marry alen's blog : Where is the WPS Pin for HP printer located?
The HP printer generates a WPS Pin, a unique 8-digit number, to enable wireless connectivity with routers. You must pick the Wireless button under "Settings" to find the WPS pin for HP printer. After that, click Wi-Fi Protected Setup. Then pay close attention to the instructions displayed on the HP Printer screen. A PIN with eight digits displays on the screen of the HP Printer when you finally select the "WPS PIN" option.