If anyone can help me on this that wile be much appreciated: 1) I create a new install of PI OS 2) I install domoticz using ' sudo bash -c "$(curl -sSfL https://install.domoticz.com)" ' 4 ) I add folowing lines to the end of /etc/init.d/domoticz.sh : echo 538 > /sys/class/gpio/export echo out > /sys ...

Ok, then it might just be me. I tired to run the sysfs commands in the terminal and that only worked if I added 512 to the required number. and if I did so finally something appeared in domoticz (see screenshot above) But now I installed an older version of pi os with kernel 6.1 to be sure. and now ...

The method as described in the wiki doesn't work anymore that is what this topic is all about.
as akamming writes above you should make a dummy switch and create some scripting

How do you make this dummy button? I created a dummy in hardware and when I try to manually create a switch and select this dummy as hardware and Sysfs GPIO as type gpio516-input appears in the Sysfs GPIO field, but when I try to add the device I get the message: "undefined" https://live ...