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

Using IoT on edge devices

Now let's consider a case study on edge devices in IoT.

IoT has recently been adopted in several industries, for example, in the fields of weather forecasting and agriculture; however, the basic composition is the same. Various data acquired by the edge device is sent to the server-side platform, such as the cloud, and the data is handled and visualized on the server side, which is full of resources. There are various ways to visualize, but in the simplest case, it will be to output the necessary data values to the log as a standard output.

In this chapter, I would like to consider the edge device part in the use case of IoT. This is about handling the sensor data, acquired using the sensor module, before it goes to the server side for formatting and narrowing down.

What are the different kinds of sensors?

The following sensors are often used at the experimental level of IoT:

  • Temperature
  • Humidity
  • Gyroscope (acceleration, angular...