> Yeah, I have no idea what GPIO is, nor what it might be useful for. Does
> it just mean that you can change the logic level of the pin by writing
> some bytes to memory? What are the voltage levels? Presumably you can
> *read* from these pins as well?
>
> It sounds sort-of interesting, but I'm not sure what you could
> realistically use it for. The best I can come up with is putting the Pi
> in a box and connecting the GPIO pins to some buttons so you can control
> the device while it does... whatever the hell it does.

http://www.raspberrypi.org/phpBB3/viewforum.php?f=15

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