Raspberry Pi Pico Experimentierkit: Programming & Projects

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Copyright © 2022 Elektor Verlag GmbH, Aachen. 1st Edition 2022. All rights reserved.

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Explanation

The author, translator, and editor have made every effort to ensure the accuracy of the information contained in this book. They assume no liability for losses or damages caused by errors or omissions in this book, regardless of whether these errors or omissions are due to negligence, oversight, or any other cause, and hereby disclaim any liability to third parties.

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Cover design: Elektor, Aachen

Translation: Andreas Reidenauer

Layout and typesetting: D-Vision, Julian van den Berg | Oss (NL)

Printing: Ipskamp Printing, Enschede, Netherlands

ISBN: 978-3-89576-511-7 (Print), 978-3-89576-512-4 (eBook)

Elektor-Verlag GmbH, Aachen. www.elektor.de

Elektor is part of the Elektor International Media (EIM) group, the world's most important source for technical information and electronics products for engineers and electronics developers, and for companies that employ these professionals. Elektor's international team develops high-quality content daily for developers and DIY electronics enthusiasts, distributed through various media (magazines, videos, digital media, and social media) in numerous languages. www.elektor.de

Contents

Foreword

Chapter 1: Raspberry Pi Pico Hardware

• 1.1 Overview
• 1.2 Pico Hardware Module
• 1.3 Comparison with Arduino UNO
• 1.4 Operating Conditions and Power Supply of the Pico
• 1.5 Pin Assignment of the RP2040 Microcontroller and the Pico Module
• 1.6 Raspberry Pi Pico Experimentierkit
• 1.6.1 Block Diagram of the Development Board

Chapter 2: Raspberry Pi Pico Programming Environment

• 2.1 Overview
• 2.2 Installing MicroPython on the Raspberry Pi Pico
• 2.2.1 Installing MicroPython on the Pico with a PC (Windows 10)
• 2.3 Using the Thonny Development Environment on the PC

Chapter 3: Simple Programs – Software Only

• 3.1 Overview
• 3.2 Example Programs
• 3.3 Summary

Chapter 4: Projects with Board Hardware

• 4.1 Overview
• 4.2 Project 1 – Blinking On-Board LED
• 4.3 Project 2 – SOS Blinking
• 4.4 Project 3 – Blinking LED – Using a Timer
• 4.5 Project 4 – Alternating Blinking LEDs
• 4.6 Project 5 – Controlling an LED via Button
• 4.7 Project 6 – Changing LED Blink Frequency Using Button Interrupts
• 4.8 Project 7 – Binary Counter with LEDs
• 4.9 Project 8 – Randomly Blinking Yellow, Green, and Blue LEDs
• 4.10 Project 9 – LED Chaser Light
• 4.11 Project 10 – Reaction Timer
• 4.12 Project 11 – Buttons and LEDs
• 4.13 Summary

Chapter 5: The TFT Display

• 5.1 Overview
• 5.2 The On-Board TFT Display
• 5.2.1 Drawing Shapes
• 5.2.2 Displaying Text
• 5.2.3 Further TFT Functions
• 5.3 Project 1 – Second Counter
• 5.4 Project 2 – Event Counter
• 5.5 Project 3 – Reaction Timer
• 5.6 Project 4 – Displaying LED and Button Status
• 5.7 Project 5 – Temperature and Humidity – Display in Thonny Window
• 5.8 Project 6 – Temperature and Humidity – LED Output
• 5.9 Project 7 – Temperature and Humidity – Display on TFT
• 5.10 Project 8 – ON/OFF Temperature Control
• 5.11 Project 9 – ON/OFF Temperature Control – Setting the Target Temperature
• 5.12 Analog-to-Digital Converter
• 5.12.1 Project 10 – Voltmeter
• 5.13 Pulse Width Modulation
• 5.13.1 Raspberry Pi Pico PWM Channels
• 5.13.2 Project 11 – Changing LED Brightness
• 5.14 Project 12 – Ultrasonic Distance Measurement – Display in Thonny Window
• 5.15 Project 13 – Ultrasonic Distance Measurement – Display on TFT
• 5.16 Project 14 – Person Size (Stadiometer)
• 5.17 Project 15 – Ultrasonic Reverse Parking Aid with Buzzer
• 5.18 Project 16 – Ultrasonic Level Control
• 5.19 Project 17 – Playing a Melody
• 5.20 Project 18 – Controlling a Servo Motor
• 5.21 Project 19 – Precise Servo Motor Control
• 5.22 Project 20 – WS2812 LED Strip Light Show – State Machine Approach
• 5.23 Project 21 – WS2812 LED Strip Light Show with the Neopixel Library
• 5.24 Project 22 – WS2812 LED Show – Another Example for the Neopixel Library
• 5.25 The MPU6050 IMU Module
• 5.26 Project 23 – Displaying the 3 Acceleration Dimensions
• 5.27 Project 24 – Maximum Acceleration of a Car on the TFT Display
• 5.28 Project 25 – Position Display with Gyroscope
• 5.29 Project 26 – MPU6050 Temperature Display
• 5.30 Project 27 – TFT Display Test
• 5.31 Project 28 – TFT Bitmap Display

Chapter 6: Connection via WLAN (Wi-Fi)

• 6.1 Overview
• 6.2 WLAN Connection with the Pico Kit
• 6.2.1 The ESP 12S Processor
• 6.2.2 Programming AT Commands
• 6.2.3 Project 1 – Connecting to the Local Wi-Fi Network and Displaying the IP Address
• 6.2.4 Establishing a TCP/UDP Connection
• 6.2.5 Project 2 – Controlling an LED via Wi-Fi from a Smartphone
• 6.2.6 Project 3 – Displaying Temperature on a Smartphone via Wi-Fi

Appendix A

• Transferring Files Between Pico Board and PC

Appendix B

• Projects and Features Used

Index