Hello, I figured out that in order to use the pull up/down resistors on an RPI, using libgpiod one would need to have a kernel version 5.5.0 or greater. I belive currently we are at 5.42, with 7.8.2003 ? Is there gong to be a 5.5.x kernel in a later version of Centos 7.x or is that going to be a Centos 8 'thing'? Ron