I want to control this remote in the picture using GPIO. Am Newbie. I followed a cookbook to connecting the relay directly to the garage door motor but thought "Why not use the remote and perhaps control BOTH doors with one PI. My pals made fun of my idea saying I would have to invent a finger that presses the remote. I pulled apart the remote and soldered the wires A, B, C, and D. Now when I touch A and B wires I get a blink from the LED which tells me I am creating the connection same as pressing that button. C and D activate the other button. I also realized that I can cross other wires like A and C and get the button to press as well. Basic stuff. Here is my question:
The cook book says that the relay is sending voltage through to the garage motor via the RED and WHITE cables (E and F in pic). Am I doing something bad by connecting ABCD to relay and trying to get GPIO to close circuits? I suspect I am sending voltage the system does not need.