I’m very new to all this, so please bear with me. I have a suite in a mixed use building, and we have a 4-wire intercom. I want to see if I can add a momentary switch to the current intercom so that I can, for instance, set up a time window for the janitorial staff or other visitors, and when they buzz the intercom for my suite, the intercom “door” button automatically buzzes and lets them in. I don’t know if that’s feasible, and I am not tech-savvy enough to write up the code for myself, so getting a starting point is basically where I am at this point. Thanks in advance for any help you can provide!
It can be done, but not just with code. You’ll have to wire in a device to the circuit that can communicate with SmartThings.
You can see how other people have approached it by using the quick browse lists in the community – created wiki, looking under project reports, and checking the “doorbell projects” list. There are a couple there. 
Ah, okay, great. I appreciate it. So, dumb question- do you have to wire in two separate devices, one to “hear” when the intercom buzzer has been buzzed, and another to trigger the door buzzer itself? I was thinking about the Levitron 30 amp load control module, here:
https://www.smartthings.com/products/leviton-30-amp-load-control-module
I thought that would work (potentially) to trigger the buzzer to let people in, but I don’t know what to use to “hear” the buzzer being buzzed from the front door in the first place.
I’m hopeful this works out, because wiring other stuff to the SmartThings hub would be very helpful for my business.
Hi [deleted]
I’m new to smartthings and have an added feature and wonder if you may shed some light.
Similar to OP, I have an intercom phone too but it’s an audio/video door entry phone intercom.
Was wondering if you help how one goes round to connect to smartthings for:
1.) Audio Buzzer which allows voice communication on existing unit
2.) Video
3.) Unlock mechanism
I’m planning to alter my current phone to add in the additional features so I can be notified via phone or tablet.
Thanks Robin. Ill start a mini project to test it. Shame we cant do a bidirectional audio communication as yet
Thanks a ton for the info. I’m not sure if the input voltage is less than 16v. I have a voltage tester and can check, but I’m not sure what to connect it to (sorry, not as savvy with the electrical stuff as I’d like to be).
If it does require an audio signal, which it might be, what would I need to do in that case? Just trying to sort out what I need to actually purchase before I bring in an electrician to hook it all up properly.
Thanks for that info. I’m planning to test the voltage tonight, but I honestly don’t know what to connect to what. Do I need to see what the voltage is when the circuit is on (like when someone buzzes, or when I buzz them in?), or can I just connect it and see what voltage is going through the panel? Sorry for all the questions- just very new to this.