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

Preparing a public MQTT broker service

Recall the previous chapter, Chapter 10, Handling Sensor Data on the Raspberry Pi. We sent the data of the temperature/humidity sensor, which was connected to the edge device (Raspberry Pi), to the cloud and confirmed that the data could be observed on the cloud side.

In the previous chapter, we checked how to operate an MQTT broker using a service called Mosquitto. This was in order to focus on sending data from edge devices to an MQTT broker.

However, this was a mechanism where everything was done locally on the Raspberry Pi. Essentially, when trying to implement an IoT mechanism, MQTT brokers should be in a public location and accessible from anywhere via the internet.

It is possible to host your own Mosquitto MQTT broker in the public cloud, but that adds some extra complexity in terms of setting up and maintaining it. There are a number of public MQTT services available that can make it easier to get started.

In this chapter...