Configure your WiFi Scanner for Brother DCP 7055W
Source: http://askubuntu.com/questions/395926/brother-dcp-7055w
First download and install the drivers: click here
Update /etc/sane.d/dll.conf .You must add a line with the text: brotherth4
Check the printers:
$ brscan-skey -l
Add the new printer with your new IP:
$ brsaneconfig4 -a name="WiFiScanner" model="DCP-7055W" ip=192.168.1.40
You can check the IP at your printer settings or you can try to find it using nmap (it can take a while).
$ sudo nmap -O 192.168.1.0/24 Starting Nmap 6.47 ( http://nmap.org ) at 2016-07-02 14:14 CEST Nmap scan report for 192.168.1.40 Host is up (0.0090s latency). Not shown: 993 closed ports PORT STATE SERVICE 21/tcp open ftp 23/tcp open telnet 25/tcp open smtp 80/tcp open http 515/tcp open printer 631/tcp open ipp 9100/tcp open jetdirect MAC Address: 00:80:92:C9:02:D2 (Silex Technology) Device type: printer|webcam Running: HP embedded, Brother embedded, Sony embedded OS CPE: cpe:/h:sony:snc-rz30n OS details: HP LaserJet (1020-, 2010-, 2600-, 2800-, 3050-, or 3390-series), or Brother (DCP-375CW, HL-5250DN, HL-22700W, MFC-7840N, MFC-8860DN, or MFC-9970CDW) printer; or Sony SNC-RZ30N network camera Network Distance: 1 hop ....
If you have changed your IP you can remove your old printer with:
brsaneconfig4 -r OLDNAME