4.2″ and 7.5″ NFC-powered e-Paper Displays Work without Battery

Re:4.2″ and 7.5″ NFC-powered e-Paper Displays Work without B... by zndr on Tuesday March 17, 2020 @12:43PM (#22606826)

We already power our iPads via POE< which is also how you'd power those beacons, so it's not really a great improvement.

BUT the idea that you would "tap in" to book it would be great.

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Re:4.2″ and 7.5″ NFC-powered e-Paper Displays Work without B... by EvanAnderson on Tuesday March 17, 2020 @03:16PM (#22609018)

I'm talking about radio energy powering the device. 802.1 beacon radio frames, which your access points send out over the air. Configure it via USB, etc, then just hang it on the wall. No cables. Just a passive device.

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Re:4.2″ and 7.5″ NFC-powered e-Paper Displays Work without B... by walterbell on Tuesday March 17, 2020 @01:03PM (#22607105)

Is there a PoE to lightning adapter?

edit: $28 splitter, https://www.poetexas.com/products/af-lightning

And $100 Belkin Ethernet-PoE adapter.

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Re:4.2″ and 7.5″ NFC-powered e-Paper Displays Work without B... by robocat on Tuesday March 17, 2020 @02:33PM (#22608397)

Use a PoE to USB (female USB-A or USB-C) adapter - variety of models e.g. I saw one for $10 on Alibaba.

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