[gregsadetsky]

I remember - or maybe am mis-remembering - that years ago, SD cards used to exist with wifi access. I'm not sure whether you could read the card remotely? Or the card presented itself as a card, but actually streamed your data? But I remember that they existed?

But the thing that struck me even more is that - again, I may be wrong - those cards actually ran Linux? They were super tiny computers?

In a sense, I find it incredible because - is there a parallel world where we'd all be using SD cards as micro computers, and would just have small docks with usb/ethernet? These could have competed with Pis, could be deployed as micro servers..?

Anyway, if someone has real actual information, I'd love to learn more!

Actually - this article [0] seems to imply that this whole micro-world is sorta dead? But wifi SD cards are real and exist? Do they run Linux...??

[0] https://www.mbreviews.com/best-wifi-sd-card/

[LeoPanthera]

Indeed, you are thinking of the eye-fi. https://en.wikipedia.org/wiki/Eye-Fi

[EvanAnderson]

Transcend made some too. I starred this blog in my feed reader, back in the day, w/ some exploration of their cards: https://jamesone111.wordpress.com/2014/03/19/exploring-the-t...

(Having my old feed reader archives is useful! >smile<)

[blitzar]

These made wirelessly syncing your pda a simple 8 step process back in the day.

[duskwuff]

You're correct on both points.

Some early wireless cards used SDIO to communicate with the host computer. These are long gone.

There were also some later SD cards which contained an embedded controller running Linux, which emulated an SD storage card and exposed its contents over wireless. The latter are what that article was about.

[joezydeco]

I'm currently using an Ezurio WiFi/Bluetooth module in a project and it still uses SDIO to communicate with the host. Only difference is that it's a much smaller module welded down to the PCB.

The dev kit, however, still has the traditional interface.

https://www.digikey.com/en/products/detail/ezurio/453-00045-...

[rjsw]

This was one of the use cases of the SDIO [1] specification.

[1] https://en.wikipedia.org/wiki/SD_card#SDIO_cards

[horacemorace]

I deployed many of those things successfully a decade ago. Worked great!