Peripheral Tutorial?

Hi,

 

What tutorial is best for learning to work with peripherals?  For example, I want to work with USB ports and eventually run a multiple axis robot with sensors, actuators, and a webcam.  Maybe even do it using a wireless USB device.  Where would I learn to work with things like that as well as scanners and printers controlled by Squeak, Croquet, or Seaside?

 

Thanks much.

 

Kirk Fraser

Clatskanie, OR

USA