近幾年社會非常重視環境汙染的議題，傳統的水質監測模式為人工定時定點收集水體後送至實驗室分析水質，這樣的方式耗時且耗費人力，隨著科技的演進，我們可以藉由物聯網來改善水質監測耗時耗力的缺點。

本論文依照物聯網三階層設計即時水質監測系統，感知層布建水質感測器，監測項目為水溫、pH值、溶氧量、導電度，其中網路層(Network Layer)則選用最新的低功率廣域網路(Low-Power Wide-Area Network；LPWAN)-LoRaWAN來實作即時水質監測系統(Real-time Water Quality Monitoring)，可同時達成傳輸成本低、傳輸距離長、耗電量低等需求，最終應用層則是將數據以圖表的形式即時顯示在網頁上，更直覺的了解即時水質情況。

In recent years, the society has attached great importance to the issue of environmental pollution. The traditional monitoring mode of water quality requires water body of manually, periodically and fixed-located data collected and sent to the laboratory for the analysis of water quality. This method is very time-consuming and costs lots of human resources. With the evolution of technology, we can use the Internet of Things (IoT) to improve the shortcomings of water quality monitoring.

The thesis designs an instant water quality monitoring system based on the three layers of the IoT. The perception layer sets up water quality sensor in which the monitored items are water temperature, pH, dissolved oxygen and conductivity. The network layer uses the latest Low-Power Wide-Area Network (LPWAN), LoRaWAN, which can simultaneously achieve low transmission cost, long transmission distance, low power consumption, etc, to implement Real-time Water Quality Monitoring. The application layer is made to display the data on the webpage in the form of a gauge which learns more intuitively the real-time water quality.

第一章 緒論 1
1.1研究背景 1
1.2 研究動機 3
1.3 論文架構 4
第二章 背景知識 5
2.1物聯網架構 5
2.2 水質監測項目 8
2.3 水質感測器 14
2.4 LoRaWAN通訊協議與系統架構 18
2.5 軟硬體開發工具 20
2.5.1 Arduino 微處理器選用及介紹 20
2.5.2資料庫選用及建置 24
2.5.3監測網頁建置 25
第三章 系統建構 27
3.1 系統架構與流程 27
3.2系統電路 33
第四章 系統測試 37
4.1 系統測試環境 37
4.2 系統測試結果 38
第五章 結論與未來展望 43
5.1結論 43
5.2未來展望 43
參考文獻 44

[1]Yan-Ting Liu, et al.”A solor powered long range real-time water quality monitoring system by LoRaWAN”, 2018 27th Wireless and Optical Communication Conference (WOCC), Hualien, Taiwan, 30 April-1 May 2018.

[2]Yang Xu, Fugui Liu,“Application of Wireless Sensor Network in Water Quality Monitoring”, 2017 IEEE International Conference on Computational Science and Engineering (CSE) and IEEE International Conference on Embedded and Ubiquitous Computing (EUC), 21-24 July 2017.

[3]Brinda Das, P.C. Jain,“Real-Time Water Quality Monitoring System using Internet of Things”, 2017 International Conference on Computer, Communications and Electronics (Comptelix), 1-2 July 2017.

[4]LoRa Alliance Technical Marketing Workgroup, ”A technical overview of LoRa and LoRaWAN,” Novermber 2015.

[5]Interoperation among IoT Standard, https://www.riverpublishers.com/journal/journal_articles/RP_Journal_2245-800X_129.pdf

[6]pH感測器說明書,
https://www.atlas-scientific.com/_files/_datasheets/_circuit/pH_EZO_Datasheet.pdf

[7]E.C.感測器說明書,
https://www.atlas-scientific.com/_files/_datasheets/_circuit/EC_EZO_Datasheet.pdf

[8]DO感測器說明書,
https://www.atlas-scientific.com/_files/_datasheets/_circuit/DO_EZO_Datasheet.pdf

[9]行政院環境保護署全國環境水質監測資訊網相關詞彙及定義, https://wq.epa.gov.tw/Code/Business/Vocabulary.aspx

[10]黃琬玲.(2013)國立東華大學左岸電子報, http://faculty.ndhu.edu.tw/~LCenews/e_paper/e_paper_c.php?SID=484

[11]淡水悠活學習網,
http://www.whcc.org.tw/yoho/chinese/page2/2-data2/2-data2-5.html

[12]中華民國雪霸國家公園官方網頁,
https://www.spnp.gov.tw/old/Article.aspx?a=Ih2zJkTgJCE%3D&lang=1