41 64 00 40 0b 00
If two measurements are added, only one is shown.

Removing the millimetres
02 01 06 04 09 61 61 61 07 16 d2 fc 40 41 64 00

Leaves the wrong unit on the board

[Ernst79]

hmm, that is strange. If I have some more time, I'll look into it. It should have created two sensors, with _1 and _2, but if you combine meters and millimeters, things go wrong. I'll check later if I can figure it out