Affiliate Link to the Ring:
https://s.click.aliexpress.com/e/_op8fMC1
This repo is made together with this explanation video:(click on it)
Use this Android tool to upload the firmware to the Smart BLE Ring:
https://play.google.com/store/apps/details?id=com.dialog.suota&hl=en
Settings as in the OTA_Settings_for_apk.jpg image
The firmware can be compiled with the "SmartSnippets Studio V2.0.20"
The Firmware folder is here: "Firmware_src\projects\target_apps\ble_examples\prox_reporter\Eclipse"
After compiling a custom tool is used to create an OTA Enabled firmware file called "output.bin"