Hack – Hacking Your Intercom System
Ever need to hack your intercom system? I asked my friends on NYC Resistor and they helped me figure out how:
- Get an RF remote transmitter and receiver and power adapter – they’re pretty cheap from electronickits.com
- strip the power adapter wires
- wire the power adapter wires into the RF receiver (check voltage to know which is negative and positive)
- test the power by pressing the “learn” button on the receiver
- “learn” your receiver – press the “learn” button on the receiver and start transmitting with your key transmitter
- open up your intercom system and find the wires that hook in the “unlock door”
- using the voltometer, test your intercom to see if your circuit is closed and needs to be opened (via the relay) or opened and needs to be closed (again via relay)
- wire from the RF reciever to the intercom, then from the intercom back to the receiver to complete the circuit – it’ll either be Normally Closed or Normally Open
- test the transmitter triggers the relay (button one does Normally Open, button two does Normally Closed for me) and it should trigger the intercom “unlock door”
- Celebrate!
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- RF Remote Control Relay Board
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- Stripped Power Adapter
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- Intercom System
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- Intercom System – Faceplate Removed
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- Tools – Transmitter, Receiver, Wire, Screwdrivers
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- Receiver – with Power
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- Receiver – With Transmitter Testing
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- Intercom System – green wires into receiver + system
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- Intercom System – green wires into receiver + system (CLOSE-UP)
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- Wireless Receiver – Top
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- Wireless Receiver – Inside Box
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- Wireless Receiver – Inside Box 2
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- Wireless Receiver – Inside Box 3
Here’s another solid example of keyless entry from Make
Below is a quick gallery of images of the process! Hope this helps!
FTD
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2 Comments to Hack – Hacking Your Intercom System
Hi there,
I have the same intercom. I would like to configure it so that an email opens the door, using an arduino hooked up to the net. Any suggestions? I’m a novice, but lost my front door key and now dead set on figuring this out.
Thank you!
Heya Annie!
That doesn’t seem too hard, and quite inventive! Here’s how you’d do it, in my opinion:
Hookup an arduino to the intercom system similar to my instructions
Setup the arduino to hook to the web (http://arduino.cc/en/Tutorial/WebServer)
setup a webmail account to send to when you want to open the lock
Setup a web service that will open up the mail to the mail address you setup, and setup a chron job to call it every minute / second (http://stackoverflow.com/questions/114953/how-to-get-email-and-their-attachments-from-php)
Setup the arduino to run the script. If the mailbox is full, delete all mail, and trigger the arduino to open the door
So you can send an e-mail from your phone to an address and within a minute, your door will open!
What do you think?
Dom
May 19, 2010