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dscKeybusInterface
An Arduino/esp8266/esp32 library to directly interface with DSC security systems.
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The sensors themselves are relatively easy to defeat, a strong enough magnet in the right position and you can pop a door or window open without tripping the sensor. This specific DSC panel was chosen as the bus protocol was unencrypted(the only reasonable attack would be a playback attack, everything needs a user, master, or installer code), but it would be relatively easy to add an esp8266 behind the wall plate of a keypad. (take notes, this is why you should have motion detectors wired inside, and add latching tamper zones). I don't have to worry about the encryption issue, since the keybus line doesn't go outside of a locked closet, which will probably use the latching tamper preset.