I have several RPI... I have one that controls the roof of my remote astro observatory, using some level converters drives relays to control two whinchs... When

I have several RPI... I have one that controls the roof of my remote astro observatory, using some level converters drives relays to control two whinchs... When I have to open the roof I launch a python script. I have also another controlling the supplies of the mount, telescope, camera, focuser... These pi's are really realiable (I use Raspian, no X)