I would go with raspberry pi, it can handle more modules and different types of variations, so I would try using raspberry. I would advise you to find an emergency locksmith e11 and install a smart lock first of all just to have a look at what those locks look like and what functions it has. A good idea to test them, but I would recommend you test 3 or 4 locks, at the same time, different types of smart locks, to see which one works better and faster. One of them, I would take apart to see how they are built and what is used there. ... View more