Invalid OF data length: 21 instead of 0

[thisiscam]

A minor issue around

FindMy.py/findmy/scanner/scanner.py

Line 178 in 5cd53fb

"Invalid OF data length: %s instead of %s",

When I use the scanner, I keep getting this error in my log.
What might be happening? Could it be some non-apple device triggering this?

[Skowt]

I'm getting 21 instead of 2 🤔 Seems like the payload might've changed?

[thisiscam]

To clarify, the scanner still works (it detects my device), but just pops this error message from time to time

[Skowt]

Yeah scanning works although when I put my airpods and watch into lost mode, it didn't detect them as separated devices.

[malmeloo]

This is a bit of a strange one, basically the library thinks that the payload type is different than it actually is. Should be quite harmless, but a bug regardless; I'll look into it.

[Skowt]

This is a bit of a strange one, basically the library thinks that the payload type is different than it actually is. Should be quite harmless, but a bug regardless; I'll look into it.

If there's a way to help you debug, feel free to shout and I'll help where I can.

[malmeloo]

I've been looking into this today but cannot reproduce the issue. Could one of you bump the log level in the device_scanner.py example to DEBUG and upload the logs it generates? It will likely generate a lot of data, so you may want to pipe it to a file using python3 device_scanner.py &> logs.txt (or whatever the windows equivalent is)

Do note that it contains the mac addresses of any bluetooth devices in your vicinity, which can technically be used to obtain a rough estimate of your location (see e.g. WiGLE). If you know what to look for feel free to remove any lines containing non-Apple mac addresses (ctrl+f for {76: to find which addresses belong to airtags), or email me at git {at} mikealmel.ooo if you prefer to share it privately.

[thisiscam]

I haven't been able to reproduce this for some reason. Maybe it was some nearby device that's causing this but it's now gone...

[malmeloo]

Hmm, well let me know if you run into it again. I'll keep trying every once in a while