I have created a group where you can exchange more easily:
http://www.lynkoa.com/groupes/pergola-bioclimatique
Good evening, for the motorization of the whole thing you can turn to an arduino for the basis of programming, the community is very keen on this kind of project, for a system with blade + cable you don't need a lot of power. You can add a solar collector, a rainfall sensor and other things, there is no shortage of ideas
You may have some leads on this
https://forum.arduino.cc/index.php?topic=213773.0
If it can help you move forward.