Agricultural and Arduino enthusiast 'ljlukkar' has been working on an Arduino and web-controlled hydroponics system that introduces a large amount of automation and data capture to the process. Although the creator considers it to be a work-in-progress, the system has control via Ethernet and a web interface, logs relevant data, can control fluid pumps, measure pH and EC levels in the solution - and more. The following video is a run-through of the control interface:
The designers of the HydroBot used a seperate Arduino Mega and Ethernet shield - however when making your own Hydrobot save space, money and time by using the Freetronics EtherMega:
Quite simple the EtherMega is the fully-loaded Arduino-compatible board on the market today. Apart from being completely Arduino Mega2560-compatible, it includes full Ethernet interface, a microSD card socket, full USB interface, optional Power-over-Ethernet support and still has a circuit prototyping area with extra I2C interface pins. So if your project is breaking the limits, upgrade to the EtherMega today.