It’s been done. You just have to get the right hardware. But the way it will work is that you will attach a zwave Device with dry contacts to a universal receiver so that it will actuate when the signal is received. Then you use that Z wave device changing state to trigger other smartthings events.
Here’s one project report that did this (The topic title is a clickable link):
And here’s the community FAQ listing devices that have those kinds of contacts.
You just have to get the right hardware. But the way it will work is that you will attach a zwave Device with dry contacts to a universal receiver so that it will actuate when the signal is received. Then you use that Z wave device changing state to trigger other smartthings events.