Creating new app from default template does not work #131

GeVanCo · 2021-09-19T09:45:23Z

GeVanCo
Sep 19, 2021

Used to use Pi4J 1.2, I'm trying to make the switch to Pi4J 2.0. First attempts don't look promising, though...

Steps followed:

Using Windows as RDW.
Prepared my RPi as described (installed a fresh Raspbian Lite - Buster - using the latest distro on raspberrypi.org)
Installed latest version of Maven (3.8.2 as of this writing)
Used the mvn archetype:generate -DarchetypeCatalog=local as installation command. Nothing more, nothing less.
As a result of this, the "minimal' application is automatically created as source file (no problem, why not as a test...)
I did the necessary changes for some items in the raspberry.properties file (IP, private key, installation path, location of JDK11 on the RPi,,...).
Using Visual Studio Code, I ran the following commands from within the project directory terminal:
mvn clean => OK
mvn install => OK, app is correctly installed on the RPi
mvn antrun:run@exec => fails when trying to run this line of code in the Main.java file: var led = pi4j.create(ledConfig);

This is the full output:

E:\AppData\VisualStudioCode\Java\pi4j_project\mijnapp>mvn antrun:run@exec               
[INFO] Scanning for projects...
[INFO] 
[INFO] --------------------------< com.gvc:mijnapp >---------------------------
[INFO] Building MijnApp 1.0
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- maven-antrun-plugin:3.0.0:run (exec) @ mijnapp ---
[INFO] Executing tasks
[INFO]   [sshexec] Connecting to 192.168.1.5:22
[INFO]   [sshexec] cmd : mkdir -p '/home/pi/mystuff/mijnapp/dist'
[INFO]       [scp] Connecting to 192.168.1.5:22
[INFO]       [scp] done.
[INFO]   [sshexec] Connecting to 192.168.1.5:22
[INFO]   [sshexec] cmd : cd '/home/pi/mystuff/mijnapp'; sudo '/usr/lib/jvm/jdk11.0.12/bin/java'  -Dfile.encoding=UTF-8  -p /home/pi/mystuff/mijnapp/dist/lib -m com.gvc.mijnapp/com.gvc.Main
11:30:13 [main] INFO com.pi4j.util.Console - ---------------------------
11:30:13 [main] INFO com.pi4j.util.Console - |  Hello Rasbian world !  |
11:30:13 [main] INFO com.pi4j.util.Console - ---------------------------
11:30:13 [main] INFO com.pi4j.Pi4J - New auto context
11:30:13 [main] INFO com.pi4j.Pi4J - New context builder
11:30:14 [main] DEBUG com.pi4j.runtime.impl.DefaultRuntime - Pi4J runtime context successfully created & initialized.'
11:30:14 [main] DEBUG com.pi4j.provider.impl.DefaultRuntimeProviders - added io to managed provider map [id=pigpio-pwm; name=PiGpio PWM Provider; class=com.pi4j.plugin.pigpio.provider.pwm.PiGpioPwmProviderImpl]
11:30:14 [main] DEBUG com.pi4j.provider.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]
11:30:14 [main] DEBUG com.pi4j.provider.impl.DefaultRuntimeProviders - added io to managed provider map [id=raspberrypi-serial; name=RaspberryPi Serial Provider; class=com.pi4j.plugin.raspberrypi.provider.serial.RpiSerialProviderImpl]
11:30:14 [main] DEBUG com.pi4j.provider.impl.DefaultRuntimeProviders - added io to managed provider map [id=pigpio-i2c; name=PiGpio I2C Provider; class=com.pi4j.plugin.pigpio.provider.i2c.PiGpioI2CProviderImpl]
11:30:14 [main] DEBUG com.pi4j.provider.impl.DefaultRuntimeProviders - added io to managed provider map [id=raspberrypi-spi; name=RaspberryPi SPI Provider; class=com.pi4j.plugin.raspberrypi.provider.spi.RpiSpiProviderImpl]
11:30:14 [main] DEBUG com.pi4j.provider.impl.DefaultRuntimeProviders - added io to managed provider map [id=pigpio-spi; name=PiGpio SPI Provider; class=com.pi4j.plugin.pigpio.provider.spi.PiGpioSpiProviderImpl]
11:30:14 [main] DEBUG com.pi4j.provider.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]
11:30:14 [main] DEBUG com.pi4j.provider.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]
11:30:14 [main] DEBUG com.pi4j.provider.impl.DefaultRuntimeProviders - added io to managed provider map [id=pigpio-serial; name=PiGpio Serial Provider; class=com.pi4j.plugin.pigpio.provider.serial.PiGpioSerialProviderImpl]
11:30:14 [main] DEBUG com.pi4j.provider.impl.DefaultRuntimeProviders - added io to managed provider map [id=raspberrypi-i2c; name=RaspberryPi I2C Provider; class=com.pi4j.plugin.raspberrypi.provider.i2c.RpiI2CProviderImpl]
11:30:14 [main] DEBUG com.pi4j.provider.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]
11:30:14 [main] DEBUG com.pi4j.provider.impl.DefaultRuntimeProviders - added io to managed provider map [id=raspberrypi-pwm; name=RaspberryPi PWM Provider; class=com.pi4j.plugin.raspberrypi.provider.pwm.RpiPwmProviderImpl]
