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

Building a chatbot application

So far, you've created a chatbot engine in Watson Assistant, created a Slack workspace, and integrated the Bot app, which you can use in that Slack workspace.

Here, we will combine these services with Node-RED and create a mechanism with Node-RED so that the bot will answer when talking in Slack's workspace.

Follow these steps to create a flow:

  1. Connect Watson Assistant to Node-RED. Access your Node-RED service dashboard via Resource list on IBM Cloud. Select the Connections tab and click the Create connection button:

    Figure 12.33 – Create a new connection on Node-RED

  2. Select the Watson Assistant service you created and click the Next button:

    Figure 12.34 – Create a new connection on Node-RED

  3. Click the Connect button with the default options to finish the connection setup. Doing this operation will restart the Node-RED application, which will take a few minutes to complete:

    Figure 12.35 – Finish creating...