The lights and auto-fish feeder are up and running and a Raspberry Pi has been tasked with taking pictures several times a day and uploading them to Twitter so we can check in on our system no matter where we are. We used this tutorial to make that happen. You can check out the Twitter feed here via @UrbanAgBKK.
Additionally, we've begun working on a soil moisture sensor. So far it is a simple LED display letting you know basically if its moist, semi-moist, or totally dry and it works pretty good. We made it following this tutorial on Instructables. You might want to add in some resistors to protect your LEDs and your Arduino.
Next we've got to hook it up to either Twitter or an automated irrigation system. Beyond that, we'd like to also create a water condenser to pull water from the air and fill a reservoir for the system used by the automated irrigation system. Then finally, we'd like to make it all solar powered. Possible? We don't know but that's part of the fun ... finding out.