I'm looking for a cheap (~40$) smart ring (programming.dev)

submitted 6 days ago* (last edited 6 days ago) by binaryqueen@programming.dev to c/programming@programming.dev

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Good morning 👾

I'd like to fetch data via BLE (Python or Swift) from a cheap smart ring that can be reverse engineered or that is already RE'd. Pulse, oxygen levels, gyroscope, button would be very useful. I'd like to build a python or swift library.

Thank you for any input =)

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[-] Kissaki@programming.dev 6 points 6 days ago* (last edited 6 days ago)

Maybe a Colmi smart ring, versions ranging from 13 to 30 €?

I got a Colmi Smartwatch for 13 €. It doesn't integrate into the standard Android Health thing but seemingly uses its own protocol or sth.

[-] binaryqueen@programming.dev 4 points 6 days ago* (last edited 6 days ago)

I was looking into Colmi already but thought maybe knew some hidden gem :)

Checking the Colmi watches

[-] inari@piefed.zip 4 points 5 days ago

The nice thing about Colmi is there's support for it in Gadgetbridge, so it will likely be easier to tinker with

this post was submitted on 18 May 2026

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