GITHUB PROJECT: https://github.com/Pi4J/pi4j-example-minimal
Because the Pi4J V2+ project follows the modular approach of Java, the functionality of the framework has been split into different modules, each with their own responsibility.
The easiest way to start a new project, is to copy one of the example projects which include a full Maven pom.xml-file
with all the required steps and configurations to build the project with all its modules into the target/distribution
directory.
Take for instance a look at the “Minimal example application”.
Build your project with:
$ mvn clean package
When finished, you will find the generated package and required Java-modules and can start your application with the provided run.sh script:
$ cd target/distribution
$ ls -l
total 644
-rw-r--r-- 1 pi pi 364456 Jun 19 10:04 pi4j-core-2.0-SNAPSHOT.jar
-rw-r--r-- 1 pi pi 7243 Jun 19 10:04 pi4j-example-minimal-0.0.1.jar
-rw-r--r-- 1 pi pi 142461 Jun 19 10:04 pi4j-library-pigpio-2.0-SNAPSHOT.jar
-rw-r--r-- 1 pi pi 37302 Jun 19 10:04 pi4j-plugin-pigpio-2.0-SNAPSHOT.jar
-rw-r--r-- 1 pi pi 26917 Jun 19 10:04 pi4j-plugin-raspberrypi-2.0-SNAPSHOT.jar
-rwxr-xr-x 1 pi pi 101 Jun 19 10:04 run.sh
-rw-r--r-- 1 pi pi 52173 Jun 19 10:04 slf4j-api-2.0.0-alpha0.jar
-rw-r--r-- 1 pi pi 15372 Jun 19 10:04 slf4j-simple-2.0.0-alpha0.jar
$ sudo ./run.sh