I have a Aiphone GT-1C system and am trying to see if its possible to trigger the door release feature for my apartments intercom system.
The pinout reads:
IN | OUT | IN | OUT | ----+-----+----+-----+ R R |R R |B B |B B | 1 2 |1 2 |1 2 |1 2 | 23.4v|23.4v| 0v | 0v |
I measured the In and Out for
0v for In and out of
B1/2. When I press the door release button (when its off not being called) all the pins go to 23.4v high. This leads me to believe that they are sending data over wire. I do have an oscilloscope that I could use but I feel like if it got to that point it would be over my head.
Is it easily possible to control the door release function via Raspberry pi?(I was hoping it would just be turning a pin high and low but sadly it looks more complicated than that and its a 24v logic level)
So I emailed tech support asking if they had a dedicated door release pin and they responded with this:
An option switch dry contact closure can be used when connecting a dedicated strike circuit to the gray and black wires of the 6-pin option cable.
The door release button on the GT-1C triggers the Form C contact built into the back of the speaker module of the entrance. The tenant would need to press the Option button (the icon looks like a laptop monitor) to unlock their own unique door.