@Queasy Hi, I will try to take a closer look at the problem in the next days. I do not have a setup with Debian 13 at the moment and it will take me some time. Did not test 2.x of open gpio yet. Maybe the api changed. Make sure you set up the pull-up/pull-down resistor like described in this description https://www.raspberrypi.com/documentation/computers/config_txt.html#gpio-control