How do I use Wi-Fi Direct printing without a router?
Make sure Wi-Fi Direct is enabled by touching the Wi-Fi Direct icon and then the Settings icon on the printer control panel display to check the status of Wi-Fi Direct, network name and password. For more information, visit www.hp.com/go/wifidirectprinting.
From the official HP Officejet 3830 All-in-One Printer manual, page 2
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