ch592 FindMy firmware

Based on rgoulter/ch592-ble-hid-keyboard-example and Suniasuta makefile template

Installation

The firmware can be compiled with the xpack riscv compiler: https://github.com/xpack-dev-tools/riscv-none-elf-gcc-xpack

The .bin can be flashed to the CH592 using chprog. (Enter the CH592 bootloader by holding down BOOT when connecting it using USB).\ The SDK for CH592 from the openwch EVT is vendored under sdk/. (Encoding has been changed from gbk to utf-8).

make to compile \ make clean to clean/remove the compiled stuff \ make flash to flash \

Further preparation

I assume here you are already familiar with the FindMy scripts from biemster/FindMy. If you're not, please refer to that repository for further info.

1. Generate a .keys file with FindMy/generate_keys.py
2. Add the key to the firmware using the prep_fw.py script like this (adv-interval is optional, the broadcasting interval in seconds [allowed values are 2,3,5,10,20,30]):

   ./prep_fw.py --keyfile=<path to .keys file> --adv-interval=5

3. Flash the new FindMy_XXXXXXX.bin file using chprog FindMy_XXXXXXX

Retrieving the location of the module

This is explained in more detail in the FindMy repository, but boils down to running the request_reports.py script in the same directory as the .keys file generated here.