Just sitting there is not a bad thing, it means no error is being output.
What IP are you trying and is the computer on the same network that you are attempting to connect with?
When you run: ifconfig what IP do you see? Is this the IP you are using?
You are welcome to try the upcoming 2.1.6 update (which currently does output some debug information) by doing the following clone command to see if anything changes:
git clone -b 2.1.6 https://github.com/OpenSprinkler/OpenSprinkler-Firmware