[Dunedan]

I'd love to see a full featured open-source firmware for the Mi bands, as the original firmware requires an device-specific Xiaomi-issued key for Bluetooth pairing. For obtaining this key you have to use the Amazfit App with an Xiaomi account at least once. For details check out https://gadgetbridge.org/basics/pairing/huami-xiaomi-server/

While thinking about it, I wonder if that's even compliant with GDPR, as it forces users to provide their email address for no good reason.