Problem connecting to BT from Linux/raspberry pi

[ivicajan]

Hi all,
All is working fine until I connect via BT and on my linux laptop or raspberry pi. Tested with Android phone and Windows PC and it was fine. Seems like Linux based connections have problem:
Managed to pair and connect but after 1s it just disconnect. Seems like common problem on linux using bluez
sudo bluetoothctl
Agent registered
[bluetooth]# connect 08:3A:F2:66:DB:F2
Attempting to connect to 08:3A:F2:66:DB:F2
[CHG] Device 08:3A:F2:66:DB:F2 Connected: yes
[CHG] Device 08:3A:F2:66:DB:F2 ServicesResolved: yes
Failed to connect: org.bluez.Error.NotAvailable br-connection-profile-unavailable
[CHG] Device 08:3A:F2:66:DB:F2 ServicesResolved: no
[CHG] Device 08:3A:F2:66:DB:F2 Connected: no

Wondering if you have any idea how to make the connection via BT working on linux?
Another option would be serial 2 wifi in a similar way as you coded serial via BT.
There is a nice library: https://github.com/Invzblio/SerialToWifi/blob/main/src/SerialToWifi.h

Thanks in advance!

Cheers,
Ivica