you might get some more answers using the help function in the forum, but there are some posts of different users that have made some experiences with bluetooth in following threads/ answers:
Asus usb B-400 work for me. Didnāt tryed bluetoothctl with ssh, but is it possible to add a device like Yamaha MDBT01 or Korg nano studio BT ? Done with my raspberry but dunno if on the modduo the bluetooth is fully installed ?
We donāt ship with such firmware files. there are far too many to collect and they would make the OS image 2x or 3x bigger, plus there are often very strict license requirements that do not allow us to ship with them anyway.
You can try to follow the same steps as per WiFi to get the firmware inside, see WiFi - MOD Wiki
Firmware loaded, now status is discoverable but Iām unable to connect with my android phone. Iām able to pair the mod (it asks for a pin which should be 0000) but Iām unable to establish a bluetooth connection for some unknown reasons.
Maybe this is related to the android version? Wondering if the feature just got removed completely, it was kinda hidden before anyway.
What version is your device running at? Any chance of trying an old phone or something that runs an older version?
Hello. I have the same problem with my Mod Duo X.
I tried different android phone and tablet.
I think something is broken between android and Mod Duo devices.
Qucik question :-). Have you followed step 5 ( 5. As soon as your MOD device is paired, click on its settings and activate the āInternet accessā through it ) of the bluetooth/android-wiki?