433 MHz sensor sensor scan
I've got lots of old 433 MHz sensors that I used on my old Nexa/Telldus system. Once benefit of the Telldus system was that it automatically detected sensors. There are lots of "China" copies out there and having to find which (if any) that matches the Zipabox device list is hard. I've got several cheap "nobrand" ones that seems to be Oregon Scientific compatible.
I can't see why you could not implement a "scan" feature for the 433 radio. Just listen for any 433 MHz sensors for about a minute and add all compatible devices that were found.