PI4J - Unable to load [libpi4j.so] using path

Question

I'm using NetBeans on MacOS to develop an application using PI4J. Everything looks Ok but I get the error below, saying that PI4J was unable to load. Does anyone know how to solve this?

abr 18, 2015 3:02:30 PM com.pi4j.util.NativeLibraryLoader load
SEVERE: Unable to load [libpi4j.so] using path: [/lib/libpi4j.so]
java.lang.UnsatisfiedLinkError: /private/var/folders/0x/6rph2scs0f544b7xwkfhzkcw0000gn/T/libpi4j3968879292977354112.so: dlopen(/private/var/folders/0x/6rph2scs0f544b7xwkfhzkcw0000gn/T/libpi4j3968879292977354112.so, 1): no suitable image found.  Did find:
    /private/var/folders/0x/6rph2scs0f544b7xwkfhzkcw0000gn/T/libpi4j3968879292977354112.so: unknown file type, first eight bytes: 0x7F 0x45 0x4C 0x46 0x01 0x01 0x01 0x00
    at java.lang.ClassLoader$NativeLibrary.load(Native Method)
    at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1937)
    at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1822)
    at java.lang.Runtime.load0(Runtime.java:809)
    at java.lang.System.load(System.java:1086)
    at com.pi4j.util.NativeLibraryLoader.loadLibraryFromClasspath(NativeLibraryLoader.java:143)
    at com.pi4j.util.NativeLibraryLoader.load(NativeLibraryLoader.java:92)
    at com.pi4j.wiringpi.Gpio.<clinit>(Gpio.java:174)
    at com.pi4j.io.gpio.RaspiGpioProvider.<init>(RaspiGpioProvider.java:51)
    at com.pi4j.io.gpio.GpioFactory.getDefaultProvider(GpioFactory.java:106)
    at com.pi4j.io.gpio.impl.GpioControllerImpl.<init>(GpioControllerImpl.java:54)
    at com.pi4j.io.gpio.GpioFactory.getInstance(GpioFactory.java:89)
    at hellorasp.HelloRasp.main(HelloRasp.java:31)

Exception in thread "main" java.lang.UnsatisfiedLinkError: com.pi4j.wiringpi.Gpio.wiringPiSetup()I
    at com.pi4j.wiringpi.Gpio.wiringPiSetup(Native Method)
    at com.pi4j.io.gpio.RaspiGpioProvider.<init>(RaspiGpioProvider.java:51)
    at com.pi4j.io.gpio.GpioFactory.getDefaultProvider(GpioFactory.java:106)
    at com.pi4j.io.gpio.impl.GpioControllerImpl.<init>(GpioControllerImpl.java:54)
    at com.pi4j.io.gpio.GpioFactory.getInstance(GpioFactory.java:89)
    at hellorasp.HelloRasp.main(HelloRasp.java:31)

Answer 1

/lib/libpi4j.so文件无法正常工作，因为它仅适用于Raspberry Pi，而不是任何其他硬件。

Answer 2

只需将libpi4j.so复制到RPI上的项目lib文件夹即可

Answer 3

assuming the OP is running his code on a raspberry pi, I also got this error on a pi running code that controlled servos that worked as of Feb-2018 but produced this exact error in Jul-2018. I found a change in the pi4j 1.2 distro needs you to install the wiringpi library manually

so i got that exact error, followed these instructions and my servos are moving again:

http://wiringpi.com/download-and-install/

Answer 4

sudo apt-get remove wiringpi -y sudo apt-get --yes install git-core gcc make cd ~ git clone https://github.com/WiringPi/WiringPi --branch master --single-branch wiringpi cd ~/wiringpi sudo ./build

This is taken from pi4j I faced this issue and when I executed these lines in terminal...everything worked perfectly

Answer 5

I faced the same issue working with Raspberry P4, java 11 and pi4j v2. I solved it downloading pigpio library directly from the raspberry

sudo apt-get install pigpio

After the library was installed, the jar worked perfecrly

Answer 6

We are beginners on raspberry pi and we want to use the pi4j library. The example program compiles but does not run :

GRAVE: Unable to load [libpi4j] using path: [/lib/raspberrypi/dynamic/libpi4j-armhf.so]

Does anyone know how to solve this?