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

IoT case study spot on the server side

Now, let's consider a server-side case study for IoT.

It does not depend on the case of each edge device. It primarily serves to process data and store it in a database for visualization.

In this chapter, we'll consider the use case of IoT; that is, assuming that the sensor data that's received using the sensor module is received on the server side, and the subsequent processing part.

The difference from the previous chapter is that in this server-side processing tutorial, the content of the data doesn't make much sense. The main purpose is to save the received data and visualize it as needed, so I would like to define the following two use cases.

Use case 1 – Storing data

The first case is to store data. Let's create an application (flow) that stores data you receive from devices. In this section, we don't use real data from devices; we just use the data generated by the inject node instead...