Unable to open GPIO direction interface for pin

[zhouhuabin]

I was using pi4j 1.3 to test Gpio examples on raspberry 4b, but i can not export the pin 3,7,28 with RaspiPinNumberingScheme.DEFAULT_PIN_NUMBERING,other pin number is ok. and i run command in /sys/classes/gpio echo 7 > export is also ok. i can not understand why this happen!
output:
platform:RASPBERRYPI
<--Pi4J--> GPIO test program
version:1.3
Exception in thread "main" java.lang.RuntimeException: Unable to open GPIO direction interface for pin [7]: No such file or directory
at com.pi4j.wiringpi.GpioUtil.export(Native Method)
at WiringPiGpioExample.main(WiringPiGpioExample.java:83)

main code is:
URLClassLoader cl = (URLClassLoader) (com.pi4j.platform.PlatformManager.class.getClassLoader());
URL url = cl.findResource("META-INF/MANIFEST.MF");
Manifest manifest = new Manifest(url.openStream());
Attributes attributes = manifest.getMainAttributes();
String version = attributes.getValue("Bundle-Version");//Implementation-
System.out.println("version:"+version);
// setup wiringPi
if (Gpio.wiringPiSetup() == -1) {
System.out.println(" ==>> GPIO SETUP FAILED");
return;
}
GpioFactory.setDefaultProvider(new RaspiGpioProvider(RaspiPinNumberingScheme.DEFAULT_PIN_NUMBERING));
// set GPIO 4 as the input trigger
GpioUtil.export(7, GpioUtil.DIRECTION_IN);
GpioUtil.setEdgeDetection(7, GpioUtil.EDGE_BOTH);
Gpio.pinMode (7, Gpio.INPUT) ;
Gpio.pullUpDnControl(7, Gpio.PUD_DOWN);

[jmspaggi]

Him I think I'm facing something similar. Did you resolve your issue?

[FDelporte]

Are you using WiringPi or BCM numbers?
Seel also my comment on #107

[jmspaggi]

Will reply there.

[zhouhuabin]

Him, I resolved my issue , and avoid using gpio.provisionDigitalInputPin method : gpio.provisionDigitalInputPin(RaspiBcmPin.GPIO_22, "input",PinPullResistance.PULL_UP); I just use Gpio.pinMode(bcm_TiltPin, Gpio.INPUT); then read value like this: int value = Gpio.digitalRead(bcm_TiltPin); not use : int value = aihome_tiltPin.getState().getValue(); Good luck! ***@***.*** From: jmspaggi Date: 2021-06-04 01:06 To: Pi4J/pi4j-v2 CC: 周华彬; Author Subject: Re: [Pi4J/pi4j-v2] Unable to open GPIO direction interface for pin (#79) Him I think I'm facing something similar. Did you resolve your issue? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe.