Book Image

Practical Node-RED Programming

By : Taiji Hagino
5 (1)
Book Image

Practical Node-RED Programming

5 (1)
By: Taiji Hagino

Overview of this book

Node-RED is a free and open source flow-based programming tool used to handle IoT data that allows programmers of any level to interconnect physical I/O, cloud-based systems, databases, and APIs to build web applications without code. Practical Node-RED Programming is a comprehensive introduction for anyone looking to get up to speed with the Node-RED ecosystem in no time. Complete with hands-on tutorials, projects, and self-assessment questions, this easy-to-follow guide will help you to become well versed in the foundations of Node-RED. You’ll learn how to use Node-RED to handle IoT data and build web applications without having to write complex code. Once you’ve covered the basics, you’ll explore various visual programming techniques and find out how to make sample flows as you cover web development, IoT development, and cloud service connections, and finally build useful real-world applications. By the end of this book, you’ll have learned how to use Node-RED to develop a real-world application from scratch, which can then be implemented in your business.
Table of Contents (19 chapters)
Section 1: Node-RED Basics
Section 2: Mastering Node-RED
Section 3: Practical Matters

Installing npm and Node.js for Raspberry Pi

If you want to use Node-RED on Raspberry Pi, congratulations – you are already prepared to install Node-RED. This is because Node.js and npm are installed by default. You can use the existing installation script to install Node-RED, including Node.js and npm. This script will be described later in this chapter, in the Installing Node-RED for Raspberry Pi section, so you can skip this operation for now.

However, you should check your Node.js and npm versions on your Raspberry Pi. Please type in the following commands:

$ node --version
$ npm –version

If it is not the LTS version or stable version, you can update it via the CLI. Please type in and run the following commands to do this. In this command, on the last line, lts has been used, but you can also put stable instead of lts if you want to install the stable version:

$ sudo apt-get update
$ sudo apt-get install -y nodejs npm
$ sudo npm install...