11:30:14 [main] DEBUG com.pi4j.provider.impl.DefaultRuntimeProviders - providers loaded [12]
11:30:14 [main] INFO com.pi4j.platform.impl.DefaultRuntimePlatforms - adding platform to managed platform map [id=raspberrypi; name=RaspberryPi Platform; priority=5; class=com.pi4j.plugin.raspberrypi.platform.RaspberryPiPlatform]
11:30:14 [main] DEBUG com.pi4j.platform.impl.DefaultRuntimePlatforms - default platform is now [id=raspberrypi; name=RaspberryPi Platform; class=com.pi4j.plugin.raspberrypi.platform.RaspberryPiPlatform]
11:30:14 [main] DEBUG com.pi4j.platform.impl.DefaultRuntimePlatforms - platforms loaded [1]
11:30:14 [main] DEBUG com.pi4j.runtime.impl.DefaultRuntime - Pi4J context/runtime successfully initialized.'
11:30:14 [main] DEBUG com.pi4j.context.impl.DefaultContext - Pi4J runtime context successfully created & initialized.'
11:30:14 [main] DEBUG com.pi4j.context.impl.DefaultContextBuilder - Pi4J successfully created and initialized a new runtime 'Context'.'
11:30:14 [main] INFO com.pi4j.util.Console - --------------------
11:30:14 [main] INFO com.pi4j.util.Console - |  Pi4J PLATFORMS  |
11:30:14 [main] INFO com.pi4j.util.Console - --------------------
11:30:14 [main] INFO com.pi4j.util.Console -
PLATFORMS: [1] "Pi4J Runtime Platforms" <com.pi4j.platform.impl.DefaultPlatforms>
ÔööÔöÇPLATFORM: "RaspberryPi Platform" {raspberrypi} <com.pi4j.plugin.raspberrypi.platform.RaspberryPiPlatform> {Pi4J Platform for the RaspberryPi series of products.} 
11:30:14 [main] INFO com.pi4j.util.Console -
11:30:14 [main] DEBUG com.pi4j.library.pigpio.util.NativeLibraryLoader - Attempting to load library [libpi4j-pigpio.so] using path: [/lib/armhf/libpi4j-pigpio.so]
11:30:14 [main] ERROR com.pi4j.library.pigpio.util.NativeLibraryLoader - Unable to load [libpi4j-pigpio.so] using path: [/lib/armhf/libpi4j-pigpio.so]
java.lang.UnsatisfiedLinkError: /tmp/libpi4j-pigpio10570901447351471774.so: libpigpio.so.1: cannot open shared object file: No such file or directory
        at java.base/java.lang.ClassLoader$NativeLibrary.load0(Native Method)
        at java.base/java.lang.ClassLoader$NativeLibrary.load(ClassLoader.java:2442)
        at java.base/java.lang.ClassLoader$NativeLibrary.loadLibrary(ClassLoader.java:2498)
        at java.base/java.lang.ClassLoader.loadLibrary0(ClassLoader.java:2694)
        at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2627)
        at java.base/java.lang.Runtime.load0(Runtime.java:768)
        at java.base/java.lang.System.load(System.java:1837)
        at [email protected]/com.pi4j.library.pigpio.util.NativeLibraryLoader.loadLibraryFromClasspath(NativeLibraryLoader.java:221)
        at [email protected]/com.pi4j.library.pigpio.util.NativeLibraryLoader.load(NativeLibraryLoader.java:162)
        at [email protected]/com.pi4j.library.pigpio.internal.PIGPIO.<clinit>(PIGPIO.java:74)
        at [email protected]/com.pi4j.library.pigpio.impl.PiGpioNativeImpl.gpioInitialise(PiGpioNativeImpl.java:91)
        at [email protected]/com.pi4j.library.pigpio.PiGpio.initialize(PiGpio.java:146)
        at [email protected]/com.pi4j.plugin.pigpio.provider.gpio.digital.PiGpioDigitalOutputProviderImpl.create(PiGpioDigitalOutputProviderImpl.java:60)
        at [email protected]/com.pi4j.plugin.pigpio.provider.gpio.digital.PiGpioDigitalOutputProviderImpl.create(PiGpioDigitalOutputProviderImpl.java:41)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at [email protected]/com.pi4j.provider.impl.ProviderProxyHandler.invoke(ProviderProxyHandler.java:100)
        at jdk.proxy1/com.sun.proxy.jdk.proxy1.$Proxy7.create(Unknown Source)
        at [email protected]/com.pi4j.context.Context.create(Context.java:317)
        at [email protected]/com.pi4j.internal.IOCreator.create(IOCreator.java:58)
        at [email protected]/com.pi4j.internal.IOCreator.create(IOCreator.java:96)
        at [email protected]/com.pi4j.internal.IOCreator.create(IOCreator.java:176)
        at [email protected]/com.gvc.Main.run(Main.java:62)
        at [email protected]/com.gvc.Main.main(Main.java:33)
11:30:14 [main] INFO com.pi4j.util.Console - Error: null
java.lang.reflect.UndeclaredThrowableException
        at jdk.proxy1/com.sun.proxy.jdk.proxy1.$Proxy7.create(Unknown Source)
        at [email protected]/com.pi4j.context.Context.create(Context.java:317)
