[gog]

Take a look at xdrip4ios[1]. If you are using Libre 2 sensors you don't need MiaoMiao, Libre 2 has Bluetooth connectivity built in.

The other piece of the puzzle is Nighscout[2] that stores data in Mongodb (last time I looked at it). You can also enter a custom script to your Nightscout installation that can be your own endpoint to accepting JSON data about BG.

1) https://xdrip4ios.readthedocs.io/ 2) http://www.nightscout.info/

[ollysb]

In many countries the official Libre app now supports bluetooth continuous updates on Libre 2 and 3. That said I do much prefer xdrip4ios.

[gog]

It does, but you can't forward this data to a separate service or push to your calendar so you can see it on your watch.