They do sometimes use stolen remotes - which is why you should treat a garage door opener the same as the key to your front door. In reality, no burglars are going to go to the trouble of building a sniffer to capture codes. Breaking a window or door can make noise and attract attention, which can lead to cops or armed neighbors showing up.īeing able to press a button, then drive or walk into the victim’s house and close the garage door behind you with no trace of forced entry is very attractive to a burglar. Picking a lock takes time and skill, which they don’t have. You don’t understand it because you’re not a thief.īurglars are at their most vulnerable when they are actually making entry to the house. Posted in home hacks, Security Hacks Tagged attiny, garage, remote, sniffer Post navigation Update: The code and PCB files (with the error) are available through one of the following mirrors:į/file/a0eb0gg/n/code_grabber_zip With the codes, one can configure another garage remote to open the door. If you have any suggestions for V2, We’re sure will be reading the comments. It is fairly straightforward, but takes up 98% of the microcontroller’s memory. The program is designed to monitor pin change interrupts and timers to filter out invalid codes as well as noise. Any info (the door codes that have been sniffed) is displayed through a 4-bit interface on the LCD, for easy recording. built the sniffer around a custom PCB (though he ran into a few layout errors that he had to fix post-production). Since the signal coming from the receiver was very low, had to amplify it through a buffer before it could be detected.Īn ATtiny26 and a 4 line x 20 character backlit LCD were used to interpret and display info from the receiver. The receiver was connected to a logic analyzer in order to determine its protocol. He was unable to find both a transceiver that worked on the frequency of his remote control ( 308MHz clocked MAX7042 chip), so at least for this incarnation (he plans to build another one that is capable of replaying a captured signal), only a receiver was implemented. started off with a trip to the hardware store. After receiving a piece of chain mail which stated that criminals have the technology to record any remote code and play it back, wondered if he could build such a device that would work on at least his opener model. In this awesome proof-of-concept project, expanded that array to include garage door openers. Your keystrokes, phone conversations, and wireless networks could all be monitored. Some type of logger or sniffer exists for almost every form of electronic communication.
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