为了实现传感器节点之间无线通信并组网,开发了一种将各多总线器件集成到一起进行无线温、湿度测量的网络系统。系统各节点主要包括由SPI总线控制的无线射频器件QRF-0400,I2C总线控制的硬时钟器件PCF8563,以及单总线控制的温、湿度传感器等。节点通过无线射频器件将传感器采集的温、湿度实时传递到监控主机,工作结束自动进入睡眠模式以降低节点功率,延长工作寿命。实验表明,节点在80m范围内自动组网并采集周边环境的温、湿度,误差低于0.01°。 Abstract: A multi-bus system integrated into a wireless sensor network node was applied with the measurement of temperature and humidity for achieve wireless communication between sensor nodes and networking effectively. Each node included RF chip QRF-0400 controlled by SPI bus,hardware clock chip controlled by I2C bus,as well as temperature and humidity sensors by 1-Wire bus. The temperature and humidity were monitored by the senor,and transmitted to the host by RF chip in nodes. The node entered sleep mode automatically after the end of the working, and it reduced the node power extended its working life. Experimental data indicate that the node networking automatically and measure the surrounding environment temperature, humidity in the 80m range, and the error is less than 0.01°.
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