        at [email protected]/com.pi4j.internal.IOCreator.create(IOCreator.java:58)
        at [email protected]/com.pi4j.internal.IOCreator.create(IOCreator.java:96)
        at [email protected]/com.pi4j.internal.IOCreator.create(IOCreator.java:176)
        at [email protected]/com.gvc.Main.run(Main.java:62)
        at [email protected]/com.gvc.Main.main(Main.java:33)
Caused by: java.lang.reflect.InvocationTargetException
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at [email protected]/com.pi4j.provider.impl.ProviderProxyHandler.invoke(ProviderProxyHandler.java:100)
        ... 7 more
Caused by: java.lang.UnsatisfiedLinkError: Pi4J was unable to extract and load the native library [/lib/armhf/libpi4j-pigpio.so] from the embedded resources inside this JAR [/home/pi/mystuff/mijnapp/dist/lib/pi4j-library-pigpio.jar]. to a temporary location on this system.  You can alternatively define the 'pi4j.library.path' system property to override this behavior and specify the library path.
        at [email protected]/com.pi4j.library.pigpio.util.NativeLibraryLoader.load(NativeLibraryLoader.java:170)
        at [email protected]/com.pi4j.library.pigpio.internal.PIGPIO.<clinit>(PIGPIO.java:74)
        at [email protected]/com.pi4j.library.pigpio.impl.PiGpioNativeImpl.gpioInitialise(PiGpioNativeImpl.java:91)
        at [email protected]/com.pi4j.library.pigpio.PiGpio.initialize(PiGpio.java:146)
        at [email protected]/com.pi4j.plugin.pigpio.provider.gpio.digital.PiGpioDigitalOutputProviderImpl.create(PiGpioDigitalOutputProviderImpl.java:60)
        at [email protected]/com.pi4j.plugin.pigpio.provider.gpio.digital.PiGpioDigitalOutputProviderImpl.create(PiGpioDigitalOutputProviderImpl.java:41)
        ... 12 more
11:30:14 [main] DEBUG com.pi4j.platform.impl.DefaultRuntimePlatforms - removed platform from managed platform map [id=raspberrypi; name=RaspberryPi Platform; class=com.pi4j.plugin.raspberrypi.platform.RaspberryPiPlatform]
11:30:14 [main] DEBUG com.pi4j.provider.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=pigpio-spi; name=PiGpio SPI Provider; class=com.sun.proxy.$Proxy5]
11:30:14 [main] DEBUG com.pi4j.provider.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=pigpio-pwm; name=PiGpio PWM Provider; class=com.sun.proxy.$Proxy0]
11:30:14 [main] DEBUG com.pi4j.provider.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=raspberrypi-spi; name=RaspberryPi SPI Provider; class=com.sun.proxy.$Proxy4]
11:30:14 [main] DEBUG com.pi4j.provider.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=raspberrypi-digital-output; name=RaspberryPi Digital Output (GPIO) Provider; class=com.sun.proxy.jdk.proxy1.$Proxy1]
11:30:14 [main] DEBUG com.pi4j.provider.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=raspberrypi-digital-input; name=RaspberryPi Digital Input (GPIO) Provider; class=com.sun.proxy.jdk.proxy1.$Proxy6]
11:30:14 [main] DEBUG com.pi4j.provider.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=pigpio-i2c; name=PiGpio I2C Provider; class=com.sun.proxy.$Proxy3]
11:30:14 [main] DEBUG com.pi4j.provider.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=pigpio-digital-output; name=PiGpio Digital Output (GPIO) Provider; class=com.sun.proxy.jdk.proxy1.$Proxy7]
11:30:14 [main] DEBUG com.pi4j.provider.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=raspberrypi-i2c; name=RaspberryPi I2C Provider; class=com.sun.proxy.$Proxy9]
11:30:14 [main] DEBUG com.pi4j.provider.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=pigpio-serial; name=PiGpio Serial Provider; class=com.sun.proxy.$Proxy8]
11:30:14 [main] DEBUG com.pi4j.provider.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=raspberrypi-pwm; name=RaspberryPi PWM Provider; class=com.sun.proxy.$Proxy11]
11:30:14 [main] DEBUG com.pi4j.provider.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=raspberrypi-serial; name=RaspberryPi Serial Provider; class=com.sun.proxy.$Proxy2]
11:30:14 [main] DEBUG com.pi4j.provider.impl.DefaultRuntimeProviders - removed provider from managed provider map [id=pigpio-digital-input; name=PiGpio Digital Input (GPIO) Provider; class=com.sun.proxy.jdk.proxy1.$Proxy10]
11:30:14 [main] DEBUG com.pi4j.runtime.impl.DefaultRuntime - Pi4J context/runtime successfully shutdown.'
[INFO] Executed tasks
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  5.167 s
[INFO] Finished at: 2021-09-19T11:30:14+02:00
[INFO] ------------------------------------------------------------------------

