pythonbluetoothnvidia-jetson-nanopybluez

Pybluez on Nano: SDP can’t be generated

I had an issue like this on my Nano:

profiles = [ SERIAL_PORT_PROFILE ],
  File "/usr/lib/python2.7/site-packages/bluetooth/bluez.py", line 176, in advertise_service
    raise BluetoothError (str (e))
bluetooth.btcommon.BluetoothError: (2, 'No such file or directory')

I tried adding compatibility mode in the bluetooth.service file, reloading daemon, restarting bluetooth and then adding a serial port by doing

sudo sdptool add SP

These steps work fine on my ubuntu 20.04 laptop, but on jetpack 4.5.1, they don’t. And I checked also, they don’t work on jetson NX either.

I am really curious on how to solve this issue, otherwise, another way to use bluetooth inside a python code is welcomed.

Thanks

Solution

  • The solution was in the path of the bluetooth configuration file (inspired from this https://developer.nvidia.com/embedded/learn/tutorials/connecting-bluetooth-audio)

    this answer : bluetooth.btcommon.BluetoothError: (2, 'No such file or directory')

    is not enough for jetson devices (jetpack). Although I didn't test if it works without changing the file mentioned in this link.

    There is a .conf file that needs to be changed also : /lib/systemd/system/bluetooth.service.d/nv-bluetooth-service.conf

    modify :

    ExecStart=/usr/lib/bluetooth/bluetoothd -d --noplugin=audio,a2dp,avrcp

    to :

    ExecStart=/usr/lib/bluetooth/bluetoothd -C

    after that it is necessary to do:

    sudo systemctl daemon-reload
sudo systemctl restart bluetooth

    Tested on jetson Nano and NX with jetpach 4.5.1

    Thanks for the help !