XBee Programming Arduino Wirelessly. Minimum parts needed: (see Tom Igoe's parts list for additional details) Two 5-15VDC power supplies.
Radio Shack sells 4AA Battery Holders that are convenient for remote 3.3 Volt circuits. Two XBee OEM RF Modules soldered to breakout boards (as shown here, steps 1 & 2 only ) One setup to connect an XBee the serial (or USB) port on your computer. My example circuit for XBee firmware uploads works great for this purpose. An Arduino set up on a breadboard 3.3V regulator 2N2222A transistor (or similar) LEDs Assorted wires. ArduinoWirelessShield. Overview The Wireless SD shield allows an Arduino board to communicate wirelessly using a wireless module.
It is based on the Xbee modules from Digi, but can use any module with the same footprint. The module can communicate up to 100 feet indoors or 300 feet outdoors (with line-of-sight). Arduino to Xbee. The simple thing xbee can do is to replace the serial connection wirelessly.
You can do this pretty much out of the box. It is like replacing the USB cable of arduino (serial communication) to invisible cable (wireless). Xbee-Xbee Communication.