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

Working with MQTT

MQTT implements publish-subscribe machine-to-machine (M2M) communications in a lightweight manner. This makes it possible to communicate over limited bandwidth. It implements a broker, which you can think of as a stand-in for the post office. Brokers have topics, and endpoints publish messages into these topics. Other endpoints then subscribe to these topics and are notified when new messages are published.

MQTT brokers make it possible for IoT devices to communicate without knowing their addresses using topics. They also keep track of which clients are connected to the network using a keep-alive messaging system. MQTT has three key benefits:

  • Efficiency: The implementation uses the least amount of energy and data to send messages across
  • Reliability: The implementation has various quality-of-service levels that determine how messages are stored by the broker and either sent to clients or received by clients
  • Flexibility: The implementation lets developers...