I recently purchased the OSPI board to mount the Raspberry Pi. I am looking to replace my hunter sprinkler system.
My system has 6 zone valves and one Main valve. For a zone to be turned ON, the zone valve and main valve must be ON.
I am not sure how i can connect the Main valve to the OSPi. Should it just be connected as one of the ports ? Then how do i configure the programs (say the interval program) to turn ON this valve too every time a zone valve is activated ?