Is there any way to do USB over Bluetooth (i.e. Connect to an external HDD via a bluetooth bridge of sorts)
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M$
It is just an idea, I haven't assembled anything like this before ;)
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Also bluetooth isn't very fast (which profile were you thinking - serial? audio? obex?).
Whatever you may want to do - since you weren't specific as to goal - might be expensive and/or complex. Yes, I could do it, but you would need maybe an old PC or laptop...
That said, it is easy to read and write SD/SDHC cards, and they go up to 32Mb, so work well in embedded via SPI. Whatever you want to do, it might be doable, and even easy.
For example, the EyeFi will upload any valid JPEG in the DCIM structure over WiFi. I've used this to copy logged data to my Picasa account (I also have qrcode to jpeg which fits nicely in an arduino, but you can use single black pixels with a lot of metadata fields).
sparkfun.com has the openlog and SD card BoBs among other things.
github.com/tz1 has my stuff including the qrcode and sparkfun stuff.
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The best way to do this is to use USB over IP (from FabulaTech) Server (WinCE or Linux ARM) on the HDD side and USB over IP Client on the desk side.
You can use bluetooth to transport the IP packets, and then USB over IP but I don't recomend it.
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