1.XBee Series 2 improves on the power output and data protocol.
3.Point to point and multi-point networks are supported.
XBee 2mW Wire Antenna (ZigBee Mesh)Zigbee Wireless Data Transmission Module Communication Modules Sparkfun Imported-Series 2
This is the XBee XB24-Z7WIT-004 module from Digi. Series 2 improves on the power output and data protocol. Series 2 modules allow you to create complex mesh networks based on the XBee ZB ZigBee mesh firmware. These modules allow a very reliable and simple communication between microcontrollers, computers, systems, really anything with a serial port! Point to point and multi-point networks are supported.
These are essentially the same hardware as the older Series 2.5, but have updated firmware. They will work with Series 2.5 modules if you update the firmware through X-CTU.
Note: If you are looking for a simple point-to-point configuration, you might want to try the Series 1 instead. The Series 2 requires considerable setup and configuration. We highly recommend Building Wireless Sensor Networks as a guide for setting up mesh networks.
Note: If you are using these outside of the United States, please check with your local laws regarding radio communication.
XBee – According to Digi “XBee modules are embedded solutions providing wireless end-point connectivity to devices. These modules use the IEEE 802.15.4 networking protocol for fast point-to-multipoint or peer-to-peer networking. They are designed for high-throughput applications requiring low latency and predictable communication timing.“ So basically XBee is Digi’s own Zigbee based protocol. In layman’s term they are wicked cool, and fairly easy to use wireless modules.
Zigbee - An alliance and a standard of cost and energy efficient mesh networks. XBee uses the Zigbee standard and adds to it and wraps it up in their own neat little package.