Design And Implementation Of Greenhouse WSN Control System Based On ZigBee Technology

As China's economy burgeons,modern agricultural technology has made a great stride.China is a country strong in agriculture and Chinese government attaches great importance to the agriculture.Greenhouse engineering has become an important integral part of high-efficiency agriculture.Intelligent greenhouse utilizes advanced technology and modern facilities to artificially control environmental conditions of crop growth,which allows crops to grow throughout the year with high efficiency,high yields and high return and immunize the impact of natural climate.The existing greenhouse monitoring system mainly adopts wire communication technology.In spite of good device-interoperability,good signal stability and other advantages,there still exist problems like high cost,complex wiring and inconvenient maintenance.Accordingly,it has hindered its further application in greenhouse.That is why it is an essential topic to design a greenhouse management system with new communication technology so as to make it adapt better to actual production.On the basis of research on basic process and features of intelligent agricultural greenhouse control,this study adopts an underlying communication technology with ZigBee technology as its main body,builds a wireless sensor control system for greenhouse with three-layer internet of things as its main structure,and develops related terminal control system.Hence,it realizes the intelligent management of agricultural process.The bottom layer of this system is designed with a wireless sensor network composed by ZigBee nodes and connected with various actuators like sensor,pump and relay.Data are stored and transmitted between principal computer and web server via socket two-way communication technology,exchange with database server and then communicate web page and mobile APP.The middle layer is a server with WiFi gateway,which accomplishes two-way communication via socket and websocket data transmission protocol.The server and applicable client terminal are developed with Qt,and mobile terminal is developed with Android Studio.In this way,it realizes various functions such as real-time data display,equipment control,threshold control and dynamic log viewer.Due to its multi-hop self-organizing capability of ZigBee networks and underpinned by its star topology structure,the system builds a flexible self-organizing network for bottom sensors,thus greatly enhancing the flexibility and maintainability of the whole system.The system works well in actual setting up and model test running,and has instructive significance to practical production.After actual setting up and running model test,the system functions well and exerts instructive significance to practical production.