B4J Question Raspberry Pi 4B GPIO Not working

[fredeady]

I can't get an LED to toggle on any of the Pi's GPIO pins.
I see that Gordon has updated wiredPi but no longer supports it.
I loaded his latest version 2.52 on the Pi. Buster comes with 2.50.
I loaded up the Debian Pi4J jar on the Pi and am using the B4J library.
I feel sort of dumb as I can't seem to make this work.
I know I'm missing something. My Pi is running Buster. I can toggle
the LED using Python. I am currently trying to toggled GPIO 27, which is
physical pin 13. Thanks for any enlightenment.

 

[Erel]

The situation with Pi4J / WiringPi and Raspberry Pi 4 is not very good as the developer of WiringPi stopped developing it.

However I'm able to control a led with RPi 4.

Steps I followed:

• Update wiring pi: http://wiringpi.com/wiringpi-updated-to-2-52-for-the-raspberry-pi-4b/
• Install Java 8:
  

  sudo apt update
  sudo apt install openjdk-8-jdk

• Run b4j-bridge without sudo. It doesn't work with sudo for some reason. You might need to first delete tempjars.
  

  java -jar b4j-bridge.jar

Sub Process_Globals
    Private controller As GpioController
    Private p As GpioPinDigitalOutput
End Sub

Sub AppStart (Args() As String)
    Log("test")
    controller.Initialize
    p.Initialize(15, False)
    test
    StartMessageLoop
End Sub

Sub test
    Dim b As Boolean
    Do While True
        p.State = b
        b = Not(b)
        Log(b)
        Sleep(1000)
    Loop
End Sub

Pins: https://pi4j.com/1.2/pins/model-b-plus.html

 

[fredeady]

Hi, Erel
Thank you very much!
For the record, I was using Java 11 and the sudo command.
Thought I was losing it

 

[Erel]

It also took me a while to get it working.

 

[fordsman]

Hi
Get this:
Unable to determine hardware version. I see: Hardware : BCM2711

Is there a workaround?

 

[Erel]

Please start a new thread and provide more information.