The code is trying to load a library through System.loadLibrary() (called in NativeLibraryLoader.java of the pigpio library) but it can't find /lib/armhf/libpigpio.so file. And indeed, there's no such directory created/generated in the /lib directory on the RPi.
I'm not a maven expert by any means (although I'm able to read an understand more or less what's going on...), but nowhere can I see in any of the pom.xml files an action that should copy the .so file(s) of pigpio (and maybe others too?) to that particular library location in the RPi root file system (/lib/....).

Is this a mistake or am I missing something?

Best rgds,
--Geert

eitch · 2021-09-19T20:18:51Z

eitch
Sep 19, 2021
Maintainer

With which archetype did you generate your project? I haven't found out how you generated your project, and using https://github.com/Pi4J/pi4j-example-minimal i was able run the application on a latest Raspberry Pi OS image using the following documentation: https://pi4j.com/getting-started/minimal-example-application/

2 replies

GeVanCo Sep 20, 2021
Author

@eitch :

I haven't found out how you generated your project

Hmmm... That's weird... It's mentioned as number 4. in the listed items in my original message...

This is the command I ran: mvn archetype:generate -DarchetypeCatalog=local like it is explained here and here on this page...

Again, note than I'm running this on my Windows machine and the target is a Raspberry Pi with the latest Raspbian image (Buster).

