You're reading from Learn Robotics Programming Build and control AI-enabled autonomous robots using the Raspberry Pi and Python

Product type Paperback

Published in Feb 2021

Publisher Packt

ISBN-13 9781839218804

Length 602 pages

Edition 2nd Edition

Languages

Python

Tools

Raspberry Pi

Concepts

Robotics

Author (1):

Danny Staple

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Table of Contents (25) Chapters

Preface

1. Section 1: The Basics – Preparing for Robotics

2. Chapter 1: Introduction to Robotics FREE CHAPTER

3. Chapter 2: Exploring Robot Building Blocks – Code and Electronics

4. Chapter 3: Exploring the Raspberry Pi

5. Chapter 4: Preparing a Headless Raspberry Pi for a Robot

6. Chapter 5: Backing Up the Code with Git and SD Card Copies

7. Section 2: Building an Autonomous Robot – Connecting Sensors and Motors to a Raspberry Pi

8. Chapter 6: Building Robot Basics – Wheels, Power, and Wiring

9. Chapter 7: Drive and Turn – Moving Motors with Python

10. Chapter 8: Programming Distance Sensors with Python

11. Chapter 9: Programming RGB Strips in Python

12. Chapter 10: Using Python to Control Servo Motors

13. Chapter 11: Programming Encoders with Python

14. Chapter 12: IMU Programming with Python

15. Section 3: Hearing and Seeing – Giving a Robot Intelligent Sensors

16. Chapter 13: Robot Vision – Using a Pi Camera and OpenCV

17. Chapter 14: Line-Following with a Camera in Python

18. Chapter 15: Voice Communication with a Robot Using Mycroft

19. Chapter 16: Diving Deeper with the IMU

20. Chapter 17: Controlling the Robot with a Phone and Python

21. Section 4: Taking Robotics Further

22. Chapter 18: Taking Your Robot Programming Skills Further

23. Chapter 19: Planning Your Next Robot Project – Putting It All Together

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Adding sound input and output to the Raspberry Pi

Before we can use a voice processing/voice assistant, we need to give the Raspberry Pi some speakers and a microphone. A few Raspberry Pi add-ons provide this. My recommendation, with a microphone array (for better recognition) and a connection to speakers, is the ReSpeaker 2-Mics Pi HAT, which is widely available.

The next photograph shows the ReSpeaker 2-Mics Pi HAT:

Figure 15.1 – The ReSpeaker 2-Mics Pi HAT

Figure 15.1 shows a photo of a ReSpeaker 2-Mics Pi HAT mounted on a Raspberry Pi. On the left, I've labeled the left microphone. The hat has two microphones, which are two tiny rectangular metal parts on each side. The next label is for 3 RGB LEDs and a button connected to a GPIO pin. After this are the two ways of connecting speakers – a 3.5mm jack or a JST connector. I recommend you connect a speaker to hear output from this HAT. Then, the last label highlights the right microphone...