Christian Kudera gave a talk “All your Fitness Data belongs to you: Reverse Engineering the Huawei Health Android App” on Easterhegg 2019. -> more Information
The talk described the reversing process of the Huawei Health App. In this context, the proprietary BLE Huawei Link Protocol v2 was disclosed, which allows the use of the Huawei fitness devices without the Health App and its accompanying ecosystem.
Slides: Download here