For my use case to control motion-activated deer sprinklers, the valve would actually be open indefinitely. The deer sprinkler regulates the flow of water in response to motion. The rachio hose timer however will cut off the water when a human is detected by my cameras, to prevent the human from being sprayed.
If it won’t work to allow indefinite running, perhaps you could at least allow a long runtime, on the order of 12 hours. That would at least allow me to turn the deer sprinklers on for long periods of time, like from dusk to dawn, without having to repeatedly send ‘open’ commands to the hose timer and reduce battery life.
Thanks for considering!