Hello, still no answer, but I'm thinking of a workaround would be to use a sensor wireless door opening. In place of the bulb making contact, would use a system NO or NC would send the signal when the doorbell or intercom will trigger by closing or opening the circuit. This sensor will connect to a Receiver Universal of alarm central with relay, and this in a DVR.
I've been seeing something with Arduino, but for now I think complicated by the lack of time to study this system.
What do you think of the idea?