I have a pair of chinese rave glasses that can display scrolling text, bitmaps, or animations. They also make you look way too cool for school.
They speak Bluetooth to a shady APK, I've put it on a disconnected phone and I'm reverse engineering the protocol. https://queer.af/media/kPpwoBGP0l_uV41DNcs
By the way, this is from Cyberdog, if anybody wants a pair: https://www.cyberdog.net/products/rave-glasses
I also have one of these collars, which is next once I finish this: https://www.cyberdog.net/collections/accessories-light-up/products/future-collar?tag=
Here's the catch: the GATT collection only includes a single descriptor (0004), and it's not writable.
Wireshark shows that the app, when you toggle them off and on, sends a GATT Command write (0x52) to handle 0x0003, with value: 01 00 02 06 09 02 05 03.
I'm not sure how to coerce BlueZ to let me do this.
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