As little documentation exists for such devices, we researched the types of data transfers for USB and learned how to construct these binary instructions bit by bit.
It doesn't have a serial interface and therefore requires direct control through binary data transfers across the USB protocol. MagWorks Software - Our magnetic stripe reader is an HID USB device.
The pulse of data within this field "tricks" any magnetic card reader, be it a point of sales or a door lock, into thinking a card was swiped through it. Using a magnetic card reader, we obtain the raw binary data from the user's card and program it to the key-chain device (ATTiny85), so that it can replay the binary signals through a temporarily generated electromagnetic field. It works with any type of magstripe card, such as a student ID or a credit card. What it doesĬardFree replicates the magnetic signature of a magnetic stripe card. What if there was some way to simplify the process of getting into our dorms? Wouldn't it be easier if you could swipe into your building with something attached to your keys? What if you could replace all magstripe style cards in your wallet with a single keyfob? Our CardFree project was inspired by our interest in Samsung's MST technology and our desire to build something that might improve the convenience of an action taken by students multiple times a day.
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