This was a really quick project. Implementing the FindMy advertisement was basically the same as what was done for the Lenze st17h66, and is implemented in https://github.com/biemster/tlsr825x_FindMy

This repo also contains a small python script that will exchange the dummy key in the firmware with one you control yourself, as generated with the generate_keys.py script in biemster/FindMy.

Precompiled firmware can be found in both the biemster/FindMy and biemster/tlsr825x_FindMy repositories, so no compilation required to get started with this!

This concludes the updates here, but there are a couple minor enhancements that can be done which will be tracked in the github repository. For example advertising the battery status can be added, and maybe also key rotation and advertising to the Google FindMy network are three things I might pick up soon.