Design And Implementation Of Farmland Monitoring Device Based On Agricultural Internet Of Things

Agriculture is the basic industry of national economic development.Combining Internet of things technology with agricultural production,Bring unexpected changes to traditional agriculture through new technology and new ideas.This paper designs a farmland monitoring device based on Agricultural Internet of things,and realized the function of field parameter acquisition and video monitoring.Through the real time monitoring of crop growth environment,it has a great significance for the scientific management,disaster monitoring and corps production.First,for the part of parameter acquisition,building Zigbee wireless communication network in farmland,and choosing Raspberry pie as gateway to connect Zigbee farmland LAN and Internet.Raspberry pie is not only responsible for collecting data from the coordinator,And upload the data to the server through HTTP protocol.In this way,The farmland parameter information is shared on the Internet.In the parameter acquisition module,two environment nodes and one receiver are designed,that is,a basic star network structure is constructed.The receiver is composed of coordinator and Raspberry pie.For environment nodes,they include sensor modules,STM32 node controller and Zigbee communication module.Among them,the main environmental parameters to be collected are light,air temperature and humidity,CO₂ concentration and soil humidity.These sensors communicate with controller through Modbus-RTU protocol in 485 bus mode.Secondly,In order to reduce the server load effectively,video monitoring adopts P2P technology to realize video transmission,and realizes communication between camera module and mobile APP.The design of APP includes environment parameter display and video monitoring display.That is,The mobile terminal obtains the parameter information from the server through HTTP,and establishes a connection with camera monitoring through P2P.At the same time,in order to solve the problem of outdoor power supply,verify the operability of the device,the solar power supply is adopted.After the design is completed,the device is debugged and field experiments are carried out.It is found that the scheme is reasonable and feasible,according with the scheme of Agricultural Internet of things,and has a certain practical value.In the software design,the STM32 node controller is designed with Cube MX and Keil for Arm software;the Zigbee program is developed by IAR software and Z-stack protocol;Raspberry pie is the bridge between Zigbee wireless network and server;In order to achieve stable and reliable access to the Internet,In terms of server design,Alibaba cloud server is used in server programming.And building a network service program based on Spring Boot framework.Finally,designing a simple APP,and displaying environment parameters and video information in this APP.Users can understand the changes in the field in real time by using the terminal APP.It is also the last link to realize the Internet of things project of farmland monitoring device.