If you have a motor driver that’s compatible with latching valve, the software piece should be fairly easy: to open the valve, you apply voltage in the positive polarity (positive to valve’s positive wire, negative to valve’s negative wire), the timing should be about 100 milli-seconds. To close the valve, you apply voltage in the reverse polarity. OpenSprinkler Bee (OSBee) operates latching valves, and you can check OSBee firmware code for reference.