I didn’t explain correctly, I don’t have opensprinkler pi hardware, I only have a raspberry pi running the ospi firmware connected to relay cards, using gpio. I need 25 stations and I can use only 18 GPIO’s. I have a “Mega-IO card” (https://www.sequentmicrosystems.com/megaio.html) witch is stackable on raspberry pi and responds to I2C commands. Is it possible to give I2C commands from opensprinkler pi firmware as i think you do in Esp8266 based opensprinkler? Or can I use linux command line instruction inside opensprinkler firmware, as the card have is own software that responds to linux commands like for example “megaio 0 rwrite 1 1”? Can I use HTML type stations to give a linux command?