使用Node.js编程嵌入式系统

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"《Node.js for Embedded Systems》是Patrick Mulder和Kelsey Breseman合著的一本指南，专门探讨如何使用JavaScript和Node.js在互联网的数字世界与我们周围的模拟世界之间建立桥梁。本书旨在教硬件和软件工程师、制造商以及web开发者如何用JavaScript与各种硬件平台进行通信，包括微控制器、单板计算机等。书中涵盖了从Arduino和Espruino编程微控制器，到使用Tessel 2开发物联网设备，再到通过Particle Photon工具链将微控制器连接到互联网，以及在Raspberry Pi和Intel Edison等单板计算机上运行Node.js等多个主题。此外，还讨论了使用蓝牙远程控制设备、MQTT作为消息代理连接网络设备、构建机器人以及物联网早期硬件等多个方面。" 这本书详细介绍了以下关键知识点： 1. **JavaScript与微控制器**：讲解如何使用JavaScript语言来编程微控制器，如Arduino和Espruino，这使得Web开发者也能参与到硬件开发中。 2. **物联网(IoT)原型设计**：通过Tessel 2开发平台学习物联网设备的快速原型设计，提供了一种灵活且易于使用的硬件接口。 3. **Particle Photon**：介绍如何使用Particle Photon工具链，使微控制器能够连接到互联网，实现物联网功能。 4. **单板计算机与Node.js**：阐述在Raspberry Pi和Intel Edison等单板计算机上运行Node.js的方法，扩展了JavaScript的应用范围。 5. **硬件组件**：深入电子输入和输出组件，如传感器，帮助读者理解硬件与软件之间的交互。 6. **Node.js库与硬件通信**：探讨使用Johnny-Five等Node.js库与嵌入式设备进行通信，以及如何通过蓝牙远程控制设备。 7. **网络协议**：研究不同网络协议，如MQTT，它们在连接跨网络设备中的作用，为构建分布式系统提供支持。 8. **Web前端与物联网**：讨论如何为物联网设备创建Web前端界面，增强用户交互体验。 9. **云端集成**：介绍将设备连接到云端服务的方法，如云存储和数据分析。 10. **机器人编程**：阐述使用Node.js制作机器人的技术，将机器人作为共享体验的构建模块。 11. **无线数据传输**：探讨蓝牙在无线数据传输中的应用，实现设备间的无线通信。 12. **物理互联网与产品转型**：展望物理互联网的未来，并讨论从单一产品转向整体工具包的转变。书中的附录涵盖了Node.js的基本概念和早期物联网系统的硬件知识，为读者提供了全面的参考资料。《Node.js for Embedded Systems》是一本实践性强、内容丰富的指南，适合希望利用JavaScript和Node.js进行嵌入式系统开发和物联网应用设计的工程师、爱好者和创新者。通过本书，读者将学会如何利用Web技术构建连接的设备，从而将数字世界与现实世界紧密融合。

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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