Xiaomi Mi Smart Scale with Garmin Connect

Thanks for the link...

While searching for answers, I found another great possibility:

https://github.com/RobertWojtowicz/miscale2garmin

Here, one can make the scales fully independent of the smartphone. If you do not have a smart-home server with a Bluetooth adapter installed, a tech-savvy person can make a separate device with components around $10 (ESP32 board and a Li-Ion battery).

I think one can make it built-in in the scales itself and use the scales' battery. But, probably, it needs more technical tweaking.

The only downside - these scales will be only yours. And if your wife/husband/child/dog stands on it, it will send their weight to your Garmin Online account.

This project is for multiple users (detects weight differences):

• Script "export_garmin.py" supports multiple users with individual weights ranges, we can link multiple accounts with Garmin Connect;

Oh, good point. Didn't read that. Seems, need to read more thoroughly.

It's definitely something with android 8.1
I tried it on a friend's mob with android 10 and everything works OK.

Then you should definitely report a bug. 

I'll try this afternoon to install on my spare Blackberry KeyOne it's on factory settings, completely clean.

It's probably not a bug, but 8.1 android is too old...

If like me you have too old android phone and it doesn't work for you "MiScale Exporter", try this: https://github.com/davidkroell/bodycomposition/releases

It works under windows (or linux ) via the command line...

The developer made two changes specific to my old phone…
It was a problem that android 8 does not support HTTPS2 and a problem with bluetooth permission.
Now the my scale exporter works fine for me.
All recommendations!