WiFi技术的功耗和定位问题是阻碍其在无线网络传感器中应用的核心问题.以集成了WiFi功能和ARM7内核的SoC芯片GS1010为核心,设计了一款超低功耗温湿度网络传感器,使用SHT15温湿度传感器对温湿度数据进行长期监测.软件系统在μC/OS-Ⅱ嵌入式实时操作系统下,实现了基于睡眠/唤醒机制的低能耗管理、基于SNMP协议的网络管理、基于RSSI的无线定位,以及传感器数据采集和无线传输.测试结果表明传感器工作稳定,达到低功耗温湿度监测和无线定位的要求.%High loss power and wireless location of WiFi are two core issues that hinders its application in a wireless network sensor. An ultra-low power temperature and humidity network sensor is designed for long-term monitoring of temperature and humidity data, which uses WiFi and ARM7 core integrated SoC chip GS1010 and SHT15 temperature and humidity sensor. Based on μC/OS-II embedded real-time operating system, the software realizes low-power management based on sleep-wake mechanism, SNMP-based network management, wireless RSSI-based location, and sensor data acquisition and wireless transmission. The test results show that the sensor is stable and reliable, and meets the requirements of low-power temperature and humidity monitoring and wireless location.
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