The hydroMazing controller is designed to operate ventilation fans for air circulation, water pumps, occasionally a humidifier, heaters, or any other appliance that is necessary to maintain an ideal environment for plants to grow.  Typically, we DIY'ers would hook-up some relays to a microcontroller to achieve control.  However, with hydroMazing, the system uses remote controlled wireless AC outlets, ensuring safer control than traditional relays.  hydroMazing uses low-cost open-hardware modules and the ubiquitous microcontroller, the Atmega328, on an Arduino Nano*, offering the flexibility of customization and expansion. The sensor choices are endless, but I’ve narrowed it down to a few important and relatively inexpensive modules.  A temperature and relative-humidity sensor, moisture sensors for soil, liquid temperature probe for hydroponics, a simple photocell.  There are many other optional additions including the float switch or switches and flow-rate sensors.