Using an Arduino microcontroller and a few other components, almost anyone can build a device small enough to fit inside of a dry erase marker. This can then be used to unlock most hotel doors, including the dead bolt, in no time at all.Video
Using an Arduino microcontroller and a few other components, almost anyone can build a device small enough to fit inside of a dry erase marker. This can then be used to unlock most hotel doors, including the dead bolt, in no time at all.Video
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