You can automatically connect to an wireless router by using a PIN code. You can use this method to set up if an wireless router is capable of WPS (Wi-Fi Protected Setup). Use a computer to enter a PIN code into the wireless router.
Tap 
on the home screen.
Tap Wi-Fi (Recommended).
If the printer has been already connected by Ethernet, tap Router.
Tap Start Setup.
If the network connection is already set up, the connection details are displayed. Tap Change Settings to change the settings.
If the printer has been already connected by Ethernet, tap Change to Wi-Fi connection., and then tap Yes after confirming the message.
Tap Others > PIN Code Setup(WPS).
Use your computer to enter the PIN code (an eight digit number) displayed on the printer's control panel into the wireless router within two minutes.
See the documentation provided with your wireless router for details on entering a PIN code.
Tap Start Setup on the printer's control panel.
Tap Close.
The screen automatically closes after a specific length of time if you do not tap Close.
If connection fails, restart the wireless router, move it closer to the printer, and try again. If it still does not work, print a connection report and check the solution.
Tap Close on the network connection settings screen.