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)
Part 1:Introduction to Arduino and Sensor Data
Part 2:Sending Data
Part 3: Miscellaneous Topics

Implementing HA for RESTful servers

A RESTful server is a web server that makes API endpoints available for consumption. There are various web servers, such as Apache and NGINX, and configuring each one is different.

To implement HA for a web server, you must implement a proxy server in front of the web servers that you will be setting up. In this scenario, the web servers will all make use of the same static files and assets, which will be deployed in a central location. If there is a need for a database connection, then the database server will be hosted separately. Rather than connecting to individual web servers, all traffic is directed to the load balancer, which then distributes traffic. That is how all major websites function.

One of the considerations for a load balancer is how to distribute traffic to the nodes within your cluster. Some common methods in use are as follows:

  • Round-robin: In this approach, traffic is distributed evenly. For example, if you have...