Raspberry Pi Pico DIY Workshop: Build exciting projects in home automation, personal health, gardening, and citizen science

Cover
Title Page
Copyright
Dedication
Contributors
Table of Contents
Preface
Section 1: An Introduction to the Pico
Chapter 1: Getting Started with the Raspberry Pi Pico
	Technical requirements
	Introducing the Raspberry Pi Pico and RP2040
		RP2040 microcontroller
	Discussing variants of the Pico board
		Where to buy the Pico
	Soldering the Pico's headers
		Soldering the headers
	Implementing the "Hello World!" example
		MicroPython
	Implementing the LED-blinking example
		Description of the code sample
		CircuitPython example
		Launching Mu
		Second LED-blinking example
		CircuitPython or MicroPython?
	Identifying useful add-on hardware for the Pico
		Pico Breadboard Kit (USD 19.31)
		Pico GPIO Expansion Board (USD 10.34)
		Pico HAT Expansion (USD 13.79)
		Grove Shield for Pi Pico (USD 3.90)
		Pimoroni Pico Decker (Quad Expander) (USD 16.55)
	Summary
Chapter 2: Serial Interfaces and Applications
	Technical requirements
	Installing requisite libraries
		HTU21D-F temperature sensor
		DHT20 temperature and humidity sensor
		OLED display (driven by SSD1306)
		Wireless pack
	Using the UART interface to communicate between two Pico boards
		The UART interface
		Setting up the Pico
		Programming the Pico boards
		Testing the code
		Applications of the UART interface
	Interfacing sensors using the I2C interface
		Introduction to the I2C interface
		Pull-up resistors
		Testing the HTU21D-F temperature sensor
		HTU21D-F temperature sensor code
		Testing the DHT20 temperature sensor
		AHT20 temperature sensor code
		The Feather RP2040 board
		Troubleshooting
	Displaying temperature data using the SPI
		The Serial Peripheral Interface (SPI)
		Wiring up the display
		Displaying the temperature and humidity data
		The LILYGO RP2040 board
	Setting up the wireless pack
	Summary
Chapter 3: Home Automation Projects
	Technical requirements
	Installing the requisite libraries
		NeoPixel
		Wireless pack
	Interfacing sensors
	Controlling appliances
	Publishing sensor events to the cloud
		Setting up Adafruit IO
		Publishing events
	Controlling LED strips
	Introducing the RP2040 Connect
	Installing CircuitPython on the RP2040 Connect
		Connecting the RP2040 to the internet
	Summary
Chapter 4: Fun with Gardening!
	Technical requirements
	Why gardening?
	Installing the requisite libraries
		Soil sensor
		Wireless pack
		NeoPixel
	Setting up the soil sensor
	Setting up the wireless pack
	Setting up the NeoPixel LED
	Publishing data to ThingSpeak
	Putting it all together
	Summary
Section 2: Learning by Making
Chapter 5: Building a Weather Station
	Technical requirements
	Conducting citizen science experiments
	Installing the requisite libraries
		The AM2315 sensor
		BME280 sensor
		VEML6075 UV light sensor
	Testing the sensors
		Testing the BME280 sensor
		Testing the AM2315 temperature/humidity sensor
		Testing the VEML6075 sensor
		Testing the weather meter sensors
		Testing the wireless pack
	Assembling and testing the weather station
		Next steps
	Summary
Chapter 6: Designing a Giant Seven-Segment Display
	Technical requirements
	Inspiration for the project
		Potential use cases
	Installing the required libraries
		Wireless pack
	Selecting a seven-segment display
	Wiring up the giant seven-segment display
	Writing the drivers for the giant seven-segment display
	Using the display
		Simple web server
		Serial port example
		Tracking physical activity
	Putting it all together
	Summary
Chapter 7: Designing a Visual Aid for Tracking Air Quality
	Technical requirements
	Inspiration for the project
	Installing requisite libraries
		Stepper motor
		Wireless pack
		SCD30 CO2 sensor
	Using public data sources for air quality data
		Running the query on a Pico
	Interfacing a CO2 sensor with the Pico
	Interfacing the stepper motor
	Building the display
		Making an interactive display
	Summary
Section 3: Advanced Topics
Chapter 8: Building Wireless Nodes
	Technical requirements
	Installing requisite libraries
		Adafruit Bluefruit LE SPI Friend
		Optional – the LoRa module
		Optional – the CO2 sensor
	Interfacing a Bluetooth Low Energy module
		Publishing sensor data via the Bluetooth module
	Interfacing a Sigfox module
		What is Sigfox?
		Sigfox module
		Setting up the Sigfox module
	Interfacing a LoRa module
		What is LoRa?
		Considering an example scenario
	Summary
Chapter 9: Let's Build a Robot!
	Technical requirements
	Installing the prerequisites
		Installing the batteries
	Controlling the LEDs
	Motor selection and control
		DC motors
		Stepper motors
		Servo motors
		DC motor control
		Servo motor control
	Testing the sensors
		Ultrasonic sensor
		Line-following sensor
	Testing the robot
		Robotics contests
	Summary
Chapter 10: Designing TinyML Applications
	Technical requirements
		Optional hardware
	Introducing TinyML
		Introducing the Pico4ML
	Keyword recognition in audio samples
		Edge Impulse
	Classifying images
	Developing edge devices
	Summary
Chapter 11: Let's Build a Product!
	Technical requirements
	Understanding the Pico phone
	Capturing the requirements
		Selecting components
		Building a proof-of-concept
		Installing the requisite libraries
		Testing the Notecard
		Testing the keypad
	Designing a PCB
		Schematic capture
		PCB layout
		Enclosure selection
		Gerber file generation
		Board fabrication
		Assembling the PCB
	Bringing up the board
		Final assembly and testing
	Taking the project forward
		Replacing the Pico
		Pimoroni PGA2040 – USD 9.05
		RP2040 Stamp – USD 14.55
	Summary
Chapter 12: Best Practices for Working with the Pico
	Technical requirements
	Upgrading your Pico's firmware
	Programming the Pico using the Arduino IDE
		Downloading and installing the Arduino IDE
		Installing a board package for the Pico
	Programming in C/C++ using the Pico SDK
		Debuggers for the Raspberry Pi Pico
	Tools to aid with prototyping and product development
		Breadboard with Pico's pinout labels
		Power profiling your application
		Nordic Power Profiler Kit – USD 81.25
		Joulescope – USD 999
		Programming the PIOs
	Summary
Index
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