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面向環境監測的LoRa自組網網關設計

來源：電工電氣發布時間：2023-04-26 09:26 瀏覽次數：273

面向環境監測的LoRa自組網網關設計

李文豪，陳仲生，方鄉

(湖南工業大學電氣與信息工程學院，湖南株洲 412007)

摘要：在環境監測過程中要求傳感器和數據傳輸設備能夠長時間的穩定工作，提出了一種面向環境監測的 LoRa 自組網網關的設計。節點子設備和網關基于 STM32 芯片進行開發，節點數據傳輸設備和網關接收設備采用 LoRa 模塊，網關的 LoRa 接入模塊通過自組網可實現接收多個 LoRa 節點數據的功能；節點傳感器采用 AHT10 溫濕度傳感器和 BH1750 光照度傳感器進行實時數據采集，每個節點板還內置三個 ADC 電壓采樣電路，可以準確檢測 LoRa 模塊及各個傳感器模塊的工作電壓是否穩定；網關通過 ESP8266 模塊可以連接 WiFi，以此來建立與服務器的數據通信，同時采用 MQTT 協議可將各節點子設備的數據發布至服務器進行可視化顯示，有利于用戶對節點數據的實時監控和管理。LoRa 自組網私有協議大大提高了網關的實用性、穩定性和可靠性，實驗驗證了該網關能夠滿足在工業、農業以及其他環境下的監測需求。

關鍵詞： 環境監測；LoRa 傳輸；自組網；網關；傳感器

中圖分類號：TM73 ；TP212.9 文獻標識碼：A 文章編號：1007-3175(2023)04-0053-07

Design of LoRa Ad-Hoc Network Gateway for Environmental Monitoring

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

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

Abstract: In the process of environmental monitoring, sensors and data transmission equipments have to work steadily for a long time, so the design of LoRa ad-hoc network gateway for environmental monitoring is put forward. According to the design, node sub-equipments and the gateway are developed based on STM32 chip, node data transmission equipments and gateway receiving equipments adopt LoRa module,and LoRa access module of gateway can receive data of multiple LoRa nodes through ad-hoc network. Node sensors use AHT10 temperature and humidity sensors and BH1750 light intensity sensors for real-time data collection. Each node board is also equipped with three ADC voltage sampling circuits inside to accurately detect the working voltage stability of the LoRa module and every sensor module. The gateway can connect WiFi through ESP8266 module to make data communication with the server. At the same time, MQTT protocol can be used to publish the data of node sub-equipments to the server for visual display, which is helpful for users to monitor and manage node data in real time. The private protocol of LoRa ad hoc network can greatly improve the practicability, stability and reliability of the gateway, and experiments have verified that this gateway can meet the monitoring requirements for industrial, agricultural and other environmental conditions.

Key words: environmental monitoring; LoRa transmission; ad-hoc network; gateway; sensor

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