Book Image

Arduino Data Communications

By : Robert Thas John
5 (1)
Book Image

Arduino Data Communications

5 (1)
By: Robert Thas John

Overview of this book

In our modern, internet-connected world, where billions of devices constantly collect and send data to systems to be stored and processed, it’s surprising how the intricacies of data transmission and storage are often overlooked in the IoT domain. With Arduino Data Communications, you'll bridge the knowledge gap and become an expert in collecting data from IoT sensors, transmitting data, and configuring your own databases. This book is an exploration of IoT’s inner workings, guiding you through the process of setting up an end-to-end system that you can employ to prototype your own IoT solutions, using easy-to-follow examples. It begins with a general overview of the Arduino ecosystem, acquainting you with various sensors and shields and unveiling the art of data collection. You’ll then explore data formats and methods to store data, both locally and on database servers. As you progress through the chapters, you’ll learn how to set up REST and MQTT infrastructure to communicate with databases and get hands-on with LoRaWAN, Ethernet, cellular, HC-12, and RS-485. The final chapters are your training ground for real-world projects, imparting the essential knowledge you need to tackle complex challenges with confidence. By the end of this Arduino book, you'll have seamlessly configured an end-to-end system, all while immersing yourself in practical scenarios that bring the world of IoT to life.
Table of Contents (20 chapters)
1
Part 1:Introduction to Arduino and Sensor Data
7
Part 2:Sending Data
14
Part 3: Miscellaneous Topics

Implementing a REST API using JavaScript

So far, we have learned about creating tables, as well as inserting, updating, and deleting data using a relational database and a terminal. However, we do not have access to this terminal from our microcontrollers. To communicate with our database server from the microcontrollers, we will introduce a middleware, called an API server. There are various types of APIs but we will utilize REST.

We will implement a REST API using a server-side version of JavaScript called Node.js. From the website, it is described as an asynchronous, event-driven JavaScript runtime that lets you run JavaScript code outside of a web browser. You can learn more about it at https://nodejs.org/en. Let’s begin by installing the Node.js CLI from the Ubuntu CLI.

Installing Node.js

Follow these steps to install Node.js on your instance of Ubuntu Server:

  1. Log into the remote server using the following shell command, making sure you replace the IP address...