Colmi R02

The Colmi R02 is what happens when a cheap commodity ring meets a determined community: the BLE protocol has been reverse-engineered and documented end to end, with open Python and Go clients that read heart rate, SpO₂, accelerometer, and sleep data straight off the ring. The hardware itself is closed — we label it that way — but at this price it is the best sensor-per-dollar deal in wearables, and the only ring you can script this afternoon.

Community SDK — protocol reverse-engineered & documented

Volume pricing starts at 100 units. Custom firmware starts at 1,000. Your logo starts at 5,000.

In stock