Study On Application Of Greenhouse Monitoring System Based On ZigBee

Information resource sharing is one of the most important questions faced inthe advancement of agricultural information. The paper uses wireless sensornetwork technology based on the ZigBee to solve current greenhouse distributedcontrol system's insufficiency and realize the greenhouse network informationmanagement, and the paper will be a new attempt about the wireless sensornetwork's application in the agricultural information.The paper emphasizes on the study of the ZigBee technology agreementsystem structure and the design of nodes. Firstly, the paper starts from the ZigBeenetwork topology and analyzes star and coordinated these two kinds of basictopology and on the above foundation the paper introduces the Mesh network'scharacteristic and proposes an idea which uses the advanced Mesh network torealize the greenhouse monitoring. Secondly, the paper introduces the systemstructure of ZigBee technology and analyzes the physical layer specification of2.4GHz frequency band, the frame structure of MAC layer, the CSMA-CAalgorithm, the assignment mechanism of network address and the flow of networkrouting detailedly and provides the theory foundation for the node design. Finally,the paper gives a detailed explanation from hardware and software aspects aboutthe node design, gives a concrete realization method, proposes design rules aboutthe ZigBee low power system, analyzes several matters which should be givenattentions in the radio frequency circuit designs, gives a ZigBee node debuggingmethod.