The Design Of Greenhouse Measurement And Control System Based On The Internet Of Things Platform

With the rapid development of China’s economy, China’s agriculture is in a new stage of transformation, which is from traditional agriculture to high-quality, efficient and productive agriculture as the goal of modern agriculture. Greenhouse is an important product of modern agricultural facilities, which has been widely used in most parts of the country. At present, small and medium-sized greenhouse data acquisition system mostly adopts the mercury thermometer or cable data acquisition way. Workload is big and efficiency is very low. Small greenhouse temperature monitoring system mostly uses analog temperature sensor, multi-channel analog switches, A/D converters, microcontrollers and other components of the transmission system, which are susceptible to interference signal and measurement error.Aiming at the small and medium sized greenhouse including temperature detection and control system, this thesis uses single-bus technology and microcontroller technology. Meanwhile, it is key to use the WIFI wireless transmission technology and the Internet of things platform, which is designed for small and medium greenhouse. The system consists of acquisition module, microcontroller module, wireless module and YeeLink cloud platform modules. Compared with cable transmission, the wireless transmission has the unique advantages of high-speed, convenience, low cost. The Internet of things technology has the characteristics of intelligent.The system including hardware and software is designed to realize function. The design adopts the module of ideas including temperature data collection, wireless transmission and minimum microcontroller system and drive circuit module. At the same time, we also need to consider the selection of components.In the aspect of software design, this thesis, based on the overall functional requirements, designs whole software system architecture diagram. According to the associated software, we can design each module program. Finally, we can achieve function.System testing is behind the software and hardware design, hardware and software tested according to the needs of each functional module, and a detailed analysis combined with functional requirements based on the measured data, and with the results of the analysis to determine the system parameter.Through practical tests in greenhouse, this system designed in has advantages of real-time display, remote control of things, simple installation, low power consumption, high measurement accuracy and strong stability.