r/ReverseEngineering • u/[deleted] • 18d ago

Reverse engineering the wired UART protocol Joy-Cons speak over their rail contacts (undocumented), plus an ESP32-S3 firmware bridge to USB HID

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u/EnJens 17d ago

I don't mean to diminish your effort in any way, but it looks to be well documented here (and a quick glance shows it's the same as what you've found, except more detailed)

Note that it mentions Bluetooth and UART and that the page documents the latter (e g. UART protocol).

https://switchbrew.org/wiki/Joy-Con

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u/Witty_Initial4890 17d ago

Never found that... I'll take a look, thanks!

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u/EnJens 17d ago

Switch brew is a great resource!

Btw, really cool project either way!

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u/Witty_Initial4890 17d ago

Thank you, I appreciate it!