NanoPI Neo Air - is the bluetooth stack well implemeted?

I am going to buy this unit, because I am looking for a cheap board with Bluetooth and camera input included. NanoPi Neo Air seems to be the best choice (and the only - talking about cheap board).
Anyway, did someone play with its Bluetooth interface programming? I mean sending (mainly, but also receiving files) from NanoPi by Bluetooth. Are there any working tools (C, python)?

Thanks for any post in advance!

Bluetooth does not seem to work on Neo Air, same as for M1: NanoPi M1+ Bluetooth not working