Kotlin Interface & DSL for Pi4J V2
For Pi4J V1 Kotlin Bindings, check Pi4K
Full documentation can be found on the website
This is a minimal working example, make sure to check it out for full introduction and comments.
const val PIN_BUTTON = 24 // PIN 18 = BCM 24
const val PIN_LED = 22 // PIN 15 = BCM 22
var pressCount = 0
console {
title("<-- The Pi4J Project -->", "Minimal Example project")
pi4j {
digitalInput(PIN_BUTTON) {
id("button")
name("Press button")
pull(PullResistance.PULL_DOWN)
debounce(3000L)
piGpioProvider()
}.onLow {
pressCount++
+"Button was pressed for the ${pressCount}th time"
}
}
digitalOutput(PIN_LED) {
id("led")
name("LED Flasher")
shutdown(DigitalState.LOW)
initial(DigitalState.LOW)
piGpioProvider()
}.run {
while (pressCount < 5) {
+"LED ${state()}"
toggle()
sleep(500L / (pressCount + 1))
}
}
}
}
}
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