Migration

Background: Control4 is a proprietary home automation system, installed at the customer by 3rd party installers. Devices (TVs, lighting systems, HVAC...) need drivers in order to be supported by the system. Many drivers are provided by Control4, others come from 3rd party companies. Installers can program devices using a simple graphical programming interface, depending on what operations the device driver offers (e.g. if switch_1 is pressed, set lights_TV to 50%). Our company was one of these 3rd parties writing drivers (i.e. Lua code accessing Control4's interfaces called "proxies") for Control4. The problem: Control4 kept changing proxies or added new, better ones. Sometimes they even changed the way the "programming language" of the proxies worked. They didn't provide a migration tool, though. Every time we updated our drivers in order to make use of the new features, installers needed to delete the old drivers, install the new ones, configure and reprogram them. Imagine doing this for 100+ devices in a large house... Since it is a proprietary product, only the interface of the proxies is documented (badly), but nothing else, especially not how everything is stored internally.