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一种基于STM32微控制器的低功耗LoRa感知系统设计

来源：电工电气发布时间：2022-06-21 13:21 浏览次数：404

一种基于STM32微控制器的低功耗LoRa感知系统设计

方乡，陈仲生，李文豪

(湖南工业大学电气与信息工程学院，湖南株洲 412007)

摘要：无线传感器节点由于部署环境而受到严峻的供电限制，这促使其通过低功耗技术来延长使用年限。以温湿度、振动为监测对象，提出了一种能量管理与动态电压调节方法，从软件与硬件上同时降低电流的损耗，系统微控制器采用低功耗芯片 STM32L475VET6 及低功耗局域网 LoRa 技术实现远距离通信，主控制器多种模式唤醒工作，系统长周期保持睡眠模式，通过实验测量监测节点在空闲待机模式下仅消耗 21.85 μA。解决了不稳定监测与长周期监测节点的问题，对于物联网监测具有实际的应用价值。

关键词： 低功耗；LoRa 技术；MCU ；传感器

中图分类号：TN92 ；TP212 文献标识码：A 文章编号：1007-3175(2022)06-0014-05

Design of a Low-Power LoRa Sensing System Based on STM32 MCU

FANG Xiang, CHEN Zhong-sheng, LI Wen-hao

（College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China）

Abstract: There is a power supply limitation of wireless sensor nodes due to the deployment environment, which means it has to extend the service life by using low-power technology. This paper monitored the temperature, humidity, and vibration and proposed a method to help reduce the current loss from both hardware and software aspects. The system microcontroller used the low-power chip of STM32L475VET6 and the LoRa technology of the low-power LAN network to realize long-distance communication. The master controller had various wake-up modes, and the system kept sleep mode for a long period. The experiment result shows the microcontroller of the node system consumed 21.85 μA in standby mode. It solves the problem of instability monitoring and long-period monitoring nodes and has practical application value for the Internet of Things monitoring.

Key words: low-power; LoRa technology; MCU; sensor

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一种基于STM32微控制器的低功耗LoRa感知系统设计