Hello,

I have problem to control GPIO pins on Raspberry Pi 4.
I use latest CODESYS runtime Version 3.5.16.10.

I can control GPIO from RPi 4 system (e.g. Python code), but not from CODESYS.
I tried older runtime Versions too, another RPi 4 device, but nothing helps.

On Raspberry 3B+ function everething without problem.

Did You tried this or do You how to solve this issue?

Thanks.

Hello,
I also have the same problem. On the raspberry pi4 model B, the GPIOs controlled with Codesys do not work while if controlled with Python scripts they work correctly. Can someone help me?
Thanks.

Hello,
I solved this issue with use of new CODESYS runtime V3.5.16.20.
There I used new GPIO driver: "GPIOs B+/Pi2". (The older was named "GPIOs A/B" and worked me only on RPi3B+).
Lubos

But to enable the GPIO working with codesys, on raspberry I have to configure something? Upgrading to that version still doesn't work for me.

Here is detailed picture how to change GPIO control... Update Device for GPIO:

thank you for the help but even doing the update (as you showed in the figure) the result does not change. I am really so sorry because i thought it worked without problems.

OK, can be, that You have another Problem.. but this need more description of Your issue..

In Raspbian is neccessary to allow control of GPIO in "Interfaces - Raspberry Pi Configuration". I hope, this You have set if You uses Python.

Which CODESYS and runtime version do You use?
Do You set outputs or read inputs?
Can You send some printscreens or whole project is best...

Sorry to butt in here.
I had same problem to control GPIO on Raspberry Pi 4,
but I have solved it fortunately.

The following is just for your information.
In my case, it is solved by downgrading Raspberry Pi OS.
What I did was reinstall Raspberry Pi OS by using old Image
(2020-02-05-raspbian-buster.zip) downloading from Raspberry
Pi Site and didn't update module while I was installing the OS.

My Raspberry Pi 4 is ...
pi@raspberrypi:~ $ cat /proc/device-tree/model
Raspberry Pi 4 Model B Rev 1.4

• My environment which GPIO is working
  Codesys Control for Rasberry Pi 3.5.16.20
  Raspberry Pi OS : debian_version 10.2
  (displayed by following command)
  pi@raspberrypi:~ $ cat /etc/debian_version
  10.2

• My environment which GPIO did not work
  Codesys Control for Rasberry Pi 3.5.16.20
  Raspberry Pi OS ：debian_version 10.4
  (displayed by following command)
  pi@raspberrypi:~ $ cat /etc/debian_version
  10.4

I’m using codesys control v4.0.0.0 with Debian version 10.4 and also do not have functioning GPIOs.
To codesys, when will this be fixed to avoid having to downgrade Debian?

as far as I know, this works with current version and current RaspberryPI OS... you just need to select the PB+/PI2 GPOI's

I’ve tried using the example GPIO project with a flashing output on GPIO23 with no success. I’m conscious that Tomj’s response was only a few months ago. Was v4.0.0.0 intended to fix the issue to support Debian v10.4?

There was no change on CODESYS side...Just plug the right connector PIB+/P2

I have been using the PiB+/P2 without success.

Using latest Raspberry Pi OS (11th Januar Image) should solve it for sure...
https://www.raspberrypi.org/software/operating-systems/