基于CC2530的无线传感器网络网关节点的设计

Design of CC2530 based gateway node for wireless sensor network

【目的】针对现有农业环境监测网关设备开发成本高、系统功耗大、操作复杂等不足,设计开发一种用于农业环境监测的无线传感器网络网关节点。【方法】网关节点以低功耗芯片CC2530为核心处理单元,通过外围状态指示电路、电源管理模块等,完成ZigBee网络组网和监测节点数据收集及处理功能;同时通过串口方式连接SIM900A模块,采用GPRS方式将监测数据上传至中心服务器。最后在农田进行了监测数据误包率与信号接收强度测试,并通过实地部署试验验证了系统的稳定性及可靠性。【结果】所设计的网关节点能实现4种农业环境数据的采集,节点间距小于120m时数据传输误包率低于1%,监测数据在30d农田试验期内连续变化,可长时间上传至服务器,且稳定性、可靠性良好。【结论】所设计开发的基于CC2530的网关节点具有丢包率低、运行稳定可靠的特点,能够满足多种农田环境因子的监测需求,具有良好的应用前景。

[Objective] Aiming to solve the disadvantages of existing agricultural environment monitor gateways,such as high-cost, high power consumption and complex operation, a wireless senor network gateway node for environment monitoring was designed. [Method] The low-power CC2530 module was used as the core processing unit to build and organize the ZigBee network,and collect and process the data through peripheral status indication circuits and power management module. Meanwhile, it connected with SIM900A module via serial port, and uploaded data to central server through GPRS. Data of RSSI and packet error rate were tested and gateway node was deployed in farmland for verification of stability and reliability. [Result] The gateway node achieved the data collection for four agricultural environments with the packet error rate of 〈1% within 120 meters. Monitoring data varied and were continuously uploaded to server for 30-day with good stability and reliability. [Conclusion] The designed CC2530 based gateway node functioned well with low packet error rate and met monitoring needs of various agricultural environments with good prospect.