$ bluetoothctl
[NEW] Controller C8:E0:EB:48:0F:6E foo [default]
[bluetooth]# power on
Changing power on succeeded
[bluetooth]# agent on
Agent registered
[bluetooth]# default-agent
Default agent request successful
[bluetooth]# scan on
[bluetooth]# trust C8:E0:EB:04:52:55
[CHG] Device C8:E0:EB:04:52:55 Trusted: yes
Changing C8:E0:EB:04:52:55 trust succeeded
[bluetooth]# pair C8:E0:EB:04:52:55
Attempting to pair with C8:E0:EB:04:52:55
connect
[CHG] Device C8:E0:EB:04:52:55 Connected: yes
[agent] PIN code: *******
bluetooth keyboard
Moderator: frogmaker