I just saw this garage door topic thread and thought I join in.
The idea of using a spare garage door transmitter to control my two garage doors seems to be the less complicated.
Since the OSPi system drives solenoids for the sprinkler valves, and the solenoids I use are less than $10 at Home Depot, how hard do you think it would be to build a mount so that a solenoid plunger could push a transmitter button? The plunger on the Hunter solenoids I use don’t have much movement and they move inward not outward. Does anyone know of any 24Vac solenoids that “push” outward and have at least a 1/4 to 3/4 inch movement?
It might be fun to build this as a project. 8^)