Research On Multi Node Networking Technology Based On Zigbee Pro

Since the establishment of the ZigBee alliance in October 2002,Zigbee protocol developed from ZigBee 2004,ZigBee 2006 to ZigBee pro(ZigBee 2007).As an important part of the Internet of things' technology,ZigBee technology is widely used in military,automotive,medical,intelligent home and other areas,the stability,reliability and capacibility of ZigBee network has become a hot topic.In node networking under ZigBee protocol,we found that ZigBee network nodes begin to random connect from time to time,with the increase of the number of nodes: when the nodes' number reaches a maximum,a newcomer node will be online at any time,and one online node or more will fall offline,the topology of the ZigBee network will change at any time,and the network becomes unstable;At this time,the sensor nodes in ZigBee network(temperature,humidity,pressure,light,carbon dioxide,etc.)and control node(GPIO)can not work properly,resulting in the network run abnormally.Based on the basic principle of ZigBee and a number of repeatable experimental data,this paper analyzes the reasons of falling offline in the ZigBee network,finds the maximum node capacity of the ZigBee network stability in the experimental environment,and puts forward a method to improve the capacity of a ZigBee network node.