I've been advised that the outputs from the intercom are 0v but I'm reading 0.3v and 0v when the code is entered to unlock. I've been told to wire a relay in like this but can't help thinking all I'm doing is supplying 12v to the relay permanently?
[Image: C612C457-5705-4A02-9F5E-DB1402B05057_zps4wwzfet5.jpg]
[Image: C612C457-5705-4A02-9F5E-DB1402B05057_zps4wwzfet5.jpg]