Bluetooth configure examples for Ubuntu Desktop and Server variants

Bluetooth settings are in the upper-right corner, click it and select Device.

Click Search to scan for Bluetooth devices nearby.

Select the device that you want to pair with.

Bluetooth configuration via console bluetooth utils.

Enable Bluetooth:

sudo rfkill unblock bluetooth
sudo hciconfig hci0 up

Launch bluetoothctl:

$ sudo bluetoothctl
[NEW] Controller 43:54:A2:00:1F:AC Khadas [default]
Agent registered
[bluetooth]#

Setup:

[bluetooth]# agent on
[bluetooth]# default-agent
[bluetooth]# power on
[bluetooth]# discoverable on
[bluetooth]# pairable on
[bluetooth]# scan on

Scan for Bluetooth devices:

[bluetooth]# scan on
Discovery started
[CHG] Controller 43:54:A2:00:1F:AC Discovering: yes
[NEW] Device 46:04:25:5F:1E:8D 46-04-25-5F-1E-8D
[NEW] Device 8C:EB:C6:E7:2E:33 Khadas

Show connected Bluetooth devices:

[bluetooth]# devices
Device 46:04:25:5F:1E:8D 46-04-25-5F-1E-8D
Device 8C:EB:C6:E7:2E:33 Khadas
Device 9C:FB:D5:0D:91:47 9C-FB-D5-0D-91-47
[NEW] Device AC:83:F3:DD:D4:E1 AC-83-F3-DD-D4-E1
[CHG] Device AC:83:F3:DD:D4:E1 Name: LibreELEC
[CHG] Device AC:83:F3:DD:D4:E1 Alias: LibreELEC

Pair with a device:

[bluetooth]# connect <device_addr>

Exit bluetoothctl:

[bluetooth]# quit
Agent unregistered
[DEL] Controller 43:54:A2:00:1F:AC Khadas [default]
khadas@Khadas:~$

Please goto System Settings.