This was answered on Hackster.io but I copied the response here in case others find it here first...
Q: Where did you get the cables, especially the 3 wire connector to the Shield?
You can buy the connector at Sprinker Warehouse. You can also just use wires directly between the screw terminals on the Hunter Shield and the control panel.
Q: How do I connect the Air to my WAP?
A: Follow the Quick Start Guide. Basically, you connect to the Esquilo's WiFi with a PC or mobile device, open a web browser to 10.10.10.1, and enter your WiFi network credentials.
Q: How do I bring up the IDE from a web browser?
A: Your Esquilo's IP address is displayed during one of the steps in the Quick Start Guide. You can also browse to Find my Esquilo to find your IP.
Q: Once i get that working, how do I build the web interface for a mobile version?
A: Insert a micro SD card into your Esquilo, open the IDE, and select "Synchronize SD card library" from the Squirrel menu. The menu is opened by hovering over the top right corner of the IDE window. In the file list, navigate to lib/demos/sprinkler and open remote.nut and remote.html. With the remote.nut tab open, click "Run Nut" on the tool bar at top. Then select the remote.html tab and click "Open in New Window" on the tool bar. You should be in business at that point. You can now customize remote.nut for your zones and run it again.