Nothing happens :(

[malk82]

Hello everyone,
I have a problem: nothing happens when I run the program below:

`package gc.services.blink;

import com.pi4j.Pi4J;
import com.pi4j.io.gpio.digital.DigitalState;
import lombok.extern.slf4j.Slf4j;

import java.util.concurrent.TimeUnit;

@slf4j
public class Main {

public static final int DIGITAL_OUTPUT_PIN = 16;

public static void main(String[] args) throws Exception{
    log.info("Start");
    // Initialize Pi4J with an auto context
    // An auto context includes AUTO-DETECT BINDINGS enabled
    // which will load all detected Pi4J extension libraries
    // (Platforms and Providers) in the class path
    var pi4j = Pi4J.newAutoContext();

    // create a digital output instance using the default digital output provider
    var output = pi4j.dout().create(DIGITAL_OUTPUT_PIN);
    output.config().shutdownState(DigitalState.HIGH);

    // lets invoke some changes on the digital output
    output.state(DigitalState.HIGH)
            .state(DigitalState.LOW)
            .state(DigitalState.HIGH)
            .state(DigitalState.LOW);

    // lets toggle the digital output state a few times
    output.toggle()
            .toggle()
            .toggle();


    // another friendly method of setting output state
    output.high()
            .low();

    // lets read the digital output state
    log.info("CURRENT DIGITAL OUTPUT [" + output + "] STATE IS [");
    log.info(output.state() + "]");

    // pulse to HIGH state for 3 seconds
    log.info("PULSING OUTPUT STATE TO HIGH FOR 3 SECONDS");
    output.pulse(3, TimeUnit.SECONDS, DigitalState.HIGH);
    log.info("PULSING OUTPUT STATE COMPLETE");

    // shutdown Pi4J
    pi4j.shutdown();
    log.info("End");
}

}
`

this is my pom:
`

4.0.0

<groupId>gc.services</groupId>
<artifactId>blink</artifactId>
<version>1.0-SNAPSHOT</version>

<properties>
    <java.version>11</java.version>
    <maven.compiler.source>11</maven.compiler.source>
    <maven.compiler.target>11</maven.compiler.target>

    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <main.class>gc.services.blink.Main</main.class>

    <slf4j.version>1.7.36</slf4j.version>
    <pi4j.version>2.1.1</pi4j.version>

    <maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version>
    <maven-jar-plugin.version>3.1.0</maven-jar-plugin.version>
    <maven-shade-plugin.version>3.2.4</maven-shade-plugin.version>
</properties>

<dependencies>

    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.24</version>
        <scope>provided</scope>
    </dependency>

    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>${slf4j.version}</version>
    </dependency>
    <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-classic</artifactId>
        <version>1.2.11</version>
    </dependency>

    <!-- include Pi4J Core -->
    <dependency>
        <groupId>com.pi4j</groupId>
        <artifactId>pi4j-core</artifactId>
        <version>${pi4j.version}</version>
    </dependency>

    <!-- include Pi4J Plugins (Platforms and I/O Providers) -->
    <dependency>
        <groupId>com.pi4j</groupId>
        <artifactId>pi4j-plugin-raspberrypi</artifactId>
        <version>${pi4j.version}</version>
    </dependency>
    <dependency>
        <groupId>com.pi4j</groupId>
        <artifactId>pi4j-plugin-pigpio</artifactId>
        <version>${pi4j.version}</version>
    </dependency>
</dependencies>

<build>
    <finalName>blink</finalName>

    <plugins>
        <!--
        https://maven.apache.org/plugins/maven-compiler-plugin/
        The Compiler Plugin is used to compile the sources of your project.
        -->
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>${maven-compiler-plugin.version}</version>
            <configuration>
                <release>${java.version}</release>
                <showDeprecation>true</showDeprecation>
                <showWarnings>true</showWarnings>
                <verbose>false</verbose>
            </configuration>
        </plugin>

        <!--
        https://maven.apache.org/plugins/maven-jar-plugin/
        This plugin provides the capability to build (executable) jars and is used here to set the mainClass
        which will start the application.
        -->
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-jar-plugin</artifactId>
            <version>${maven-jar-plugin.version}</version>
            <configuration>
                <archive>
                    <manifest>
                        <mainClass>${main.class}</mainClass>
                    </manifest>
                </archive>
            </configuration>
        </plugin>