If you run that command, you get the following questionnaire on the command line (complete output given):

E:\AppData\VisualStudioCode\Java\pi4j_project>mvn archetype:generate -DarchetypeCatalog=local
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------< org.apache.maven:standalone-pom >-------------------
[INFO] Building Maven Stub Project (No POM) 1
[INFO] --------------------------------[ pom ]---------------------------------
[INFO]
[INFO] >>> maven-archetype-plugin:3.2.0:generate (default-cli) > generate-sources @ standalone-pom >>>
[INFO]
[INFO] <<< maven-archetype-plugin:3.2.0:generate (default-cli) < generate-sources @ standalone-pom <<<
[INFO]
[INFO]
[INFO] --- maven-archetype-plugin:3.2.0:generate (default-cli) @ standalone-pom ---
[INFO] Generating project in Interactive mode
[INFO] No archetype defined. Using maven-archetype-quickstart (org.apache.maven.archetypes:maven-archetype-quickstart:1.0)
Choose archetype:
1: local -> it.lb.rasp:raspimaven-archetype (raspimaven-archetype)
Choose a number or apply filter (format: [groupId:]artifactId, case sensitive contains): : 1
Define value for property 'groupId': com.gvc
Define value for property 'artifactId': ledapp
Define value for property 'version' 1.0-SNAPSHOT: : 1.0
Define value for property 'package' com.gvc: :
[INFO] Using property: main-class = Main
[INFO] Using property: project-name = Raspi Project
[INFO] Using property: useJavaPlatformModuleSystem = true
Confirm properties configuration:
groupId: com.gvc
artifactId: ledapp
version: 1.0
package: com.gvc
main-class: Main
project-name: Raspi Project
useJavaPlatformModuleSystem: true
 Y: : y
[INFO] ----------------------------------------------------------------------------
[INFO] Using following parameters for creating project from Archetype: raspimaven-archetype:1.0-SNAPSHOT
[INFO] ----------------------------------------------------------------------------
[INFO] Parameter: groupId, Value: com.gvc
[INFO] Parameter: artifactId, Value: ledapp
[INFO] Parameter: version, Value: 1.0
[INFO] Parameter: package, Value: com.gvc
[INFO] Parameter: packageInPathFormat, Value: com/gvc
[INFO] Parameter: project-name, Value: Raspi Project
[INFO] Parameter: package, Value: com.gvc
[INFO] Parameter: groupId, Value: com.gvc
[INFO] Parameter: artifactId, Value: ledapp
[INFO] Parameter: useJavaPlatformModuleSystem, Value: true
[INFO] Parameter: version, Value: 1.0
[INFO] Parameter: main-class, Value: Main
[WARNING] CP Don't override file E:\AppData\VisualStudioCode\Java\pi4j_project\ledapp\src\main\resources
[INFO] Executing META-INF/archetype-post-generate.groovy post-generation script
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.codehaus.groovy.reflection.CachedClass (file:/E:/AppData/MavenRepository/repository/org/codehaus/groovy/groovy/2.4.16/groovy-2.4.16.jar) t
o method java.lang.Object.finalize()
WARNING: Please consider reporting this to the maintainers of org.codehaus.groovy.reflection.CachedClass
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[INFO] Project created from Archetype in dir: E:\AppData\VisualStudioCode\Java\pi4j_project\ledapp
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  05:04 min
[INFO] Finished at: 2021-09-20T18:41:06+02:00
[INFO] ------------------------------------------------------------------------

As a 'gift', the following framework example Java file Main.java is automatically added/generated in the ./src directory of the new project:
Main.txt.

Note: I had to rename the .java file to .txt file, since .java files are apparently not supported to drag or upload...

When I then run the command mvn clean install antrun:run@exec, I get the error stack I posted in my initial message, the moment the command
var led = pi4j.create(ledConfig);
is to be executed on the RPi. This is on line 62 of the unmodified generated Main.java file.

Hope you will be able to reproduce now...

GeVanCo Sep 20, 2021
Author

@eitch

As a crosscheck, I also ran literally the minimal example from GitHub:

running mvn clean package
copying the content of target/distribution to the RPi
on the RPi, ran the command ./run.sh

Guess what? Exactly the same error as I have with the other project. To be honest, I would have surprised me if I would not have had the same issue...

