How to install a wireless brother printer on Manjaro Linux
pamac install manjaro-printer
sudo gpasswd -a yourusername sys
sudo systemctl enable --now cups.service
sudo systemctl enable --now cups.socket
sudo systemctl enable --now cups.path
pamac install avahi sudo systemctl enable --now avahi-daemon.service
Install printer firmware from AUR, in my case:
pamac build brother-dcpj1200w
Restart cups
sudo systemctl restart cups.service
Finally add printer
lpadmin -p DCPJ1200W -E -v ipp://192.168.1.2/ipp/print -m everywhere
Scanner
pamac build brscan4