When I saw the title I was prepared for a great hack. Something that truly belonged on Hacker News. But this seems a lot more lame.<p>"I made lighting controlled by a ESP32, then put it inside the brush and connected the button to it."<p>But reading the twitter replies further down the chain, it seems the toothbrush sends data to the charging base, and the ESP resides there and analyzes the signals sent to the base? Much more interesting. Twitter's character limit really killed this post.<p>Unrelated, all the hashtags and @s make Twitter quite hard to read. The @ and # characters should be hidden for readers.
Coincidentally, I bought an ESP32 (ESP-WROOM-32 Rev1)[0] last month, and have a bluetooth toothbrush and a couple of Amazon Smart Plugs. I guess you could make your own brushing compliance system with an alarm, and add a camera plus CV to detect an absence of motion to prevent basic cheating.<p>0. <a href="https://www.ebay.com/itm/262809348271" rel="nofollow">https://www.ebay.com/itm/262809348271</a> It's probably not the best or cheapest available.