This is the output when running the app on the RPi:

[main] INFO com.pi4j.util.Console - ************************************************************
[main] INFO com.pi4j.util.Console - ************************************************************
[main] INFO com.pi4j.util.Console -
[main] INFO com.pi4j.util.Console -                   <-- The Pi4J Project -->
[main] INFO com.pi4j.util.Console -                    Minimal Example project
[main] INFO com.pi4j.util.Console -
[main] INFO com.pi4j.util.Console - ************************************************************
[main] INFO com.pi4j.util.Console - ************************************************************
[main] INFO com.pi4j.util.Console -
[main] INFO com.pi4j.Pi4J - New auto context
[main] INFO com.pi4j.Pi4J - New context builder
[main] INFO com.pi4j.platform.impl.DefaultRuntimePlatforms - adding platform to managed platform map [id=raspberrypi; name=RaspberryPi Platform; priority=5; class=com.pi4j.plugin.raspberrypi.platform.RaspberryPiPlatform]
[main] INFO com.pi4j.util.Console - --------------------
[main] INFO com.pi4j.util.Console - |  Pi4J PLATFORMS  |
[main] INFO com.pi4j.util.Console - --------------------
[main] INFO com.pi4j.util.Console -
PLATFORMS: [1] "Pi4J Runtime Platforms" <com.pi4j.platform.impl.DefaultPlatforms>
└─PLATFORM: "RaspberryPi Platform" {raspberrypi} <com.pi4j.plugin.raspberrypi.platform.RaspberryPiPlatform> {Pi4J Platform for the RaspberryPi series of products.}
[main] INFO com.pi4j.util.Console -
[main] INFO com.pi4j.util.Console - ---------------------------
[main] INFO com.pi4j.util.Console - |  Pi4J DEFAULT PLATFORM  |
[main] INFO com.pi4j.util.Console - ---------------------------
[main] INFO com.pi4j.util.Console -
PLATFORM: "RaspberryPi Platform" {raspberrypi} <com.pi4j.plugin.raspberrypi.platform.RaspberryPiPlatform> {Pi4J Platform for the RaspberryPi series of products.}
[main] INFO com.pi4j.util.Console -
[main] INFO com.pi4j.util.Console - --------------------
[main] INFO com.pi4j.util.Console - |  Pi4J PROVIDERS  |
[main] INFO com.pi4j.util.Console - --------------------
[main] INFO com.pi4j.util.Console -
PROVIDERS: [12] "I/O Providers" <com.pi4j.provider.impl.DefaultProviders>
├─PWM: [2] <com.pi4j.io.pwm.PwmProvider>
│ ├─PROVIDER: "PiGpio PWM Provider" {pigpio-pwm} <com.pi4j.plugin.pigpio.provider.pwm.PiGpioPwmProviderImpl> {com.pi4j.plugin.pigpio.provider.pwm.PiGpioPwmProviderImpl}
│ └─PROVIDER: "RaspberryPi PWM Provider" {raspberrypi-pwm} <com.pi4j.plugin.raspberrypi.provider.pwm.RpiPwmProviderImpl> {com.pi4j.plugin.raspberrypi.provider.pwm.RpiPwmProviderImpl}
├─I2C: [2] <com.pi4j.io.i2c.I2CProvider>
│ ├─PROVIDER: "RaspberryPi I2C Provider" {raspberrypi-i2c} <com.pi4j.plugin.raspberrypi.provider.i2c.RpiI2CProviderImpl> {com.pi4j.plugin.raspberrypi.provider.i2c.RpiI2CProviderImpl}
│ └─PROVIDER: "PiGpio I2C Provider" {pigpio-i2c} <com.pi4j.plugin.pigpio.provider.i2c.PiGpioI2CProviderImpl> {com.pi4j.plugin.pigpio.provider.i2c.PiGpioI2CProviderImpl}
├─SPI: [2] <com.pi4j.io.spi.SpiProvider>
│ ├─PROVIDER: "PiGpio SPI Provider" {pigpio-spi} <com.pi4j.plugin.pigpio.provider.spi.PiGpioSpiProviderImpl> {com.pi4j.plugin.pigpio.provider.spi.PiGpioSpiProviderImpl}
│ └─PROVIDER: "RaspberryPi SPI Provider" {raspberrypi-spi} <com.pi4j.plugin.raspberrypi.provider.spi.RpiSpiProviderImpl> {com.pi4j.plugin.raspberrypi.provider.spi.RpiSpiProviderImpl}
├─SERIAL: [2] <com.pi4j.io.serial.SerialProvider>
