MailDeadDrop
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Re: SD card WiFi

Thu Sep 01, 2011 3:44 pm

I know there were some passing remarks made about using the now-discontinued SanDisk WiFi SD cards. The major problems pointed out were the obviously discontinued status and their limited capacity (256MB iirc).

But my inbox received an interesting announcement from IFA today:
Toshiba announces "FlashAir" Wifi equipped SDHC cards

I know next to nothing about the requirements for SDHC vs SD and whether Raspberry Pi is capable of SDHC, but it's an interesting development.

MDD

yoonsikp
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Re: SD card WiFi

Thu Sep 01, 2011 3:51 pm

Rpi is capable of SDHC im pretty sure

Svartalf
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Re: SD card WiFi

Thu Sep 01, 2011 3:59 pm

It's capable of at least SDHC. Most devices are. Unfortunately, though, pretty much all of these "WiFi" equipped cards won't bring WiFi to the R-Pi, avoiding the need for USB WiFi support. They're designed to push content from the SD card to a receiving server or in the case of these cards, peer devices- without any decent ability to re-purpose the WiFi on the device for full WiFi use.

obarthelemy
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Re: SD card WiFi

Thu Sep 01, 2011 4:00 pm

Indeed, this looks interesting. And mass market, so prices might not be too extortionate.
It's funny how they take great pains to avoid using the word "wifi", even though the thing is "IEEE 802.11b/g/n" with "WEP, TKIP, AES (WPA, WPA2)" compliant.
No clues about whether the thing is full-featured or not, the blurb mentions uploads and downloads, but not a true LAN connection nor drivers for regular OSes.

Svartalf
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Re: SD card WiFi

Thu Sep 01, 2011 4:12 pm

Quote from obarthelemy on September 1, 2011, 17:00
No clues about whether the thing is full-featured or not, the blurb mentions uploads and downloads, but not a true LAN connection nor drivers for regular OSes.

Odds on, it's not full-featured. Most situations you'll find for WiFi work well with a PCI card, USB dongle, or ExpressCard 32 upgrade if it's not on-board on the device. Since it's a bit of an unusual thing to expect your camera, for which these devices were designed, to view the "cloud" as anything other than the target server it's supposed to push photos to (or in the case of this new one, peer devices with the same SD card...), they don't provide any hooks through SDIO to the WiFi edge of the device.

obarthelemy
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Re: SD card WiFi

Thu Sep 01, 2011 4:21 pm

Can't you hack around it at some point ? I mean, the thing can send and receive. Couldn't it send and receive regular packets wrapped to make them compatible with whatever the card can handle, then unwrapped, converted to regular packets, and passed on to the interwebz on a proxy ?
This setup might make sense for a room (class room or barebones libray/cafe), with one server/proxy and a few clients. Might be worth it it the Airflash saves the bother and expense of a USB hub. A side benefit would be proxy = filtering (kids, kids kids ^^). Won't break any speed record for sure.

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Lob0426
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Re: SD card WiFi

Thu Sep 01, 2011 4:26 pm

In the eyefi card they were able to at least cut out the eyefi servers testing the content.
The SanDisk cards only had wireless B but they were full featured wireless devices I believe. Someone suggested that they had more than enough memory fo a bootloader to work with.
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obarthelemy
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Re: SD card WiFi

Thu Sep 01, 2011 4:27 pm

Expanding a bit, let's say the thing only handles jpegs for some reason, and specific src/dest dirs. A very barebones approach would be
- on the server, rename whatever files the class needs to jpeg, and put them in the right dir
- on the clients, DL via the airflash, and rename+move+adjust permissions.
Probably beats running around reflashing SD cards for each lesson ^^

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Gabriel
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Re: SD card WiFi

Thu Sep 01, 2011 9:05 pm

With this not so bad idea I don't think that it would be possible to download jpeg from the server, would it be ?
I mean, this card has been build to upload pics from the camera.
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obarthelemy
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Re: SD card WiFi

Thu Sep 01, 2011 9:22 pm

http://www.toshiba.co.jp/about.....0901-1555e
"The new card, "FlashAir™", has an 8GB capacity and supports both peer-to-peer transfers and uploads to and downloads from servers".

<slashdot mode>RTFA ^^ </slashdot mode>

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Lob0426
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Re: SD card WiFi

Fri Sep 02, 2011 4:20 am

The eyefi "server" checked to see if it a support file type. The toshiba says peer to peer, so it does not sound as if it is checked by a server. It may not care what files it sends. It just may need a lot of user interaction to operate. It may be able to be software hacked.
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Gabriel
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Re: SD card WiFi

Fri Sep 02, 2011 9:41 pm

Quote from obarthelemy on September 1, 2011, 22:22
http://www.toshiba.co.jp/about.....0901-1555e
"The new card, "FlashAir™", has an 8GB capacity and supports both peer-to-peer transfers and uploads to and downloads from servers".

<slashdot mode>RTFA ^^ </slashdot mode>

ooups ^^, sorry !
Definitly there is things to do with this SDIO card !
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hvfrancesco
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Re: SD card WiFi

Sat Sep 03, 2011 5:52 am

These kind of cards are outrageously expensive, even if you could manage to hack one to work as wifi device for rpi, I think it doesn't cope with project's philosophy

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abishur
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Re: SD card WiFi

Sat Sep 03, 2011 2:47 pm

Quote from hvfrancesco on September 3, 2011, 06:52
These kind of cards are outrageously expensive, even if you could manage to hack one to work as wifi device for rpi, I think it doesn't cope with project's philosophy

It is insanely expensive, but to be fair, a lot of us have the "why climb the mountain?" mentality. We want to do it because it's there! In that sense, even an overpriced trinket like this card fits in line perfect with the project (for the hobbyist side of things at least) ;)
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Lob0426
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Re: SD card WiFi

Sat Sep 03, 2011 3:50 pm

The eyefi card was $40 for 4GB at Wal-Mart. Not too bad. If it could have been hacked. The reason i liked it was that it supplied something a lot of people asked for with something we all needed, an SD card. It saved using up a USB port that could have been used for other things.and it reduced the overall load on USB bandwidth. A pretty good trade if it can be made to work.
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ahven
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Re: SD card WiFi

Sat Sep 03, 2011 8:48 pm


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