Bluetooth - Multiple Controllers

When local device / computer supporting multiple Bluetooth controller, must ensure we select the correct one before connecting.

List of connected Bluetooth controllers

Reference: Using Multiple Bluetooth Controller

bluetoothctl list

Select a default controller

Select a Bluetooth controller by MAC address

For convenient, using controller name convert to MAC address:

read "Choose a name of default controller" dev_name
bluetoothctl select $(bluetoothctl list | grep "$dev_name" | awk '{ print $2 }')