No default controller available With bluetoothctl (1 mins read).
One possible solution for the No default controller available error message with bluetoothctl.
Tag bluetoothctl
Toggling Your Bluetooth Connection using bluetoothctl on the Command-Line (1 mins read).
How to script bluetoothctl to toggle your connection to a Bluetooth device.
by 
Jamie Tanna
.
#blogumentation
#command-line
#bluetoothctl.