TLSR8266 BLE Mesh Firmware in Rust

A 100% Rust BLE mesh firmware for TLSR8266-based smart lights (such as the TYBT1), with Python utilities for flashing, OTA updates, and mesh management. The firmware runs without any Telink proprietary library dependency, using a custom LLVM backend to generate TC32-compatible code from Rust source.

For the unmodified mesh SDK, see the project releases or the early commits of this repository.

Hardware

This project targets the following hardware:

• TLSR8266-based devices — e.g. TYBT1 smart light bulbs
• E104-BT05-TB — a TLSR8266 development board used for UART-based mesh management (product page)
• Raspberry Pi Pico or Pico W — used as a SWire programmer for initial flashing (physical access required)

Includes

• TC32 toolchain
• 100% Rust BLE mesh firmware with Makefile (no libble or vendor library dependency)
• Raspberry Pi Pico/W SWire interface for direct flash programming
• Original TYBT1 firmware backup
• BLE OTA updater (compatible with OEM firmware and this firmware)
• UART OTA updater (requires this firmware on the E104-BT05-TB)
• Mesh adoption and management utilities

References

Heavily inspired by Raphael Baron's reverse-engineering work on the M6 fitness band (GitHub), and trust1995's improved TC32 processor specification for Ghidra.

Documentation

See the full documentation here.