My smart sleep mask broadcasts users' brainwaves to an open MQTT broker
12 Feb, 2026
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 ...
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