[Piet] wrote in to tell us about his hack that allows for his front gate to be opened without a key. Unlike this hack that we featured in August, you don’t need a subway pass, just a good memory. As explained in his article (and the video after the break) if the proper sequence of doorbell rings is input, the gate unlocks itself.
For hardware a [mehduino] is used to take the doorbell input and decide whether or not the “secret knock” has been achieved. The door can be unlocked remotely via a button on the processor. Reprogramming the code is achieved by simply holding the program button while the code is entered on the “remote ringer” button.
Be sure to check out the video after the break to see this lock in action. The housing application may not be exactly what you expect. Also of interest, is that in true hacker fashion, the bare processor is hanging by a hook on his wall!
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how meny procent can you be off of the sequence to open the gate it look to me that you never can press that button exact the same way every time you always
some ms off the 2e time
You can set this up in the source code. For the moment it is set up so that a single knock can be of by 25%, and the overal pattern may be of by 15%
This sounds like a security risk. The neighbours, or other mean-doers, could easily eavesdrop on the rings.
Perhaps useful in a two-pass system? ;)
It is very insecure indeed, but as you can see in the video it is very easy to bypass the gate anyway. Downstairs there are locked doors. So for this application it is secure enough. I would however not advise to use this on an actual front door.
Yea I was going to say that, that gate is about as secure as a beaded curtain! Nice hack though, you could apply this on a home doorbell by using the ring code to announce who’s at the door, give each friend their code and when they come over you know who to let in and who to blow off. :)
i had a friend which name is jan, i called him janus, becaue of anus
nice
Bitlair!
Very nice hack. Good hacks are always a combination of hardware en good software.