How to reprogram the bracelet (Mi band 5)?

Question

Programming

I have a Mi band 5 watch and I would like to reprogram it for myself. Tell me, through which language / program can this be done and will I break the clock?

Answer 1

Take the program Mi Fit or Xiaomi Wear.
Decompile, study the sources, see where the firmware comes from and how it is uploaded.
Download the firmware, disassemble (Huangshan processor on RISC-V architecture), study the code in assembler.
Write your own, compile, fill in the bracelet.
With a non-zero probability, you will have to write your own disassembler, assembler / compiler and firmware upload program.

Answer 2

look here https://dev.mi.com/ , as an option to search on github and similar resources https://github.com/topics/mi-band