Roller Shutter Belt Winder (Gurtwickler)

Has anyone on here, probably in Europe, found a zigbee / zwave / wifi roller shutter belt winder that does not use a proprietary protocol?

I live in Spain and, like most Spanish homes, I have belt controlled roller shutter blinds on every window. I would like to automate these. There is a solution made by the company Rademacher but its proprietary and expensive. Anyone with experience please?

Rademacher Belt Winder