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

Creating a Slack workspace

This hands-on tutorial uses Slack as the UI for your chatbot application. Node-RED is responsible for controlling the exchange of messages in the background of the chatbot application.

The overall view of this chatbot application is as follows:

Figure 12.1 – Application overview

First of all, create a Slack workspace for use in this application with the following steps. If you already have a Slack workspace, you can use your existing one. In that case, skip the following steps and create a channel called learning-node-red in your workspace:

  1. Access, enter your email address, and click the Next button:

    Figure 12.2 – Enter your email address

  2. Check the six-digit verification code from the email you received from Slack:

    Figure 12.3 – Check the six-digit code

  3. Enter the verification code in the window that is displayed after you click Next with your email address. After entering...