When it comes to specifics of electronics I'm a bit of a noob, and as such, looking for a little help / guidance.
I've got an arduino uno with ethernet shield, reed sensor, and relay module all connected up and working great for opening / closing my garage door, detecting open/close status, etc.
What I would like to do next, is, given there is also a security gate just outside my complex, I would like to take an extra remote that I have, and connect the remote's board directly to my arduino uno to mimic the button press, so that I can issue a gate toggle programtically. This seems to be the most "eloquent" way for me to pull this off, i.e, I can't monkey with the gate operator to install another arduino with wireless connectivity to trip a relay to open the gate, and I think it is kludgy to try and rig up a mechanical device to actually press the button on the remote, so this is the direction I would like to head.
However, given my electronics noobiness, I'm not 100% clear how I would go about interfacing the arduino with the remote board. The board has the standard momentary switch on it you typically see in arduino starter kits, and I hooked up a multimeter to the varying 2 points on the board where the button is connected, and when selecting various alternate points on the board, w/o pushing the button, I get what appears to be about 4V DC (I didn't expect to see anything until I actually pushed the bottom, btw).
Any kickstarter tips, points in the right direction, etc, would be greatly appreciated.