Read pages 193 to 206 of the textbook.
The exercise can be done in pairs due to the limited number of XBee modules.
Your task is to write a program that uses the Arduino as a XBee transmitter and receiver.
For a "C", do the exercise described on pages 193 to 200 of the textbook.
For a "B-", do the "C" exercise but with a pair of XBee modules and show that the two modules are communicating.
Note the neither of the "C" and "B-" exercises require any programming.
For a "B+", have the Arduino control the XBee module. All it needs to do is send and receive data.
For an "A", write a Arudino/Processing system that does something interesting. For example, the Arduino could send data to a Pong program.