Abstract: A system for controlling farm operations including: (a) a controller configured to activate an aeration fan for aeration of grain stored in a storage bin, the controller comprising a wireless transmitter and a wireless receiver; and (b) a peripheral unit in communication with the controller, the peripheral unit comprising a base unit and an interchangeable daughter board, the base unit comprising a microcontroller, a printed circuit board, a power source, a wireless transmitter, and a wireless receiver, the daughter board configured to provide functionality specific to a selected application. The controller is further configured to wirelessly communicate with a mobile electronic device without requiring a central computer intermediary, to accept input from the mobile electronic device as a duplicate of a human-machine interface, and to push a notification to the mobile electronic device regarding a status of the aeration fan.