Guide: How to connect to a linux desktop via ble

Configuration question
1

How to connect using bluetoothctl (if gui fails):

Start bluetoothctl:

bluetoothctl

Then:

power on
agent on
default-agent
scan on
# wait for UHK to appear, say CA:06:14:C4:D3:8F, copy the address, then:
pair CA:06:14:C4:D3:8F

If first pairing attempt goes well, but subsequent fail:

E.g., if bluetoothctl complains about:

[bluetoothctl]> pair CA:06:14:C4:D3:8F
Attempting to pair with CA:06:14:C4:D3:8F
Failed to pair: org.bluez.Error.AlreadyExists

Try to remove the connection from caches:

  • In bluetoothctl:
remove CA:06:14:C4:D3:8F
  • if it fails, force remove from system caches (maybe not needed, AI advice):
sudo systemctl stop bluetooth
sudo rm -rf /var/lib/bluetooth/*/CA:06:14:C4:D3:8F
sudo rm -rf /var/lib/bluetooth/*/*/CA:06:14:C4:D3:8F
sudo systemctl start bluetooth
  • full reset of the bluetooth stack:
sudo rfkill block bluetooth
sudo rfkill unblock bluetooth

This topic is mainly for my own future reference, but this seemed the best place for it :smiley:.

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