Several embodiments provide wireless extensions to an irrigation
controller system and related methods of use, as well as other
improvements to irrigation control equipment. In one implementation, an
irrigation control system includes a transmitter unit including a
controller and having a connector to be coupled to an irrigation
controller having station actuation output connectors. The controller is
configured to receive an indication that the irrigation controller has
activated an irrigation station, and is also configured to cause the
transmitter unit to transmit a wireless activation signal responsive to
the indication. A receiver unit is coupled to an actuator coupled to an
actuatable device, such as an irrigation valve, the actuator configured
to actuate the irrigation valve to control the flow of water
therethrough. The receiver unit receives the wireless activation signal
and in response, causes the actuator to actuate the actuatable device.