As you now know, there are several useful ways of connecting wirelessly with your Arduino. You can choose a simple, inexpensive RF interface, a long-range XBee interface, or a standard interface such as Wi-Fi. Now, your robot can go untethered, needing only an occasional battery charge to keep it up and running.

In the next chapter, you'll learn how to connect a GPS device to your Arduino so that you can find out where you are and plan your next move.