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You can generate free QR codes with this pattern. A QR code is a two dimensional barcode that stores information in black and white dots. Drag and drop the block to your screen and set the input parameters. Don't have any external depedencies and works offline

QRCode generator for outsystems mobile applications.
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Has QRCodeGenerator reusable block which return the Image URL of the generated QRCode.

A plugin for barcode scanner using ZXing library.