With the XBee mounted on its breakout board, position the breakout board in the center of your breadboard so that the two rows of male header pins are inserted on opposite sides of the center trough.

Use red hookup wire to connect pin 1 (VCC) of the XBee to 3.3 volt power. See Figure 3-7.

Use black hookup wire to connect pin 10 (GND) of the XBee to ground.

Use yellow (or another color) hookup wire to connect pin 2 (TX/DOUT) of the XBee to digital pin 0 (RX) on your Arduino (see Figure 3-9).

Finally, use blue (or another color) hookup wire to connect pin 3 (RX/DIN) of your XBee to digital pin 1 (TX) on your Arduino. Figure 3-10 shows the connections to the XBee.