GPIO digital input doesn't change state as button is pressed/realised

[zaze06]

I'm trying to update data on a screen when buttons are pressed, but the buttons whont be registered as pressed according to Pi4j button initialization:

button1 = pi4j.create(DigitalInput.newConfigBuilder(pi4j)
                .id("button")
                .name("button 1")
                .address(GPIOPin.GPIO27)
                .pull(PullResistance.PULL_DOWN)
                .debounce(3000L)
                .provider("linuxfs-digital-input")
        );

        button2 = pi4j.create(DigitalInput.newConfigBuilder(pi4j)
                .id("button1")
                .name("button 2")
                .address(GPIOPin.GPIO22)
                .pull(PullResistance.PULL_DOWN)
                .debounce(3000L)
                .provider("linuxfs-digital-input")
        );

        button3 = pi4j.create(DigitalInput.newConfigBuilder(pi4j)
                .id("button2")
                .name("button 3")
                .address(GPIOPin.GPIO23)
                .pull(PullResistance.PULL_DOWN)
                .debounce(3000L)
                .provider("linuxfs-digital-input")
        );

        home = pi4j.create(DigitalInput.newConfigBuilder(pi4j)
                .id("button3")
                .name("button home")
                .address(GPIOPin.GPIO17)
                .pull(PullResistance.PULL_DOWN)
                .debounce(3000L)
                .provider("linuxfs-digital-input")
        );

I read the state of the buttons using the DigitalInput#isHigh() and DigitalInput#isLow() methods in a javax.swing.Timer

The timer is defined as a field and the java.awt.event.ActionListener is provided on the definition of the Timer. The timer is started after the buttons have ben defined.

Build.gradle dependencies include com.pi4j:pi4j-plugin-linuxfs:2.3.0

Physical setup:

links to the code parts: button setup Timer forn the button reads Build.gradle dependencies

If more information is needed I will be glad to try to provide it.

[taartspi]

The wiring detail appears to be some additional board and not the Pi 40 pin connector. Not knowing how this maps to the pi 40 I can’t validate which pin numbering scheme you used. But the pi4j code uses the BCM numbering for the address. Also I use the linuxfs for i2c work but not gpio. So I can’t say if you encountered a bug so also try your code using the pigpio provider. My suggestions

[FDelporte]

Indeed as @taartspi pointed out digital input and output with LinuxFS are under construction... https://pi4j.com/documentation/providers/linuxfs/

Please try adding the following dependency

   <dependency>
        <groupId>com.pi4j</groupId>
        <artifactId>pi4j-plugin-pigpio</artifactId>
        <version>${pi4j.version}</version>
    </dependency>

And configure the button pins with the pigpio-digital-input provider

button1 = pi4j.create(DigitalInput.newConfigBuilder(pi4j)
                .id("button")
                .name("button 1")
                .address(GPIOPin.GPIO27)
                .pull(PullResistance.PULL_DOWN)
                .debounce(3000L)
                .provider("pigpio-digital-input")
        );