This project outlines a systematic approach to hack, reverse engineer, and eventually develop custom Zephyr RTOS based firmware for the Xiaomi Mi Band. It aims to understand the device's hardware components, and system overview to create an open-source alternative firmware.
Full documentation is published at https://walidbadar.github.io/ZSband/.
- Xiaomi Mi Band 4: hardware details, debug pads, and build, flash and debug instructions
- Map debug ports (SWD, UART) and test points
- Document PCB layout and component connections
- Extract firmware through debug interfaces if accessible
- Create device tree source for Xiaomi Mi Band
- Implement drivers for display and sensors
- Developing for personal use and research purposes only
- Avoiding distribution of copyrighted firmware components
- Focusing on interoperability and open standards
- Documenting for educational purposes