| Smart greenhouse environmental monitoring and control system is designed for the teaching and management of greenhouses in the agricultural training base of Heilongjiang Agricultural Economy Vocational College.Currently,the greenhouse base of agronomy specialty in our college is in the traditional manual management,all the growth links of crops need human intervention,and the climate has a great influence on the crops.In recent years,with the rapid development of Internet of things technology,its technology has become mature,thereby making construction costs gradually decline and providing favorable conditions for the transformation of greenhouses.The smart greenhouse based on the Internet of Things can promote our capacity of teaching and research whilst accumulating technology and experience lay the foundation for further practical use in the future.Based on zigbee wireless transmission technology,the greenhouse environmental monitoring and simple control system has been designed in this work.The main contents are:(1)studies the zigbee technology and compares it with common wireless communication technology on the market;study three network topology formed by the combination of three types of zigbee devices.The related technology on android platform has simultaneously been examined,and the HTTP server based on android system has been built by using the NanoHTTPD technology.(2)The demand analysis and overall design on the server and client have been implemented to determine the functions provided by client and server-side,as well as the communication method between client and server.(3)The framework of the client and server-side functions has been designed,the communication protocol has been defined.(4)The corresponding function has been achieved in accordance with the design requirements of each functional module.It is demonstrated that we have achieved the basic objectives by testing the system.The greenhouse based on the system can provide a better teaching and scientific research environments,whilst reducing the management burden of the greenhouse. |
