BLE scanning improvements

[AGaylord6]

Could be helpful to extract a little more data from nearby Find My devices:

• RSSI
• Apple device type (airpod, iphone, find my device, mac) and battery level from status byte

After scanning, it could present an overview of all Find My devices found nearby.

Would it be suitable to implement some kind of stalker detection as well? If the scanner was run at different times, it could tell the user which devices appeared nearby both times (while excluding the user's own devices). This would only be relevant if it was run twice within 24 hours (before all the keys rotate). It would do better than Apple's detection system though, which can be circumvented by setting a bogus status byte.

Also going to confirm bleak works with Windows.

[malmeloo]

I don't think the device type can be identified from BLE advertisements alone. RSSI and battery level sound like good additions though!

[AGaylord6]

Awesome, I can work on extracting those! I don't know if this is still true, but some papers suggested that 2 bits of the status byte indicate device type.

• https://petsymposium.org/popets/2023/popets-2023-0102.pdf (page 140)
• https://arxiv.org/pdf/2202.11813 (page 5)

[malmeloo]

Oh really? That's interesting. I don't remember that being in the spec, but if you can identify device types from the status byte that would be super cool!

[AGaylord6]

Hey I started working on stuff, do I need to be added somehow before I can push to my branch's remote?

[malmeloo]

I think it's easiest if you push to a fork and then open a pull request, that way no permission changes are needed

[AGaylord6]

Oh duh, thank you! Please let me know what you think of the changes and any other scanner improvements I could add