by ober » Wed Jan 15, 2014 2:37 pm
XBee Series 2. ZigBee is not XBee. XBee is a product brand name from Digi International. There have quite a number of wireless product using XBee. Series 1, series 2, and also WiFi also named with XBee. While Zigbee is a wireless standard, like Bluetooth and WiFi.
You can simply load a blank sketch, nothing in setup() and loop(). The purpose is to makesure UART pin is not activated.