Interesting article. Archive: https://archive.today/IZzr4 From the post: >>I recently got a smart sleep mask from Kickstarter. I was not expecting to end up with the ability to read strangers' brainwaves and send them electric impulses in their sleep. But here we are. The mask was from a small Chinese research company, very cool hardware -- EEG brain monitoring, electrical muscle stimulation around the eyes, vibration, heating, audio. The app was still rough around the edges though and the mask kept disconnecting, so I asked Claude to try reverse-engineer the Bluetooth protocol and build me a simple web control panel instead.