If you want to use the WPS button on a router then you must follow these steps:-
First locate the WPS button on the back of the router.
Then press the button until the light starts flashing.
Then turn on the Wifi on your device and then search for the available connections.
Then finally search...
If you don’t know how to find WPS pin on printer with a digital screen then follow these steps:-
First turn on your printer or restart it.
Then press and hold the wireless button from the control panel of your system.
Now the light will start flashing once the wireless mode is turned on.