You're reading from Internet of Things Programming Projects Build exciting IoT projects using Raspberry Pi 5, Raspberry Pi Pico, and Python

Product type Paperback

Published in Jun 2024

Publisher Packt

ISBN-13 9781835082959

Length 458 pages

Edition 2nd Edition

Languages

Python

Tools

Raspberry Pi

Concepts

IoT Development

Author (1):

Colin Dow

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Table of Contents (21) Chapters

Preface

1. Part 1: Setting Up the Raspberry Pi for IoT Development FREE CHAPTER

2. Chapter 1: Understanding the Raspberry Pi

3. Chapter 2: Harnessing Web Services with the Raspberry Pi

4. Chapter 3: Building an IoT Weather Indicator

5. Chapter 4: Building an IoT Information Display

6. Part 2: Building an IoT Home Security Dashboard

7. Chapter 5: Exploring the GPIO

8. Chapter 6: Building an IoT Alarm Module

9. Chapter 7: Building an IoT Button

10. Chapter 8: Creating an IoT Alarm Dashboard

11. Part 3: Creating a LoRa-Enabled IoT Monitoring Station

12. Chapter 9: Understanding LoRa

13. Chapter 10: Integrating LoRa with the Internet

14. Part 4: Building an IoT Robot Car

15. Chapter 11: Introducing ROS

16. Chapter 12: Creating an IoT Joystick

17. Chapter 13: Introducing Advanced Robotic Eyes for Security (A.R.E.S.)

18. Chapter 14: Adding Computer Vision to A.R.E.S.

19. Index

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Building an IoT Alarm Module

In the previous chapter, we explored the Raspberry Pi’s GPIO port and built a basic alarm system. We learned about different communication protocols and worked with a set of sensors, which we accessed using the GPIO port. In this chapter, we will enhance our basic alarm system using a Raspberry Pi Pico W, a public Message Queuing Telemetry Transport (MQTT) server, and the MQTTHQ web client (Figure 6.1).

We will use a Raspberry Pi Pico W to host a passive infrared (PIR) sensor and buzzer as we build our IoT alarm module. In our setup, when motion is detected, a motion message is sent to the MQTT server and viewed using the MQTTHQ web client:

Figure 6.1 – IoT-powered alarm module using MQTT

We will send a buzzer message to the Raspberry Pi Pico W from the MQTTHQ web client to activate the buzzer. This Raspberry Pi Pico W and MQTTHQ web client setup forms the foundation of our IoT home security system.

We&...