Hmmm perhaps. I'd need two, one for opening the door and one for closing (reversing the polarity) it. Looks like the Sonoff Dual would be good for that.
I'd have to check whether it can handle the current being drawn by the motor. Could be a worthwhile option.
So it seems with the recent lightning we've had around Johannesburg, that one of my house's security roller shutters' receiver decided to give me the finger. It now refuses to respond to me pressing any buttons on the remote and it won't respond to my attempt to reprogram it either.