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
You can use this tool to update the firmware OTA via a comaptible Browser: https://atc1441.github.io/ATC_RF03_Writer.html
SoC: BlueX Micro RF03 - 200KB RAM 512KB Flash
HRS Sensor: VCare VC30F
ACCL Sensor: STK8321
Battery: 17mAh
P00 SWCK
P01 SWD