The DE2120 has the unique ability to enumerate all three protocols including a CDC serial driver so the device appears as a standard COM port. The module can be configured either by using the serial interface or by scanning command barcodes found in the Settings Manual.Īll keyboard, HID, and serial can be transmitted over the single USB-C connector. The QR barcode in the middle is a transparent GIF image and the bottom Aztec barcode is a canvas PNG. The top left symbol is created by a minimized path shape, the top right (if present) by many single squares. When you're ready to incorporate the module into your embedded project, you can leverage the 5 pin header for direct access to the TTL serial pins, power pins, and trigger input. The program creates 2D barcode symbols of Data Matrix, Aztec, PDF417 and QR code as vector graphic. A buzzer and status LED are connected to the module through appropriate drive circuits and a push button tactile switch is provided on the "trigger" pin. The scanner's USB interface is exposed via the on-board USB-C connector. This breakout board makes it easy to explore all of the capabilities of the DE2120 without dealing with finicky flat flex cables. For example, a single 2D code can hold up to 3,116 numeric characters or 2,335 alphanumeric characters, compared to the 39 characters that Code 39 can hold. The module also features two LEDs: one for illumination and one to project the red line that you're used to seeing from laser-based scanners. Unlike 1D barcodes, 2D (two-dimensional) codes contain information both horizontally and vertically, allowing them to store much more data. The DE2120 reads 20 different barcode symbologies (both 1D and 2D) using a camera coupled with on-board image processing to identify and decode everything from UPC codes to QR codes. Essentially, QR codes are able to be scanned across multiple barcode scanning applications, but proprietary codes, such as Microsoft Tag, can only be scanned using a specific application. The SparkFun 2D Barcode Scanner Breakout is a nifty little breakout board featuring the DE2120 barcode scanner module from DYScan. Typically, when referring to a non-QR code 2d barcode, I refer to them as proprietary barcodes.
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