Sorry about the issue. There is a bug in the current firmware 2.1.7 for OS 3.0 that makes it ignore the static IP setting. The fix is actually pretty easy (and we’ve just fixed this for OpenGarage recently). In the meantime, please consider using your router’s DHCP reservation feature (most routers support this feature). You can bind a fixed IP to your OpenSprinkler’s MAC address, and the router will guarantee to assign the same fixed IP to OpenSprinkler. You can also set a static IP out of your normal DHCP IP range.