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bluetoothctl — is the default frontend to pair / connect / trust BT-Devices
type to see options to use:
bluetoothctl help
https://wiki.archlinux.org/index.php/Bluetooth#Console
sudo pacman -S bluez bluez-utils
sudo systemctl start bluetooth
// start the service till next reboot
sudo systemctl enable bluetooth
// enable bluetooth to start automatic on every boot
If you want a GUI to handle BT:
install one of these:
blueberry
blueman
both will integrate into XFCE4 setting GUI also.
It is personal choice if you need/want to run a graphical tool for it, but it is not needed.
XFCE is not having a BT-GUI tool included.
We will not enable bluetooth by default, as it is a risk on security and wrong for powersavings.
See here how to connect to BT-Headset:
https://wiki.archlinux.org/index.php/Bluetooth_headset
They are many ways to automate connections.