使用Node.js构建物联网设备接口

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“Node.js for Embedded Systems” 是一本由Patrick Mulder和Kelsey Breseman合著的书籍，出版于O'Reilly Media，2016年。这本书关注的是如何利用JavaScript和Node.js来连接数字世界（互联网）与我们身边的模拟世界（硬件设备），尤其是在嵌入式系统中的应用。书中向硬件工程师、软件工程师、创客和web开发者介绍了如何用JavaScript与各种硬件平台进行交互，并探讨了微控制器、单板计算机等硬件组件的基础知识。书中的主要内容包括： 1. **使用JavaScript编程微控制器**：通过介绍如何使用Arduino和Espruino这样的平台，读者可以学习到如何用JavaScript编写微控制器程序。 2. **物联网(IoT)设备原型设计**：作者讨论了如何使用Tessel 2开发平台快速原型物联网设备，让开发者能够快速实现概念验证。 3. **电子输入和输出组件**：书中涵盖了传感器等电子输入和输出组件的工作原理和应用，帮助读者理解如何在硬件项目中使用这些组件。 4. **微控制器联网**：讲解如何使用Particle Photon工具链将微控制器连接到互联网，实现设备的远程控制和数据交换。 5. **运行Node.js在单板计算机上**：如Raspberry Pi和Intel Edison，让读者了解如何在这些平台上部署和运行Node.js应用程序。 6. **使用Node.js库与嵌入式设备通信**：通过Johnny-Five等库，可以使用JavaScript直接与嵌入式设备进行通信，甚至实现蓝牙远程控制。 7. **消息中间件MQTT**：介绍如何使用MQTT作为消息代理，连接分布在不同网络中的设备，构建分布式物联网系统。 8. **机器人技术的应用**：探讨将机器人作为构建共享体验的基础模块，扩展了物联网的潜在应用场景。这本书是为那些想要将Web技术应用于连接设备的开发人员准备的，无论他们是新手还是经验丰富的专业人士，都能从中受益。通过阅读本书，读者将能够掌握使用Node.js构建嵌入式系统和物联网设备的关键技能。

Chapter 4, e Tessel 2

Next, we’ll review how to get started with Tessel 2, a development platform for

prototyping Internet of Things devices.

Chapter 5, Particle Photon

In this chapter, we’ll investigate JavaScript toolchains for connecting a microcon‐

troller to the Internet. Our discussion will focus on the Particle Photon.

Chapter 6, Single-Board Computers

The Raspberry Pi is a popular choice for media-related use cases. This chapter

looks at different approaches to running Node.js on single-board computers.

Various boards will be covered, including the Intel Edison.

Chapter 7, Components for Prototyping

This chapter discusses simple electronic circuits. As outputs, LEDs often indicate

the state of a system. For inputs, different components, such as buttons and

potentiometers, are usually required. Sensors can capture physical data, and

you’ll learn some basics about them in this chapter.

Chapter 8, Node.js Libraries for Hardware

Now that you have a strong foundation in boards and components, we’ll move on

to look closer at working with Node.js libraries for embedded devices. This chap‐

ter explores some of the abstractions for hardware. Good examples for talking to

hardware with JavaScript can be found in the Johnny-Five library or serialport

library for serial communication with Node.js.

Chapter 9, Exploring Network Protocols

Node.js comes with support for a number of different network protocols. After

an overview of the Hypertext Transfer Protocol (HTTP), other network protocols

are presented. The WebSocket protocol, which is used to push messages over a

network, is particularly interesting.

Chapter 10, Web Frontends for

ings

Many hardware projects require a user interface (UI). With JavaScript, you can

easily build a UI in a web browser. For this, you’ll set up a project structure to

work with a static HTML page. Then we’ll add some JavaScript and SVG for

graphics.

Chapter 11, Entering the Cloud

This chapter takes a closer look at sending data with message brokers and

MQTT. With MQTT, you can subscribe to updates from sensor devices. In addi‐

tion, you get an overview of other cloud services for working with messages from

devices.

xiv | Preface

Acknowledgments

From Patrick

The first ideas for this book resulted from conversations with Denise Jacobs. While I

enjoyed working on my first book on building web applications with full-stack Java‐

Script, I unexpectedly was working with electronics and hardware again. Thanks to

Denise, I could find common ground from both worlds. Also, thanks to Denise for

submitting that O’Reilly SolidCon talk proposal!

SolidCon was helpful for this book in many ways. Thanks to Jon Bruner for organiz‐

ing the conference and setting the frame for this book at O’Reilly. SolidCon provided

a fantastic platform to discuss how machines can be built, printed, assembled, and

programmed. On a philosophical note, SolidCon gave me new ideas for how hard‐

ware evolves into a medium for digital expression.

The workshop and discussion with Michael McCool helped me to better structure the

material for this book—actually, the current structure of this book is strongly influ‐

enced by the workshop Michael gave at SolidCon about the Internet of Things. Also,

thanks to Rex St. John, Alexander Tereschenko, and Matthias Hahn for their feedback

on early versions of this book.

The book has benefited a lot from discussions I had with Kelsey Breseman from the

Tessel project. Thank you, Kelsey, for joining this project as coauthor! Your holistic

view on technology improved this book in many ways, and better prepares the reader

to tackle the challenges that development of IoT devices pose.

My shift from software to hardware (and back to software) was triggered by a con‐

sulting project in Munich. Special thanks to Thorsten Bucksch, who hired me for this

project. And thanks to Rainer Brunn, Philip Thurner, Willy Bristiel, and Ralph

Mueller-Eschenbach for helpful discussions about electronics.

Many interesting discussions about the Internet of Things happen in makerspaces.

Thanks to all friends and meetup members from the Munich Arduino meetup. The

mix of learning, teaching, and experimenting shows the power of peer-to-peer net‐

works. In particular, thanks to Thomas Schütt, Augusto Redolfi, Carlos Morras,

Rüdiger Freese, Horst Altmann, and Erhard Waretzi for answering “stupid” ques‐

tions. While I studied electronics many years ago, a lot of its fun came back with

exploring Arduino projects. Thanks to Massimo Banzi and his team for building

Arduino. And thanks to Dan Hienzsch for building the I2C Education shield.

As the JavaScript community for embedded systems is just evolving, thanks to Rick

Waldron for the work on many Node.js libraries that simplify working with embed‐

ded systems. Thanks to Ron Evans and Adrian Zankich for presenting Cylon.js at

xviii | Preface

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