Programmable irrigation controller having user interface

1. An irrigation control system, comprising:

an irrigation controller comprising:

a housing;

a microcontroller within the housing and configured to store and execute an irrigation schedule; and

a valve driver within the housing and coupled to the microcontroller and configured to output a zone activation signal to an actuatable zone valve in response to signaling from the microcontroller; and

a user interface remote from the housing and coupled to the irrigation controller, the user interface comprising:

a plurality of user input devices configured to allow the user to create and modify an irrigation schedule; and

a user display comprising a display screen and configured to display irrigation parameters associated with the irrigation schedule, and configured to display, for a single irrigation zone, all system variables associated with the irrigation schedule together to the user without further user manipulation of the user interface, the irrigation schedule corresponding to the single irrigation zone,

wherein the all system variables comprise an irrigation start day, an irrigation start time, watering frequency per irrigation start day, and a duration associated with the irrigation schedule.

2. The system of claim 1 , wherein the user display includes a plurality of illuminatable indicators.

3. The system of claim 1 , wherein the user interface includes a rotary dial.

4. The system of claim 1 wherein the user interface is coupled to the irrigation controller via a communication link, the communication link comprising a wireless communication link.

5. The system of claim 1 wherein the user interface is part of a general purpose computing device.

6. The system of claim 1 wherein the user display is configured to simultaneously display the all system variables associated with the irrigation schedule together to the user.

7. An irrigation control system, comprising:

an irrigation controller comprising:

a housing;

a microcontroller within the housing and configured to store and execute an irrigation schedule; and

a valve driver within the housing and coupled to the microcontroller and configured to output a zone activation signal to an actuatable zone valve in response to signaling from the microcontroller; and

a user interface remote from the housing and coupled to the irrigation controller, the user interface comprising:

a plurality of user input devices configured to allow the user to create and modify an irrigation schedule; and

a user display comprising a display screen and configured to display irrigation parameters associated with the irrigation schedule defining irrigation for a plurality of irrigation zones, and configured to display at least a next irrigation start day, a next irrigation start time, and a next zone to irrigate associated with the irrigation schedule regardless of a selected one of the plurality of irrigation zones and without further user manipulation of the user interface.

8. The system of claim 7 , wherein the irrigation schedule defines irrigation for a plurality of the plurality of irrigation zones, wherein the user display is configured to display at least one of the next irrigation start day and the next irrigation start time scheduled to occur for all of the plurality of irrigation zones.

9. The system of claim 7 wherein the user interface is coupled to the irrigation controller via a communication link, the communication link comprising a wireless communication link.

10. The system of claim 7 wherein the user interface is part of a general purpose computing device.

11. An irrigation control system, comprising:

an irrigation controller comprising:

a housing;

a microcontroller within the housing and configured to modify an existing irrigation schedule and execute the modified irrigation schedule; and

a valve driver within the housing and coupled to the microcontroller and configured to output a zone activation signal to an actuatable zone valve in response to signaling from the microcontroller; and

a user interface remote from the housing and coupled to the irrigation controller, the user interface comprising:

a plurality of user input devices; and

a user display comprising a display screen and configured to display an irrigation parameter associated with an irrigation schedule, and configured to display a variable irrigation duration adjustment schedule associated with the existing irrigation schedule.

12. The system of claim 11 , wherein the user display is configured to display the variable irrigation duration adjustment schedule in a graphical format.

13. The system of claim 11 , wherein the plurality of user input devices are configured to allow the user to modify an irrigation duration of an existing irrigation schedule based upon a current month-of-year.

14. The system of claim 11 wherein the microcontroller is configured to automatically adjust a first duration of the existing irrigation schedule in accordance with the variable irrigation duration adjustment schedule.

15. The system of claim 11 wherein the microcontroller is configured to automatically adjust a first duration of the existing irrigation schedule to different ones of a plurality of duration values in accordance with the variable irrigation duration adjustment schedule, each of the different ones of the plurality of duration values corresponding to a different time periods within a year.

16. The system of claim 11 wherein the user interface is coupled to the irrigation controller via a communication link, the communication link comprising a wireless communication link.

17. The system of claim 11 wherein the user interface is part of a general purpose computing device.

18. The system of claim 11 wherein the variable irrigation duration adjustment schedule comprises a plurality of values used to adjust programmed irrigation duration values of all zones of the existing irrigation schedule, wherein each of the plurality of values represents an amount by which each of the programmed irrigation duration values are automatically adjusted over time, and wherein at least two or more of the values are different from each other.