How do I connect my ET-3850 to a network using WPS?
Select the network icon from the home screen, then choose Wi-Fi (Recommended) > Start Setup or Change Settings > Push Button Setup (WPS) and follow the on-screen instructions. You must select Start Setup within two minutes of activating WPS on your router. Once connected, the Wi-Fi icon will appear on the LCD screen. (Page 42-43)
From the official Epson EcoTank ET-3850 All-in-One Printer manual, page 42
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