OpenSprinkler › Forums › Hardware Questions › OpenSprinkler Pi (OSPi) › Control OSPi with arduino? › Reply To: Control OSPi with arduino? May 20, 2015 at 1:36 pm #37836 RayKeymaster It’s possible but will be a lot of work. The OSPi schematic is all available in Github. But before you start, have you tried to use wired Ethernet with RPi, which is generally more reliable than WiFi?