The Preliminary Design Of Zig Bee For Wireless Sensor Network And ASP.NET Technology Used In Intelligent Granary

Grain as a special commodity and an important strategic material for the healthy development of national economy and social stability and harmonious development plays a key role. As a large agricultural country, a large number of surplus food grain have reserved every year in China,that has become a major event in the work of the people’s livelihood.In order to reduce losses in Grain silos, monitoring and control of grain situation is the focus of the current smart granary studied.With the development of wireless sensor network technology and computer technology, ZigBee-based wireless communication network technologyis becoming increasingly common in measuring and controllingsystem. This technology not only improves the arduous task of wiring monitoring methods using in traditional granary, but also improves the accuracy and stability of measuring and controlling systems. This paper describes the preliminary designing of ZigBee wireless sensor networks and ASP.NET technologies used in smart granary. According to the analysis of the functional requirements of the system design PC and lower computer.The lower computerinclude terminal acquisition moduleused in the Cortex-M0 as the main chip, the external build temperature and humidity sensor module DHT11 and flame sensor, they respectively collectingdata of granary temperature and humidity conditions light conditions; increasereal-time communication between USB- serial communication module with the PC on the coordinator node; relay module is mainly to achieve cooling or exhaustcontrollingaction. Selecting CC2530 ZigBee wireless communication chip transmission module is mainly responsible for receiving and sending data.CC2530 acquisition module in the terminal and serial communication module has applications.The PC using the Z-Stack ZigBee protocol stack to achieve the establishment of a network, so that data is displayed in the PC interface, the use of ASP.NET technology to build websites includes building site designing,gateway software designing sensor acquisition nodedesigning, remote management and control designing. In this paper, innovative use of ASP.NET technology, making managers view the granary situation through a handheld device visiting the Web site. The handheld devicecan seta environment threshold in web.when the threshold is exceeded,it can make the alarm to remind on the PC side, meanwhile the handheld end device can also control relays to make the appropriate treatment.Finally, throughthe system debugging and website features testing,。This system successfully collect the date of temperature and humidity and flame, and successfully upload the information to the PC and web, relays work well.This system meet the thesis set forth in the functional requirements.