Research On Low-Power Farmland Environmental Monitoring System Based On LoRaWAN

With the development of Internet of Things technology,agriculture is also transforming towards intelligence and modernization.The monitoring of the farmland environment is realized through sensors and wireless communication technologies,and timely acquisition of agricultural environmental information is crucial to agricultural production,which helps users make more scientific decisions.However,traditional wireless communication technologies such as Zig Bee,Wi-Fi,and 4G have many limitations in terms of communication distance,power consumption,transmission quality,and networking,making it difficult to meet the needs of large-scale farmland environmental monitoring.This paper integrates embedded technology and wireless communication technology,and designs a low-power farmland environmental monitoring system based on LoRaWAN.The system has wide coverage,low power consumption,low cost,and little dependence on cellular signals,which can well solve the above-mentioned problems in farmland environmental monitoring.The main work and innovations of this paper are as follows:(1)Aiming at the problems of high power consumption and poor transmission quality of traditional data acquisition equipment,this paper designs a low-power data acquisition terminal and gateway for farmland monitoring.The hardware circuits of data acquisition terminals and gateways are professionally designed with low power consumption.At the same time,low-power data acquisition technology and deep sleep technology are applied,and specific optimizations are made for different sensors in terms of power consumption,so that data acquisition terminals can operate at When the data is sent,the average value of the current drops to 13.63 m A.The working life of the 2000 m Ah battery can reach 2 to 3 years,and the system cost can be reduced.(2)Aiming at the problems of poor versatility and high dependence on cellular signals of conventional data acquisition software,an embedded software dedicated to farmland environmental monitoring is designed.The software can automatically identify and adapt different sensors and realize data collection.At the same time,the deep sleep technology is used to control the sleep of the single chip microcomputer,which reduces the power consumption of the system.In addition,the data transmission based on LoRaWAN technology is realized on the embedded software,so that the communication between the data collection terminal and the gateway of the system does not depend on the cellular signal.As long as the gateway is within the coverage of the cellular signal,the system can realize long-distance data transmission,avoiding the high dependence of the farmland environmental monitoring system on the cellular signal.(3)Based on the completion of low-power data acquisition terminals,gateways and embedded software,this paper realizes the collection and transmission of farmland environmental information,and designs a visual cloud monitoring platform for display.The platform summarizes all the monitored environmental data in real time,and displays the data in text and graphics,which is convenient for users to obtain farmland environmental information in a timely manner.In addition,the platform also has historical data query and alarm functions,which is convenient for users to analyze and make decisions on farmland environmental data,so as to realize intelligent management of farmland environment.The agricultural low-power moisture sensor developed in this paper has been applied in the Dahewan Farm of Hulunbuir Agricultural Reclamation Group,the unmanned rice-wheat rotation farm base in Wuhu,Anhui,and the unmanned jadewheat-bean rotation farm demonstration base in Bozhou,Anhui,with good results.Figure [52] table [11] reference [77]...