│ ├─PROVIDER: "PiGpio Serial Provider" {pigpio-serial} <com.pi4j.plugin.pigpio.provider.serial.PiGpioSerialProviderImpl> {com.pi4j.plugin.pigpio.provider.serial.PiGpioSerialProviderImpl}
│ └─PROVIDER: "RaspberryPi Serial Provider" {raspberrypi-serial} <com.pi4j.plugin.raspberrypi.provider.serial.RpiSerialProviderImpl> {com.pi4j.plugin.raspberrypi.provider.serial.RpiSerialProviderImpl}
├─DIGITAL_OUTPUT: [2] <com.pi4j.io.gpio.digital.DigitalOutputProvider>
│ ├─PROVIDER: "PiGpio Digital Output (GPIO) Provider" {pigpio-digital-output} <com.pi4j.plugin.pigpio.provider.gpio.digital.PiGpioDigitalOutputProviderImpl> {com.pi4j.plugin.pigpio.provider.gpio.digital.PiGpioDigitalOutputProviderImpl}
│ └─PROVIDER: "RaspberryPi Digital Output (GPIO) Provider" {raspberrypi-digital-output} <com.pi4j.plugin.raspberrypi.provider.gpio.digital.RpiDigitalOutputProviderImpl> {com.pi4j.plugin.raspberrypi.provider.gpio.digital.RpiDigitalOutputProviderImpl}
├─ANALOG_INPUT: [0] <com.pi4j.io.gpio.analog.AnalogInputProvider>
├─ANALOG_OUTPUT: [0] <com.pi4j.io.gpio.analog.AnalogOutputProvider>
└─DIGITAL_INPUT: [2] <com.pi4j.io.gpio.digital.DigitalInputProvider>
  ├─PROVIDER: "PiGpio Digital Input (GPIO) Provider" {pigpio-digital-input} <com.pi4j.plugin.pigpio.provider.gpio.digital.PiGpioDigitalInputProviderImpl> {com.pi4j.plugin.pigpio.provider.gpio.digital.PiGpioDigitalInputProviderImpl}
  └─PROVIDER: "RaspberryPi Digital Input (GPIO) Provider" {raspberrypi-digital-input} <com.pi4j.plugin.raspberrypi.provider.gpio.digital.RpiDigitalInputProviderImpl> {com.pi4j.plugin.raspberrypi.provider.gpio.digital.RpiDigitalInputProviderImpl}
[main] INFO com.pi4j.util.Console -
[main] ERROR com.pi4j.library.pigpio.util.NativeLibraryLoader - Unable to load [libpi4j-pigpio.so] using path: [/lib/armhf/libpi4j-pigpio.so]
java.lang.UnsatisfiedLinkError: /tmp/libpi4j-pigpio13198577432575361988.so: libpigpio.so.1: cannot open shared object file: No such file or directory
        at java.base/java.lang.ClassLoader$NativeLibrary.load0(Native Method)
        at java.base/java.lang.ClassLoader$NativeLibrary.load(ClassLoader.java:2442)
        at java.base/java.lang.ClassLoader$NativeLibrary.loadLibrary(ClassLoader.java:2498)
        at java.base/java.lang.ClassLoader.loadLibrary0(ClassLoader.java:2694)
        at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2627)
        at java.base/java.lang.Runtime.load0(Runtime.java:768)
        at java.base/java.lang.System.load(System.java:1837)
        at [email protected]/com.pi4j.library.pigpio.util.NativeLibraryLoader.loadLibraryFromClasspath(NativeLibraryLoader.java:221)
        at [email protected]/com.pi4j.library.pigpio.util.NativeLibraryLoader.load(NativeLibraryLoader.java:162)
        at [email protected]/com.pi4j.library.pigpio.internal.PIGPIO.<clinit>(PIGPIO.java:74)
        at [email protected]/com.pi4j.library.pigpio.impl.PiGpioNativeImpl.gpioInitialise(PiGpioNativeImpl.java:91)
        at [email protected]/com.pi4j.library.pigpio.PiGpio.initialize(PiGpio.java:146)
        at [email protected]/com.pi4j.plugin.pigpio.provider.gpio.digital.PiGpioDigitalOutputProviderImpl.create(PiGpioDigitalOutputProviderImpl.java:60)
        at [email protected]/com.pi4j.plugin.pigpio.provider.gpio.digital.PiGpioDigitalOutputProviderImpl.create(PiGpioDigitalOutputProviderImpl.java:41)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at [email protected]/com.pi4j.provider.impl.ProviderProxyHandler.invoke(ProviderProxyHandler.java:100)
