Design And Research Of Multi-sensor Agricultural IoT System For Greenhouses

The Internet of things(Io T)can use advanced data acquisition technology,data transmission technology and big data technology to quickly,clearly and efficiently present the data that people are concerned about.As a new technology,agricultural internet of things technology is still in its infancy.Traditional agriculture generally uses relatively backward agricultural tools for cultivation and irrigation.The time of operation is mostly determined by experience,which is not conducive to the further development of agriculture.However,modern agriculture based on the Io T can make good use of various sensing equipment and communication equipment to measure crop growth environmental parameters,make accurate judgments of crop requirements,and realize the real precision tillage.So,the crops can be controlled to grow in the best environment,to guide agricultural production.In this paper,an intelligent multi-sensor network platform was built based on the relevant parameters affecting the growth of crops such as temperature and humidity,CO2,soil moisture and light intensity in an agricultural greenhouse.The hardware and software were designed for realizing functions such as detection and report,control of feedback equipment,remote monitoring and remote control of users.Through the agricultural internet of things platform,users can grasp the real-time situation of farmland anytime and anywhere so as to realize modern agriculture information,automation,intelligence.Specifically,the main research results and contents of this paper are as follows:(1)The agricultural iot was analyzed,combining with the perception layer,transport layer and application layer three system levels with some system functional requirements put forward by a greenhouse environment,the key technologies of Internet of things of agriculture such as information awareness,information transmission technology,serial port communication technology and data analysis and processing technology,iot,sensors,wireless MESH network,etc were applied to build the advanced modern agricultural greenhouses sensing iot hardware and software architecture as a whole.(2)The software and hardware of the system are designed respectively.The hardware system mainly includes three parts: sensor part,network node part and data gateway;the software system mainly includes data acquisition software,software for reporting and transmitting data,network node system design and client.The network node adopts STM32F103 chip and integrates the ltp5902-p wireless module on it.The data collection and upload are realized by configuring various sensor interfaces.The data gateway can connect multiple network nodes,realize the "multistage hop" connection of nodes,and ensure the data can be uploaded stably.(3)The functional tests for each module of the built system were carried out,mainly including data acquisition performance test and server performance test.Each sensor can normally collect environmental parameters to network nodes,and the cloud server can be well connected to the gateway.Through automatic data analysis and processing,the system can intelligently control the equipment to work normally.In summary,this paper studied and designed a physical model of the multi-sensor agricultural Internet of things system.Through the field test,the performance of the equipment basically meets the requirements of the system,and the system can realize functions such as data collection,upload and cloud monitoring of users.This system is expected to be used in agricultural production practice to monitor the growing environment of crops in a greenhouse and guide the production and management of crops.It has certain theoretical and practical significance.