Design And Realization Of Farmland Meteorological Information Detection System Based On Wireless Sensor Networks

With the development of the national economy and the progress of science andtechnology in our country，one of the nerve endings of Internet of things——Wirelesssensor networks (WSN) has made great progress, used in data acquisition, industrialcontrol and other fields by more and more people in daily life. It has gradually formeda new technology with the development of the embedded technology, wirelesscommunication network technology, distributed information processing and sensortechnology: wireless sensor network; It provides a new method for informationacquisition, processing and transmission, except in some traditional areas, it is alsogradually applied to wider fields. It has caused the people’s extensive concern in thefield of agricultural production based on wireless sensor networks; it is to change thetraditional mode of agricultural production at present. WSN has great significance forpromoting China’s agricultural modernization development, it is also the importantcarrier of the efficient use of scarce land resources in china.Farmland acquisition meteorological elements provide strong support for thedevelopment of modern agriculture；it is also an important part of the production ofprecision agriculture, the growth and constant crop of great influence. It has greaterimpact on the growth and yield of crops. According to the modern agriculturalmeteorological information collection requirements, visualization, real-time, remotecontrol design principles, we designed farmland meteorological information detectionsystem based on a solar-powered wireless sensors network, completing theenvironmental temperature and humidity, soil temperature, soil moisture, rainfall,wind speed, light intensity and other farmland basic elements of informationcollection, storage, processing and analysis, providing critical data to supportmanagement decisions for precision agriculture. System’s hardware has varioussensor interface circuit based on the core processor STM32F103C8T6, CC2530 wireless communication module，solar charge controller which has the function ofmaximum power point tracking(MPPT) based on LTC3845A<C4000-1，PC hostcomputer software and implementation of observation automation are the softwarepart of system.According to the environmental characteristics of farmland, completing thesensor selection and design of modular hardware circuit for environmentaltemperature and humidity, soil temperature, soil moisture, rainfall, wind speed, lightintensity seven basic farmland elements. Collection terminal control software isprogramming by modular design idea, into a plurality of tasks to complete, and finallythe μC/OS-II was ported to the STM32F103C8T6. Gateway nodes and end nodes ofWSN were developed based on Z-Stack. To ensure the communication seamlessconnection between collection terminals and terminal nodes and wireless datatransmission, PC and gateway node, designing Serial communication protocol.Designing the data monitoring platform based on the.NET platform. The detectionsystem achieved the basic elements of farmland acquisition and processingautomatically, system hardware is stable and reliable, data is accurate, the systemsoftware is simple and practical, achieving the desired goal, making the detection offarmland meteorological information from traditional to modernization, the collectionof information more quantitative, can guide the modern agricultural productionpractices more and more. Finally, the test results achieved the desired goals of theproject, meeting the acceptance criteria after the system overall test..