https://github.com/pi4j/pi4j-kotlin

Kotlin DSL for Pi4J V2
https://github.com/pi4j/pi4j-kotlin

dsl gpio kotlin kotlin-backend kotlin-bindings kotlin-library pi4j pi4k raspberry-pi raspberry-pi-gpio

Last synced: about 1 year ago
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Kotlin DSL for Pi4J V2

• Host: GitHub
• URL: https://github.com/pi4j/pi4j-kotlin
• Owner: Pi4J
• License: apache-2.0
• Created: 2022-09-12T15:04:05.000Z (almost 4 years ago)
• Default Branch: master
• Last Pushed: 2024-07-25T13:10:02.000Z (almost 2 years ago)
• Last Synced: 2025-03-26T13:21:18.435Z (over 1 year ago)
• Topics: dsl, gpio, kotlin, kotlin-backend, kotlin-bindings, kotlin-library, pi4j, pi4k, raspberry-pi, raspberry-pi-gpio
• Language: Kotlin
• Homepage: https://pi4j.com/kotlin/
• Size: 145 KB
• Stars: 49
• Watchers: 5
• Forks: 1
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.txt

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README

          
# Pi4J - Kotlin

Kotlin Interface & DSL for [Pi4J V2](https://github.com/Pi4J/pi4j-v2)  

For Pi4J V1 Kotlin Bindings, check [Pi4K](https://github.com/mhashim6/Pi4K) (no longer supported).

[![Awesome Kotlin Badge](https://kotlin.link/awesome-kotlin.svg)](https://github.com/KotlinBy/awesome-kotlin)

[![Maven Central](https://img.shields.io/maven-central/v/com.pi4j/pi4j-ktx.svg?label=Maven%20Central)](https://search.maven.org/search?q=g:%22com.pi4j%22%20AND%20a:%22pi4j-ktx%22)

[![License](https://img.shields.io/github/license/pi4j/pi4j-v2)](http://www.apache.org/licenses/LICENSE-2.0)

![GitHub Actions build state](https://github.com/pi4j/pi4j-kotlin/workflows/Build%20pi4j-kotlin/badge.svg)

## Documentation

Full documentation can be found on the [website](https://pi4j.com/kotlin/kotlin-api-docs/)

## Example

This is a minimal working example, make sure

to [check it out](https://github.com/Pi4J/pi4j-kotlin/blob/master/example/src/main/kotlin/MinimalExample.kt) for full

introduction and comments.

``` kotlin

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))

        }

      }

    }

  }

}

```