        <!--
        https://maven.apache.org/plugins/maven-shade-plugin/
        This plugin provides the capability to package the artifact in an uber-jar, including its dependencies and
        to shade - i.e. rename - the packages of some of the dependencies. The transformer will combine the files
        in the META-INF.services directories of multiple Pi4J plugins with the same package name into one file.
        -->
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-shade-plugin</artifactId>
            <version>${maven-shade-plugin.version}</version>
            <configuration>
                <transformers>
                    <transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
                </transformers>
            </configuration>
            <executions>
                <execution>
                    <phase>package</phase>
                    <goals>
                        <goal>shade</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

`

I compile the code on a windows 10 machine, then I run the code on my Raspberry -> Raspberry Pi 4 Model B Rev 1.2
java -version -> openjdk version "17.0.1" 2021-10-19 LTS
I connected on the bcm pin 16 a jumper to a resistor (220 Ohm) in series with a red 2.1V led. Another jumper from the led cathode to the ground.
Nothing happens, this is the log:

08:53:34.888 [main] INFO com.pi4j.Pi4J - New auto context
08:53:34.889 [main] INFO com.pi4j.Pi4J - New context builder
08:53:35.289 [main] DEBUG com.pi4j.runtime.impl.DefaultRuntime - Pi4J runtime context successfully created & initialized.'
08:53:35.569 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - added io to managed provider map [id=raspberrypi-pwm; name=RaspberryPi PWM Provider; class=com.pi4j.plugin.raspberrypi.provider.pwm.RpiPwmProviderImpl]
08:53:35.615 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - added io to managed provider map [id=pigpio-spi; name=PiGpio SPI Provider; class=com.pi4j.plugin.pigpio.provider.spi.PiGpioSpiProviderImpl]
08:53:35.665 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - added io to managed provider map [id=raspberrypi-i2c; name=RaspberryPi I2C Provider; class=com.pi4j.plugin.raspberrypi.provider.i2c.RpiI2CProviderImpl]
08:53:35.713 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - added io to managed provider map [id=pigpio-digital-output; name=PiGpio Digital Output (GPIO) Provider; class=com.pi4j.plugin.pigpio.provider.gpio.digital.PiGpioDigitalOutputProviderImpl]
08:53:35.748 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - added io to managed provider map [id=pigpio-serial; name=PiGpio Serial Provider; class=com.pi4j.plugin.pigpio.provider.serial.PiGpioSerialProviderImpl]
08:53:35.786 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - added io to managed provider map [id=raspberrypi-digital-input; name=RaspberryPi Digital Input (GPIO) Provider; class=com.pi4j.plugin.raspberrypi.provider.gpio.digital.RpiDigitalInputProviderImpl]
08:53:35.815 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - added io to managed provider map [id=raspberrypi-serial; name=RaspberryPi Serial Provider; class=com.pi4j.plugin.raspberrypi.provider.serial.RpiSerialProviderImpl]
08:53:35.842 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - added io to managed provider map [id=raspberrypi-spi; name=RaspberryPi SPI Provider; class=com.pi4j.plugin.raspberrypi.provider.spi.RpiSpiProviderImpl]
08:53:35.880 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - added io to managed provider map [id=raspberrypi-digital-output; name=RaspberryPi Digital Output (GPIO) Provider; class=com.pi4j.plugin.raspberrypi.provider.gpio.digital.RpiDigitalOutputProviderImpl]
08:53:35.919 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - added io to managed provider map [id=pigpio-digital-input; name=PiGpio Digital Input (GPIO) Provider; class=com.pi4j.plugin.pigpio.provider.gpio.digital.PiGpioDigitalInputProviderImpl]
08:53:35.955 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - added io to managed provider map [id=pigpio-i2c; name=PiGpio I2C Provider; class=com.pi4j.plugin.pigpio.provider.i2c.PiGpioI2CProviderImpl]
08:53:35.989 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - added io to managed provider map [id=pigpio-pwm; name=PiGpio PWM Provider; class=com.pi4j.plugin.pigpio.provider.pwm.PiGpioPwmProviderImpl]
08:53:35.990 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - providers loaded [12]
