Activating apartment building buzzer “Door” open button remotely

pcbremote control

I often times have difficulty getting to the buzzer of our building quick enough for FedEx and UPS, etc… or when I get visitors, they are sometimes inpatient and keep buzzing even though I'm still trying to get to the buzzer to let them in. I'd like to build a remote control to activate the "Door" (open door) button on my building's front lobby buzzer system. I imagine the "Listen" and "Talk" buttons are a bit more difficult, since you need to build audio and a microphone into a remote device.

Below are a bunch of pictures of the outside and inside of my buzzer system. This system is directly wired to the front door of our building. How can I integrate this with a remote control, a smart phone, or other remote device, so that I can press this button 30 feet away from the actual button?

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EDIT:

White mode button instructions taken from Amazon review:

There is a small, white mode button on the relay circuit board. With
some experimentation, I have found 4 modes so far: (1) Push the mode
button on the relay board once and the remote button once and you get
a mode with the relay "on" (or "off" at the normally closed terminal)
ONLY DURING THE REMOTE BUTTON PUSH. (2) Push the mode button twice and
the remote button once and you get a mode that is "armed". When you
push the remote the relay turns on (or off) and cannot be reset with
the remote (alarm?). (3) Push the mode button 3 times and the remote
button once and you get the usual latched on/off operation. Each
remote button push toggles the relay state. (4) Push the mode button 4
times and the remote button once and you get an on (or off) state that
lasts about 4 seconds and then goes off. (Use?) I couldn't find any
more modes. If the relay board power is interrupted and turned back
on, it reverts to mode(1).

Best Answer

What you want to get is a one channel, wireless remote control, like this one from Amazon:

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The receiver has a relay contact output, that can be set to either operate momentarily as the remote button is pushed (which is what you want), or operate in a latching mode, on, off, on, off (which you don't want). This is selected by a small white mode button on the unit. One of the reviews explains the settings (apparently the documentation is not so good.)

You will want to wire the relay contact in parallel with the Door button contact on your existing unit.

The unit runs on 12V, I don't know if that voltage is already available from your box or not. Otherwise you will have to make provisions for it.

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