August 2017
Intermediate to advanced
272 pages
5h 32m
Chinese
Content preview from Node.js物聯網裝置開發
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第十四章 體感網路之道
體感網路帶來的衝擊
讓萬事萬物連上網路，將會如何改變我們的工作型態與創作方式呢？想要製作出有效率
的系統，取決於兩種特性：關於系統的知識、以及改變調整系統的能力。機器人是種裝
有感測器與致動器的裝置，算是非常棒的學習工具，讓我們能從簡單入門，逐步到大型
系統的課程。
某地區若有更密集的
感測器
，代表著在提供專屬於該地區的資訊時，精確度更高、更
為詳盡，讓我們可取得較佳的資訊，即時製作出更為完整的地圖。若是
致動器
的密度
更高，則可擁有更好的回應能力，更為精準。結合上述兩者，若網路中含有許許多多感
測與致動裝置，便能夠讓我們收集資訊，分析後立即在多個地方同時做出動作，把資料
儲存在網際網路上。隨時都能存取，更是一大利多，深入了解系統與影響層面，這麼
一來，我們就能加以最佳化與改進，此外，也可從系統外部來了解、洞見整個系統的
行為。
舉例而言，請想像農作物的田地，目前現狀是在一大片面積裡，標準化灌溉的程序，通
常並不會對系統裡的某個區域做特別考量。但如今不同了，請想想若整片田地平均佈滿
了上百個土壤濕度感測器，不斷地回報濕度資訊，在地圖上呈現，告訴你哪個區域可能
水份過多、哪處可能過少，收集足夠多的資料並進行分析後，我們與農民就能夠知道，
如何因應四季的變化，對這塊土地進行適當的灌溉程序。
現在請想像一下，四散各處的機器人身上，不僅有感測器，也有灑水裝置，除了回報資
訊給農民，這些機器人（裝載著致動器）也能根據設定的參數，即時即地控管灑水程
序。這麼一來，就能更有效率地生產作物，減少勞動奔波之苦。 ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.