Research And Implementation Of A Wireless Sensor Network Agricultural EnvironmentMonitor System Based On TinyOS

As a result of geographical dispersion,varied terrain and environmental conditions and other characteristics of agriculture,the development of multifaceted,networked,rapid and accurate methods that are capable of collecting information on crop growth and the environment deserves priority in agricultural information technology.Typically,a traditional agricultural information monitoring system uses a wired network or direct manual field measurement.Wired networks involve complex wiring,a rapid depletion of circuit resources.Manual field measurement is labor and resource intensive and inevitably produces errors in the results.Real-time monitoring in a large area can not be implemented in this manner.In order to achieve a wide range of real-time monitoring for complex agricultural environment.A TinyOS-based WSN agricultural monitoring system was developed in this study.It was used to monitor air temperature and humidity and soil moisture.Main contents and conclusions are as follows:(1)General structure design.The developed system included eight sensor nodes,a gateway node and a host computer.The sensor node was powered by a solar power supply,and they equipped with different sensors were deployed in three different agricultural environments for collecting data.All the sensor nodes could autonomously form a tree network and pass the collected data packets to the gateway node in a multi-hop manner.The gateway node communicatedwith a computer through serial ports.The collected data could be displayed and stored in the host computer for users to observe and query.(2)Viewing reducing power consumption and extending the life cycle of nodes as the prerequisite of the hardware system design.Integrated microcontroller and RF radio chip(CC2530)was used to form the wireless communication module.Low-power FDS100 and SHT10 was applied in the sensor module.Designing the solar power supply module to ensuring the energy supply of nodes.(3)The Sensor node and gateway node were developed in TinyOS-2.0.Using the sleep mode of RF chip CC2530 to reduce nodes power consumption,and developing upper computer software use Java language for communicating with the gateway node under the Eclipse integrated development environment.(4)Deploying the system in three crop environments,and testing the ability of signal transmission,power consumption and packet loss rate.Finding and solving the problems during the system operation,and improving the developed system.Results show that the system is stable,and the various performance can meet the needs of the agricultural environmental information monitoring.Thesis research results can provide a reference for related research and application in related fields.