Research And Design Of Wireless Sensor Network Node Based On Zigbee

The Wireless Sensor Network (WSN) is a multi-hop and ad-hoc network composed of a large numbers of sensor nodes, which are organized by wireless communication. This system provides users with useful information through data collection, processing and transmission. With the development of wireless sensor network, the sensor node which is the basic unit of wireless sensor network becomes the research hotspot.This paper introduces the architecture, characteristics and research status of wireless sensor network. Considering of the characteristics of wireless sensor network nodes, small, low-power consumption, limited capacity of storage and communications, the paper designed the wireless sensor network node based on ZigBee according to the ZigBee protocol stack characteristics of the structure.On the hardware design, the sensor node adopts CC2430 as core component which is a wireless communication chip based on ZigBee technology. This chip integrate 8051 microcontroller core. SHT11 temperature-humidity sensor is selected for collecting temperature-humidity data. The sensor node is supplied by two high-energy batteries. On the software design, the paper uses the C language to send and receive data packets and implements the trustworthy communication between nodes.Finally, combining the characteristic of the intelligent home, a ZigBee wireless sensor network is set up. The network was built by a number of designed sensor nodes based on ZigBee in this paper, and the testing and low-power analysis were conduct. The experimental results show: the designed sensor node has the feature of low-power consumption; the composed network system is stable and reliable and can meet the application requirements of the intelligent home.