Internet of things programming with JavaScript

學會使用ESP32開發無線物聯網專題所需的各種開發知識 使用ESP32開發板來開發各種物聯網專案可完整涵蓋感測器到雲端平台之間的安全資料通訊技術，有助於您使用EPS32系統單晶片來開發各種產品級的物聯網解決方案。您將學會如何使用各種類型的序列通訊協定來介接不同的感測器與致動器，藉此將ESP32應用於物聯網(Internet of Things, IoT)專案中。 本書會說明為何某些專案需要對終端使用者的立即性輸出，也會透過範例來驅動各種顯示模組來介紹不同的顯示技術。本書特色在於透過專門章節搭配實作範例來說明數位安全性。在學習過程中，您會理解藍牙低功耗(BLE)與BLE網格網路，並製作一個完整的智慧家庭專案，其中的所有節點都可透過 BLE網格網路來通訊。後續章節則示範為何物聯網應用大多時候都會需要雲端連線能力以及允許智慧型裝置的遠端存取。您也會知道整合各款雲端平台與第三方服務如何能為終端使用者開啟了無限的可能性，例如大數據分析以及預防性維修好將成本最小化。 本書告訴你使用ESP32開發無線物聯網專題所需的各種開發技能，並製作直擊核心且高效率的安全性方案來滿足專題需求。 本書精彩內容： ．探索進階使用情境，例如UART通訊、聲音與相機功能、低功耗情境以及透過RTOS進行排程 ．在專案中整合不同類型的顯示模組來滿足對使用者的立即性輸出 ．連接Wi-Fi與藍牙進行本地端網路通訊 ．透過不同的物聯網訊息通訊協定來連接各種雲端平台 ．將ESP32整合語音助理與IFTTT等第三方服務 ．探索用於實作產品等級之物聯網安全功能的各種最佳方式

★ 專業獸醫解析＋超萌圖解，讀懂每一個細微動作★ 從奇怪習慣到情緒表達，全面掌握貓咪心理★ 養貓新手到資深貓奴都必備的行為指南為什麼牠總愛坐在你的鍵盤上？為什麼半夜踩你臉？還偏偏愛喝水龍頭的水？本書帶你走進貓咪神祕又迷人的世界。從尾巴擺動、耳朵角度到日常行為，每一個看似「莫名其妙」的舉動，其實都藏著訊號。透過專業獸醫的深入解析與生動圖像，你將逐步解讀貓咪的情緒與需求，理解牠如何看待你與這個家。當你開始「聽懂」貓的語言，關係也將悄然改變——你不再只是飼主，而是牠真正信任的夥伴。Unlock the secret code of cats for a deeper connection with the feline in your life. Why does my cat always want to sleep on my computer keyboard? How can I keep her from bullying the dog? This used to be her favorite food, but now she won't touch it Why will she only drink from the bathroom faucet? Does she actually like me? If you've ever wondered, as she sits on your head at 4am, what on earth is going on beyond your cat's inscrutable gaze, this book has the answers. Drawing on extensive animal behavior psychology and the latest research, it reveals what's really behind those things cats do--whether they're amusing, irritating, or just downright bizarre. Cats may not telegraph their emotions (unlike the dogs they look down on), but they do show th

本書探討了企業組織、企業家、開發人員和律師應如何將他們的業務與區塊鏈(Blockchain, BC)、人工智能(Artificial Intelligence, AI)和物聯網(Internet of Things, IoT)這三種新興技術整合起來。本書全面解析了實現這些技術所需的關鍵資源，包括商業、技術和法律三大領域，幫助企業組織在即將到來的時代中充分利用這些日益重要的技術。本書主要關注區塊鏈。區塊鏈是這三者中最重要的組成部分，因為它是所有解決方案的後端基礎。它是數據的持久層，被視為“真相層”。而物聯網和人工智能則為用戶的前端請求提供便利，同時提供經過訓練的機器智能。此外，區塊鏈開發工具在過去幾年已經成熟，而開發者想知道這些工具是如何工作的。本書介紹並提供了一些可以部署在以太坊鏈上的完整應用程序(包括代碼和所有相關內容)。也就是說，本書首先討論每一種技術，並提供介紹性材料，為讀者提供正在培養和開發這種“三合體的力量”實施標準的參與者(例如，穀歌、以太坊、IBM、微軟、亞馬遜等)的詳細信息。本書不僅會討論技術方面的要求，還會討論新興法規、安全和隱私法對商業與法律合規性的要求。本書將引導讀者完成創建示例應用程序和代碼所需的步驟，這將促進、支持和加速讀者實施這些新技術的過程。本書還將探索集成這些技術組合的應用程序的新用例，最重要的是著眼於這些技術將如何使用“三合體的力量”來改變軟件開發的方式。 本書的目標讀者包括任何對新興技術感興趣的人，以及任何設計、開發甚至思考如何使用這些新興技術來創造價值的人。此外，各級別的網絡和應用程序開發人員，精通技術的商人，以及需要緊跟技術發展動態、瞭解使用這些技術所帶來的道德考量、用例和構建技術內容所需的解決方案的律師，也都是本書的受眾。

◎米亞有記憶以來，幾乎所有令她記憶深刻的精彩歡樂時光好像都有妹妹艾瑪在場。◎現今16歲的米亞決定將與艾瑪最美好的童年記錄成一篇篇故事，並成為一本紀念冊。◎沒有人生勵志與格言，其實我們需要的，就是那麼一點簡單的童心。《米亞與艾瑪》講述了一對相差兩歲的姐妹溫馨又好笑的日常。姐姐米亞性格成熟内斂，是一個心底藏著許多事情的大姐姐。米亞最喜歡穿小花裙子以及任何帶有亮片的東西。妹妹艾瑪古靈精怪，年紀雖然不大但總是有著許多奇奇怪怪的點子，一顆小腦袋裡不知道裝了多少古怪的想法，你永遠都猜不到她到底在想些什麽！就是這樣一對從頭到脚一點也不一樣的姐妹，讓平凡的生活充滿了歡樂的色彩！她們吵架，和好，一起冒險，又常常一起做出一些讓媽媽頭大的事情，但這不妨礙她們始終是彼此最好的朋友。翻開這本書來跟米亞和艾瑪一起度過一個快樂的童年吧！“Mia and Emma” is a collection of stories of Mia who is the older sister, and Emma who is the younger.Mia is quiet and thoughtful, and prefers dresses with flowers on them, and anything and everything sparkly. While Emma is mom and dad’s biggest headache. Emma has the weirdest ideas and the most bizarre thoughts; you can never guess what Emma is up to next! Just like that, two very different sisters.They fight, make up, go on adventures together, and do silly things that give mum headaches. But no matter what, Mia and Emma remain each other’s forever best friend.◎代理經銷：白象文化更多精彩內容請見http://www.pressstore.com.tw/freereading/9786267189115.

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