Book Image

Internet of Things from Scratch

By : Renaldi Gondosubroto
Book Image

Internet of Things from Scratch

By: Renaldi Gondosubroto

Overview of this book

Develop the skills essential for building Internet of Things solutions with this indispensable guide. In an era where industries heavily rely on IoT, this book will quickly familiarize you with its foundations, widespread use, implementation guided by best practices, and the crucial technologies that allow it to work effectively. Starting with the use of IoT in real-life scenarios, this book offers comprehensive insights into basic IoT hardware, protocols, and technologies. You’ll then learn about architecting and implementing solutions such as wireless sensor networks, cloud computing with AWS, and crucial security considerations. You’ll understand how these systems are operated and monitored over time and work with simple to complex, industry-grade systems, adhering to best practices. In later chapters, you’ll be apprised of future IoT trends and strategies to manage the risks and opportunities that come with them. You’ll also get to grips with a diverse set of tools, including hardware such as ESP32 and Raspberry Pi, and software such as Mosquitto and ChatGPT for generative AI capabilities. By the end of this IoT book, you’ll be able to independently build and design complex, industry-standard solutions fully aligned with best practices.
Table of Contents (22 chapters)
1
Part 1: Getting Started with the Internet of Things
6
Part 2: Developing and Optimizing IoT Systems for Smart Environments
11
Part 3: Operating, Maintaining, and Securing IoT Networks
16
Part 4: Delving into Complex Systems and the Future of IoT

Practical scenario – working with multiple communication protocols with ESP32

In this hands-on project, we’ll build an access control system using an MFRC522 RFID reader connected to an ESP32 microcontroller. This system will read, write, and register MIFARE 13.56 MHz RFID cards. When a scanned ID card matches any registered ID, the microcontroller will issue an MQTT publish message. This message instructs a remote MQTT subscriber, running on another ESP32 microcontroller, to activate the corresponding switch meant to enable door access. However, in this demonstration, we won’t connect to an actual switch. Instead, we’ll illuminate the built-in LED on the MQTT subscriber’s ESP32 microcontroller to simulate the process.

You will require the following materials:

  • 2x ESP32 NodeMCU microcontroller
  • 1x MFRC522 RFID card reader
  • 1x push button (latch) switch
  • 2x MIFARE 13.56 MHz RFID cards, fobs, or NFC cards
  • Jumper cables
...