        at jdk.proxy1/com.sun.proxy.jdk.proxy1.$Proxy7.create(Unknown Source)
        at [email protected]/com.pi4j.context.Context.create(Context.java:317)
        at [email protected]/com.pi4j.internal.IOCreator.create(IOCreator.java:58)
        at [email protected]/com.pi4j.internal.IOCreator.create(IOCreator.java:96)
        at [email protected]/com.pi4j.internal.IOCreator.create(IOCreator.java:176)
        at [email protected]/com.pi4j.example.MinimalExample.main(MinimalExample.java:115)
Exception in thread "main" java.lang.reflect.UndeclaredThrowableException
        at jdk.proxy1/com.sun.proxy.jdk.proxy1.$Proxy7.create(Unknown Source)
        at [email protected]/com.pi4j.context.Context.create(Context.java:317)
        at [email protected]/com.pi4j.internal.IOCreator.create(IOCreator.java:58)
        at [email protected]/com.pi4j.internal.IOCreator.create(IOCreator.java:96)
        at [email protected]/com.pi4j.internal.IOCreator.create(IOCreator.java:176)
        at [email protected]/com.pi4j.example.MinimalExample.main(MinimalExample.java:115)
Caused by: java.lang.reflect.InvocationTargetException
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at [email protected]/com.pi4j.provider.impl.ProviderProxyHandler.invoke(ProviderProxyHandler.java:100)
        ... 6 more
Caused by: java.lang.UnsatisfiedLinkError: Pi4J was unable to extract and load the native library [/lib/armhf/libpi4j-pigpio.so] from the embedded resources inside this JAR [/home/pi/mystuff/ledapp/./pi4j-library-pigpio-2.0.jar]. to a temporary location on this system.  You can alternatively define the 'pi4j.library.path' system property to override this behavior and specify the library path.
        at [email protected]/com.pi4j.library.pigpio.util.NativeLibraryLoader.load(NativeLibraryLoader.java:170)
        at [email protected]/com.pi4j.library.pigpio.internal.PIGPIO.<clinit>(PIGPIO.java:74)
        at [email protected]/com.pi4j.library.pigpio.impl.PiGpioNativeImpl.gpioInitialise(PiGpioNativeImpl.java:91)
        at [email protected]/com.pi4j.library.pigpio.PiGpio.initialize(PiGpio.java:146)
        at [email protected]/com.pi4j.plugin.pigpio.provider.gpio.digital.PiGpioDigitalOutputProviderImpl.create(PiGpioDigitalOutputProviderImpl.java:60)
        at [email protected]/com.pi4j.plugin.pigpio.provider.gpio.digital.PiGpioDigitalOutputProviderImpl.create(PiGpioDigitalOutputProviderImpl.java:41)
        ... 11 more

So, exactly the same issue, exactly the same library that is not found: libpi4j-pigpio.so in /lib/armhf.

Let me know if more input is needed.

GeVanCo · 2021-09-26T09:23:24Z

GeVanCo
Sep 26, 2021
Author

Solved it the following way:

Installed the pigpio lib following the build instructions here

One thing still puzzles me: I still see the following debug output lines:

10:58:05 [main] DEBUG com.pi4j.library.pigpio.util.NativeLibraryLoader - Attempting to load library [libpi4j-pigpio.so] using path: [/lib/armhf/libpi4j-pigpio.so]
10:58:05 [main] DEBUG com.pi4j.library.pigpio.util.NativeLibraryLoader - Library [libpi4j-pigpio.so] loaded successfully using embedded resource file: [/lib/armhf/libpi4j-pigpio.so]
10:58:05 [main] DEBUG com.pi4j.library.pigpio.impl.PiGpioNativeImpl - [INITIALIZE] -- INITIALIZED SUCCESSFULLY

However, there's not any file located in /lib/armhf. So, how does this work?

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