基于智能手机的LoRa无线传输效能测试研究

Study on smartphone-based performance test of LoRa wireless transmission

基于LoRa的低功耗广域网技术有望成为未来物联网的主干支撑技术之一。为了给工作在不同应用环境中的LoRa无线传感器网络节点间的传输提供简单有效、易于使用、成本低廉的测试手段,提出一种基于智能手机的LoRa无线传输效能测试系统。该系统由智能手机及与之配套的低成本测试节点组成。对组成系统的智能手机端App及测试节点设计进行讨论,系统完成后利用其在智能楼宇与智慧农业的应用场景下进行测试。测试结果表明,LoRa无线传输在不同的应用环境中会受到外界因素的干扰,通过本系统可方便、有效、快捷地获得分散在较长时间周期内的数据,为基于LoRa的无线传感器网络在设计、安装与维护中提供以数据传输效果为表征的参考测试数据。

The low-power wide area network(LPWAN)technology based on LoRa(long range)technology will become one of the main supporting technologies of future Internet of Things(IoT).A smartphone-based performance test system of LoRa wireless transmission is proposed to provide a simple,efficient,wieldy and inexpensive test method for the transmission between nodes of LoRa WSN in different application environments.The system is composed of smartphone and inexpensive test node matched with the smartphone.The design of the App in smartphone and test node of the system is discussed in this paper.The system was tested in its application scenarios of intelligent building and intelligent agriculture.The test results show that the LoRa wireless transmission can be disturbed by external factors in different application environments,the system can acquire the data dispersed within a long period of time conveniently,efficiently and quickly,and provides the reference test data representing the data transmission effect for design,installation and maintenance of wireless sensor network based on LoRa.