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为了实现热带花卉环境参数实时监测,文中设计了一种以MSP430F149为核心的无线温湿度传感器节点。节点通过传感器AM2306采集温湿度数据、n RF905射频芯片无线发送数据、MAX3232芯片将数据发送至PC机、LT1129-3.3和LT1129-5组成的电路提供3.3 V和5 V电源,节点软件以IAR Embedded Workbench为开发环境,采用单片机C语言开发。节点具有体积小、功耗低、测量准确的特点,测试表明,节点平均工作电流约为0.78 m A,温度和湿度的最大相对误差分别为5.78%和1.37%,可以满足热带花卉数据采集的应用要求。
In order to achieve real-time monitoring of environmental parameters of tropical flowers, a wireless temperature and humidity sensor node with MSP430F149 as its core is designed in this paper. Node through the sensor AM2306 temperature and humidity data acquisition, n RF905 RF chip sends data wirelessly, MAX3232 chip sends the data to the PC, LT1129-3.3 and LT1129-5 circuit provides 3.3 V and 5 V power supply, the node software to IAR Embedded Workbench For the development environment, using SCM C language development. The test results show that the average operating current of the node is about 0.78 m A, and the maximum relative errors of temperature and humidity are 5.78% and 1.37% respectively, which can meet the needs of tropical flower data acquisition Claim.