Design On Remote Monitoring And Control System For Distributed Greenhouse Group Based On Zigbee And GPRS

In the current society,the “digital informational agriculture” has been a key strategy of the development of agriculture economical in the world.The agriculture economical incomes and the productions are improved by designing,managing and controlling the process of agricultural production.People can realize the productions growing status and the change of environment through the informational supervision and make the corresponding measures which has the significant meaning of the high and stable productive in the agriculture.Aiming to solve the problem of complicated routing,unstable management,over cost,low accuracy and rate in the traditional greenhouse monitoring system.In this paper,we integrate GPRS technology into Zigbee wireless sensor network,designing a remote environment supervisory of green house group.Firstly,we obtain the environment information parameters of the green house via Zigbee sensor networks,and then disseminate the data to users’ mobile terminal by GPRS after compressing the original data.Users can check the data in the phone application and make corresponding measures.The system is easy to handle and transmit stably through the field validation.Our detailed contributions are shown as follows:(1)We design the whole system hardware circuit.We deploy the sensors and CC2530 chips in the data collecting terminal,the modulator is consist of STM32 microcontroller chip,CC2530 chip and GPRS communication module and finally,the perform equipment circuit is established by equipment motor and relays.(2)We finish the user terminal operation interface and realize the remote operation.People can access the inner environment status of the green house and make the corresponding actions via the application in the android phone.(3)We test the data accuracy and transmission stable through the yield validation.By comparing with the standard instrument,our system has an average error rate of ±3%,and then we test the packet loss rate under different communication ranges,the experimental results show that packet loss reaches 8% in the range of 400 m and increases significantly when the range beyond 500 m.Finally,we validate the accuracy and stable communication transmission through the comprehensive analysis.