First, just to be sure we are on the same page: you have the Raspberry Pi-based OpenSprinkler (OSPi), is that right? You are posting this question under OSPi so I assume you have OSPi. If you have the fully-assembled, microcontroller-based OpenSprinkler, the first thing to check is whether your router has Internet connection. The reason is that the microcontorller-based OpenSprinkler references external Javascripts stored on remote servers. If your router does not have Internet connection, you can still use the OpenSprinkler mobile app (or Chrome app) to access it.