Notice

This repo is for Pi4J V1 and is no longer maintained. The project is now maintained at Pi4J/pi4j-kotlin instead

Pi4K

Pi4J Kotlin bindings.

Demo

Make sure to check Examples.kt.

fun blink() = digitalOutput(GPIO_01) {
    while (true) {
        toggle()
        delay(500)
    }
}

• Pulse:

digitalOutput(GPIO_01).pulse(600)

• Triggers:

val input = digitalInput(GPIO_04)
val output = digitalOutput(GPIO_05)
input.trigger(output) //output is HIGH when input is HIGH.
// input.trigger(output, whenState = PinState.LOW, targetState = PinState.HIGH) //output is HIGH when input is LOW.

• Pulse triggers:

val input = digitalInput(GPIO_04)
val output = digitalOutput(GPIO_05)
input.triggerPulse(output, PinState.HIGH, millis = 1000) //when input is HIGH, output is HIGH for 1 second

• State change listeners:

digitalInput(GPIO_06).onStateChange { event, edge, state -> println(state) }

• PWM

pwm(clockDivisor = 500, mode = PWM_MODE_MS, range = 1000)
pwmOutput(GPIO_01, 400)

• Software PWM

softPwmOutput(GPIO_01, 400)

• Analog counterparts are also available.

• When done with gpio, housekeeping is necessary;

gpioShutdown()

Testing

Tests were simulated on my machine using the PI4J_PLATFORM=Simulated Environment variable.
However, I was not able to mock/test AnalogPins bindings. Contributions are always welcome.

Dependency

• Gradle

Add it in your root build.gradle at the end of repositories:

allprojects {
    repositories {
        ...
        maven { url 'https://jitpack.io' }
    }
}

Add the dependency:

dependencies {
    implementation 'com.github.mhashim6:Pi4K:0.1'
}

• Maven

<repositories>
    <repository>
        <id>jitpack.io</id>
        <url>https://jitpack.io</url>
    </repository>
</repositories>

Add the dependency:

<dependency>
    <groupId>com.github.mhashim6</groupId>
    <artifactId>Pi4K</artifactId>
    <version>0.1</version>
</dependency>