If I understand this correctly, this is a paper about 3D printing physical objects, with no electronics, that send information over wifi.

ie, magic.

This is magic.


@ajroach42 not really sending information over wifi (backscattering, producing radio signal that doesn't really have anything to do with wifi), but yeah, magic.
I'm curious how well it works, and what is involved on the receiver end (haven't read the paper yet)


According to the video, the goal is for the backscattered signal to interact with wifi receivers, unless I'm misunderstanding something.

@ajroach42 @Thib In the first few pages, I see no reference to "wifi receivers". They very carefully always say "RF receivers including WiFi".

@kurtm @Thib

At some point, the difference between a "wifi receiver" and "RF receivers, including wifi" is splitting hairs, yeah?

Like, I understand that wifi is a specific protocol that uses a spectrum shared by lots of other devices, and that without the ability to generate more complex signals it won't actually be "wifi" but if a standard wifi radio can receive these signals and be made to understand them, wants the point of the pedantry?

@ajroach42 @kurtm the thing is, it will only fall in the same range of frequencies as WiFi, but the modulation has nothing in common and it will completely ignore the protocol. So it's far from obvious how WiFi receivers could handle it.

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