How do I set up wireless printing on the ET-2850?
Press the home button, select Wi-Fi Setup, choose Wi-Fi (Recommended), then select Wi-Fi Setup Wizard. Select your wireless network name (SSID) from the list, enter your password using the arrow buttons and OK button to confirm each character, then press OK to complete setup. If successful, the blue Wi-Fi icon will display on the LCD screen.
From the official Epson EcoTank ET-2850 All-in-One Printer manual, page 31
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