Can I wirelessly scan from my older HP printer?
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 If you're connnecting to your scanner wirelessly then wireless scanning is mostly impossible.  HP does have the ability to scan wirelessly on some models but even on the models supported, it usually doesn't work.  It's still best to plug up directly via usb if you want to scan from your printer.  I've not come across any other printer manufacturer that can scan wirelessly yet other than HP.  But hopefully the technology will grow in the near future.