Just received my new Mi Band 3.
I’ve installed Gadgetbridge from /e/ App Store. There are two App with the same name: the first simply call Gadgetbridge (by “unknown”), the second Gadgetbridge - Unoffical (by “Taavi E.”)
As you can read on the project page, you have to download the one from “unknown” that is the official release.
The App installed without problems, then ask for permissions: you have to give all the permission to get the app functioning properly.
Also remember to activate Bluetooth and Geolocalization services before pair your Mi Band 3.
The page starts displaing an empty screen and you’ve to press the “+” button to discover your Band. After a while, your device will appear. Tap on the name and wait till it starts to vibrate. Then tap on the screen of your device and the pairing is done.
From now, you’re ready to use as you like.
I’ve had no problems: all goes on very simply and the app seems to be easy to be used.
NOTE: updating my device to new /e/ version, I see that data are not visible at user level: needs root account or, if you prefere (and I DO!) can export Gadgetbridge’s db to Android/data/nodomain.freeyourgadget.gadgetbridge/files.
So when you need to do a clean install (I always prefere this way each time there’s a version number change) you can export the data, copy to your PC and then Import when you need.
A good practice is to remove the directory after you’ve seen the Import is OK.
Also is possible to work on your data on your PC for personalized statistics.
Here is a link to the wiki page describing the process you may follow.