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Getting started with Pi4J
Set up a new Raspberry Pi
Understanding the GPIO pins
Electrical Engineering
Java development with VSC
Developing on a remote PC
Minimal example application
Minimal example as FAT JAR
User interface with JavaFX
Game development with FXGL
FXGl to Picade
JavaFX kiosk mode
JavaFX GUI and MVC template
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Documentation
Pin numbering
Java for ARMv6/7/8
Logging with SLF4J
Creating a Pi4J Context
Choosing a Platform
Raspberry Pi
Choosing an I/O Provider
GpioD Provider
LinuxFS Provider
PiGpio Provider
Using Board Info
Building an I/O Instance
I/O Examples
Digital Output (GPIO)
Digital Input (GPIO)
Pulse Width Modulation (PWM)
Inter-Integrated Circuit (I²C)
I²C Clock Stretching
Serial Peripheral Interface (SPI)
Serial (UART/RS232)
I/O Registry
Shutting down the Pi4J Context
Building and running
Building with javac
Build as a FAT JAR with Maven
Build Java modules with Maven
Build Java modules with Gradle
Running Pi4J with JBang
Example Implementations
JBang Examples
Minimal Example
8x8 LED Matrix
BME280 Sensor
Pixelblaze Output Expander
Controlling a LED Matrix
LED strip with a JavaFX UI
Component Examples
Simple Button
Simple LED
AD Converter ADS1115
Buzzer
Camera
Joystick
Joystick Analog
LCD Display
LED Button
LED Matrix
LED Strip
Potentiometer
ServoMotor
Electronics with CrowPi
Develop with Intellij IDEA
CrowPi examples
Community Implementations
Prototype Board
BMP280 Sensor
Pi4J Operating System
Prepare SD with Pi4J OS
Test Pi4J Basic OS
Test Pi4J Picade OS
Architecture/Design
Project source structure
Download/Install
Build Instructions
Maven settings
Code styling
Hardware testing
Advanced
Annotated provisioning
Dependency injection
Native Library Path
Plug-ins
Remote support
The Pi4J Logo
Pi4J Kotlin DSL
Minimal Kotlin Pi4J example
Kotlin API & DSL Documentation
Coroutines Support
I²C Kotlin DSL
Serial Kotlin DSL
Blogs
Interview Tom Aarts
PWM Hardware Support on RPi5
Interview Robert von Burg
Ongoing I2C Improvements
LED Matrix with SPI MAX7219
Alexander Liggesmeyer and RPi5
Pi4J Operating System
LED strip with Pi4J and JBang
Kotlin on the Raspberry Pi
Getting Started Template
Featured Projects
Soft real time PLC
PiJukeBox
CocktailPi
Didier the street artist robot
JMonkeyEngine with Joystick
Sensor drivers
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Sensor drivers