There are some Raspberry PI for development of small robots. Here are details and suggestions for their use.
Tested OS and versions
Tested I/O devices
Monitor (HDMI), mouse, keyboard
Tested wireless communication
Tested wired communication
- Raspberry PI support a USB bus tree of max depth 5. Consider that bus extenders usually contain 3-4 levels each.
- The current provided by the card to the USB bus is 500 mA max. Check the requirements of what you attach to the USB bus. In case, take power from elsewhere (e.g., for Arduino), or use a powered bus extender.
- Problems with USB: suggestions for debugging, limits of cascade, power, and others.