You're reading from Practical Node-RED Programming Learn powerful visual programming techniques and best practices for the web and IoT

Product type Paperback

Published in Mar 2021

Publisher Packt

ISBN-13 9781800201590

Length 326 pages

Edition 1st Edition

Languages

JavaScript

Tools

Node-Red

Concepts

Server Side Web Development

Author (1):

Taiji Hagino

View More author details

Table of Contents (19) Chapters

Preface

1. Section 1: Node-RED Basics

2. Chapter 1: Introducing Node-RED and Flow-Based Programming FREE CHAPTER

3. Chapter 2: Setting Up the Development Environment

4. Chapter 3: Understanding Node-RED Characteristics by Creating Basic Flows

5. Chapter 4: Learning the Major Nodes

6. Section 2: Mastering Node-RED

7. Chapter 5: Implementing Node-RED Locally

8. Chapter 6: Implementing Node-RED in the Cloud

9. Chapter 7: Calling a Web API from Node-RED

10. Chapter 8: Using the Project Feature with Git

11. Section 3: Practical Matters

12. Chapter 9: Creating a ToDo Application with Node-RED

13. Chapter 10: Handling Sensor Data on the Raspberry Pi

14. Chapter 11: Visualize Data by Creating a Server-Side Application in the IBM Cloud

15. Chapter 12: Developing a Chatbot Application Using Slack and IBM Watson

16. Chapter 13: Creating and Publishing Your Own Node on the Node-RED Library

17. Other Books You May Enjoy

Appendix: Node-RED User Community

Learning the MQTT protocol and using an MQTT node

Now that the sensor data has been successfully acquired, let's send that data to the server.

We usually select a protocol suitable for the content being transmitted; for example, when exchanging mail, we use SMTP. Currently, HTTP is used as a general-purpose protocol on the internet.

For example, HTTP is used for various communications on the internet, such as displaying web pages in a browser and exchanging data between servers. HTTP is a protocol created for exchanging content on the internet. In many cases, network devices such as routers and firewalls on the internet are set to allow HTTP communication to be used for various purposes, and HTTP is compatible with the internet.

In the IoT world, MQTT is often used as a general protocol instead of HTTP. This means that the MQTT protocol is the standard of the IoT world, just as the HTTP protocol is the standard of the web world.

MQTT (short for MQ Telemetry Transport...