I have tried to find Curtain/Blinds automation hardware for a reasonable price, but haven’t had much success.
I came across this Kickstarter project today!
https://www.kickstarter.com/projects/789589988/movemotorize-blinds-and-shades/description
Not bad priced, the only one I’ve seen before (retrofittable) was over 200USD.
Let’s hope this comes into production. Seems to work through Bluetooth, so I suppose RPi with Bluetooth and a pimatic ShellSwitch would suffice to control.
They say the API will be open.