In order to make crops grow in the most suitable environment,a remote automatic monitoring system for agricultural greenhouses is designed by combining the Internet of Things(IoT)technology and Qt Creator development environment.The system consists of four parts:data acquisition and storage,video monitoring,data display and feedback control.The sensors deployed in the greenhouse collect the environmental data in the greenhouse in real time,use the microcontroller as the main control,and combine the measurement and control system of the greenhouse with Qt Creator through WIFI.At the same time,the system supports two control modes:automatic and manual.Users can view the real-time data of the environment in the greenhouse through the Qt Cre-ator interface and manipulate the fill light,cooling fan,spray switch,ventilation fan and other equipment in the greenhouse.Through the test,it can be obtained that,the relative error between the Qt Creator display temperature and the actual temperature of the greenhouse is distributed between-0.44%and 0.43%,and the relative error between the Qt Creator display humidity and the actual humidity of the greenhouse is distributed between-1.52%and 2.13%;in the case of abnormalities of each environmental data,the relevant equipment can be automatically turned off and on.It shows that the system has high control precision and high real-time automatic control,and can realize remote monitoring and control of agricultural greenhouses.
internet of things technologyQt Creatormicrocontrollerwisdom agricultureautomatic monitoringvideo monitoring
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