atc1441 / ATC_RF03_Ring

Findings and custom firmware for the Colmi R02 (and similar) Smart Ring with RF03 BlueX SoC

Overview

Overview of infos for the BlueX BLE ARM Cortex-M0 SoC used in the Colmi Smart Ring series

This repo is made together with this explanation video:(click on it)

And

OTA Firmware Flashing Tool

You can use this tool to update the firmware OTA via a comaptible Browser: https://atc1441.github.io/ATC_RF03_Writer.html

OTA Firmware header description

Hardware infos

SoC: BlueX Micro RF03 - 200KB RAM 512KB Flash

HRS Sensor: VCare VC30F

ACCL Sensor: STK8321

Battery: 17mAh

P00 SWCK

P01 SWD