Wireless Measurement And Control System For Agricultural Internet Of Things Based On 433MHz Frequency Band And Its Application

In the agricultural production process,the application of Internet of Things technology can help to improve the yield of agricultural products,reduce the cost of agricultural products.However,the agricultural production environment is more complex,terrain,weather,plant species change,which not only to the wired transmission line wiring difficulties,but also affect the wireless signal,especially high-frequency signal 2.4GHz transmission.Therefore,based on the deficiency of 2.4GHz Zigbee technology in agricultural application,this paper presents a 433MHz wireless measurement and control system for agricultural object networking.In this paper,the status quo of the research on agricultural internet of things at home and abroad is reviewed,and the composition of the system and related technical points are introduced in detail.On this basis,the wireless measurement and control system of agricultural object networking based on 433MHz is designed and developed.The system consists of hardware and software components.The hardware part mainly completes the circuit design and development of 433MHz wireless communication circuit and two kinds of new sensors,and tests the hardware performance and reliability.The test result shows that it can fully meet the requirements of agricultural production environment.The software part transplanted the RTX of embedded real-time operating system and completed the application software modules under the real-time operating system management,thus formed a complete wireless measurement and control software system of agricultural object networking based on 433MHz.The system has been applied in a number of agricultural projects.In this paper,an example of a rural sewage treatment station is selected,and the practical application of the system is described in detail.Finally,this paper also summarizes the work that has been done,and puts forward the further research direction according to the development trend at home and abroad.