uhhhhhhhhh
so... i have a home assistant install with me for my demo.

it lives on a raspi. which has bluetooth onboard.

someone at con brought a bluetooth toothbrush. and home assistant found it. and i added it.

soo... now im tracking a bluetooth toothbrush at a security con.

sooooo
these toothbrushes publish rssi.

.. and im graphing it now

it.. publishes via btle that the user went into the settings menu?
Oral-B iO Series 9 Rechargeable Electric Toothbrush, Black Onyx

The Oral-B's iO Series 9 utilizes powerful, but gentle micro-vibrating bristles. Experience the WOW of a professional clean feel at home.

Oral-B

@Viss Silly story time...
A _long_ time ago at a devcon I mentioned how stupid some IoT was and said that it would be fun to hack on but that they were too expensive for a joke...

Unfortunately the guy sitting next to me organised a whip round and $100 later I was kinda committed to hacking on a toothbrush.

In the end I tied it to voicemail so that it said "Mr Panton is brushing his teeth right now, but will be available to take your call in 97 seconds". There may be a video somewhere.

@Viss If I remember right, @jcolp was the instigator of the whip-round .
@steely_glint @Viss Kicker is, it was funded before it even got to me. :P