For information, I will start a plugin for Jeedom to communicate with OpenSprinkler.
API of OpenSprinkler is well documented, so it will be easy I think.
I’m in France, personnaly the house project is at only starting.
Jeedom is a french home automation software mainly. Written in PHP with different languages for the services (nodejs and python mainly) when needed.
There is more than 200 plugins. Myself I have 40 actually.
So hope to get a opensprinkler soon for the garden part and to have communication with the full house.