The Design And Application Of Wireless Node Software And Hardware System Based On The "Four Senses" Detection System

China is a large agricultural country,and agricultural development in China is not ideal,and the surrounding environment seriously affects the growth of crops in the field soil,monitoring and change the field "four" information into the information of agricultural urgent,imperative.In this paper,Ye Shengzheng and Qi Tai Xinyuan rice field Zhongning wolfberny environment as the research object,through the wireless sensor nodes on the field in "four" information dynamic monitoring,and the Internet to the collection terminal node information is sent through coordination,which will be "four"field information into visual information.Users can send commands directly through the Internet to control the wireless nodes to perform the relevant actions,so as to achieve the purpose of agricultural information through the detection and change of the relevant environmental information of the field.This paper has completed the following work:The hardware is the foundation of the stable operation of the wireless node system.The hardware design of this paper is mainly about the bottom board and the function module.The node base includes power supply circuit for power supply to the nodes of the TTL circuit and the 485 circuit USB and PC communication,indicator light and buzzer circuit indicates the power supply,communication status and fault conditions,the power switch circuit to control the power supply module,programming interface circuit program to write a core module in MCU.The interface circuit is connected with the function module;The function module includes a core module of ZigBee network construction,switch and relay switch and relay control module,analog and digital input module is connected with the various types of sensors,the sensor output voltage amplification micro voltage amplification module,control solenoid valve action to complete the automatic irrigation motor drive module.The software is the basic of the wireless node system,and the software design is the software design of coordinator,router and terminal node.The coordinator software mainly completes the establishment of ZigBee network,and the routing node and terminal node and host computer communication;router software mainly completes the ad hoc network node,security data in coordinator and terminal node between the stable and reliable transmission;the terminal node software design mainly completes the ad hoc routing node,receives sensor data and send data to the coordinator,the coordinator receives the command and control function node action.After debugging,realize the stable operation of the wireless node system,environment information and environment information collected is basically the same,and can send commands to control electromagnetic valve switch action,can be collected in the field,"four" information and agricultural infornation.