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一種基于STM32微控制器的低功耗LoRa感知系統設計

來源：電工電氣發布時間：2022-06-21 13:21 瀏覽次數：724

一種基于STM32微控制器的低功耗LoRa感知系統設計

方鄉，陳仲生，李文豪

(湖南工業大學電氣與信息工程學院，湖南株洲 412007)

摘要：無線傳感器節點由于部署環境而受到嚴峻的供電限制，這促使其通過低功耗技術來延長使用年限。以溫濕度、振動為監測對象，提出了一種能量管理與動態電壓調節方法，從軟件與硬件上同時降低電流的損耗，系統微控制器采用低功耗芯片 STM32L475VET6 及低功耗局域網 LoRa 技術實現遠距離通信，主控制器多種模式喚醒工作，系統長周期保持睡眠模式，通過實驗測量監測節點在空閑待機模式下僅消耗 21.85 μA。解決了不穩定監測與長周期監測節點的問題，對于物聯網監測具有實際的應用價值。

關鍵詞： 低功耗；LoRa 技術；MCU ；傳感器

中圖分類號：TN92 ；TP212 文獻標識碼：A 文章編號：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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一種基于STM32微控制器的低功耗LoRa感知系統設計