Update:

Ok, all commands work now after some reading in the Pi forums. I had to run:

echo "18" > /sys/class/gpio/export

Then, I have successfully toggle the led.

And ezbpi server can toggle the gpio18 / port 18?

No, no success with ARC via the ezbpi server...

One question the led should switch ON with digital ON or digital OFF ?

On the EZB v4, the led is switched ON with digital ON.

There was an issue with setting the pin to LOW and also with reading its value. I tested it and it works now (port mappings are GPIOX <> DX as already mentioned). I have uploaded a new version 5 here https://synthiam.com/Firmware/EZBPi-Server-SXQJXC3FIQ5.

Please give it a try and let me know how it goes.

Hi Amin,

Thanks for your help and the new firmware. Sadly, it is not working and I still cannot switch ON the led.

When I add the "read digital" control on the same port 18, it doesn't go green when i put the "set digital" ON.  Moreover, when I put the "read digital" control on the same port than "set digital" control, this later does not stay green when I click on it and go back to red immediately. I don't know if that makes ant sense to you...

@fredebec

Please post the output of the following commands:

cat /sys/firmware/devicetree/base/model

cat /proc/cpuinfo

cat /etc/os-release

uname -a

gpio -v

pip show rpi.gpio