08:53:35.991 [main] INFO c.p.p.impl.DefaultRuntimePlatforms - adding platform to managed platform map [id=raspberrypi; name=RaspberryPi Platform; priority=5; class=com.pi4j.plugin.raspberrypi.platform.RaspberryPiPlatform]
08:53:35.993 [main] DEBUG c.p.p.impl.DefaultRuntimePlatforms - default platform is now [id=raspberrypi; name=RaspberryPi Platform; class=com.pi4j.plugin.raspberrypi.platform.RaspberryPiPlatform]
08:53:35.994 [main] DEBUG c.p.p.impl.DefaultRuntimePlatforms - platforms loaded [1]
08:53:35.995 [main] DEBUG com.pi4j.runtime.impl.DefaultRuntime - Pi4J context/runtime successfully initialized.'
08:53:35.996 [main] DEBUG com.pi4j.context.impl.DefaultContext - Pi4J runtime context successfully created & initialized.'
08:53:35.996 [main] DEBUG c.p.c.impl.DefaultContextBuilder - Pi4J successfully created and initialized a new runtime 'Context'.'
08:53:36.171 [main] INFO gc.services.blink.Main - CURRENT DIGITAL OUTPUT [@DOUT-16 "DOUT-16" (#16)] STATE IS [
08:53:36.209 [main] INFO gc.services.blink.Main - LOW]
08:53:36.210 [main] INFO gc.services.blink.Main - PULSING OUTPUT STATE TO HIGH FOR 3 SECONDS
08:53:39.211 [main] INFO gc.services.blink.Main - PULSING OUTPUT STATE COMPLETE
08:53:39.216 [main] DEBUG c.p.p.impl.DefaultRuntimePlatforms - removed platform from managed platform map [id=raspberrypi; name=RaspberryPi Platform; class=com.pi4j.plugin.raspberrypi.platform.RaspberryPiPlatform]
08:53:39.233 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=pigpio-spi; name=PiGpio SPI Provider; class=com.sun.proxy.$Proxy1]
08:53:39.234 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=pigpio-pwm; name=PiGpio PWM Provider; class=com.sun.proxy.$Proxy11]
08:53:39.236 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=raspberrypi-spi; name=RaspberryPi SPI Provider; class=com.sun.proxy.$Proxy7]
08:53:39.237 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=raspberrypi-digital-output; name=RaspberryPi Digital Output (GPIO) Provider; class=com.sun.proxy.$Proxy8]
08:53:39.238 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=raspberrypi-digital-input; name=RaspberryPi Digital Input (GPIO) Provider; class=com.sun.proxy.$Proxy5]
08:53:39.239 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=pigpio-i2c; name=PiGpio I2C Provider; class=com.sun.proxy.$Proxy10]
08:53:39.240 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=pigpio-digital-output; name=PiGpio Digital Output (GPIO) Provider; class=com.sun.proxy.$Proxy3]
08:53:39.254 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=raspberrypi-i2c; name=RaspberryPi I2C Provider; class=com.sun.proxy.$Proxy2]
08:53:39.256 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=pigpio-serial; name=PiGpio Serial Provider; class=com.sun.proxy.$Proxy4]
08:53:39.257 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=raspberrypi-pwm; name=RaspberryPi PWM Provider; class=com.sun.proxy.$Proxy0]
08:53:39.258 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=raspberrypi-serial; name=RaspberryPi Serial Provider; class=com.sun.proxy.$Proxy6]
08:53:39.259 [main] DEBUG c.p.p.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=pigpio-digital-input; name=PiGpio Digital Input (GPIO) Provider; class=com.sun.proxy.$Proxy9]
08:53:39.260 [main] DEBUG com.pi4j.runtime.impl.DefaultRuntime - Pi4J context/runtime successfully shutdown.'

Any help will be appreciated :)

[taartspi]

I believe the dout().create() creates the output pin with no operational provider. I did not see a means to add a valid provider using that pattern so I changed your code as seen below, the LED blinks and remains ON at completion.

I did not have your logging class so I modified the code to use the console. Also, for my clarification, you refer to pin 16, which is BCM16, pin 36.

            // create a digital output instance using the default digital output provider
            /*
            var output = pi4j.dout().create(DIGITAL_OUTPUT_PIN);
            output.config().shutdownState(DigitalState.HIGH);
            */
            
            DigitalOutput output = null;
            var outputConfig3 = DigitalOutput.newConfigBuilder(pi4j)
                    .address(DIGITAL_OUTPUT_PIN)
                    .shutdown(DigitalState.HIGH)
                    .provider("pigpio-digital-output");
            try {
                output = pi4j.create(outputConfig3);
            } catch (Exception e) {
                e.printStackTrace();
                console.println("create DigOut EN failed");
                System.exit(203);
            }

[malk82]

It works !!!!
thanks!!!!