QR (quick response) coding was developed in 1994 by Denso Wave for logistics in the automotive industry. The 2D matrix consists of a square with black and white fields, which represents data in binary form and stores it with triple redundancy within the code. The more information that needs to be stored in the code, the larger the square. A maximum of 177 x 177 modules can be used.
How does a QR code work?
To decipher a QR code, it is read by a QR code scanner or by the camera of a smartphone with QR code reading software (iOS 11 or higher). Samsung’s QR code scanner is hidden as an extension in the ‘Internet’ web browser. On Huawei, the scanner works via the gallery app after first photographing the QR code. The software determines the URL behind the QR code (usually as a short link), forwards the user to this target address and displays the corresponding web content. To generate the QR code, you need a code generator that creates the printable 2D matrix.
Two major advantages of QR codes
The application is supported by every mobile operating system. The user needs either a camera capable of scanning or an app with the relevant reading or decoding software. Using it entails virtually no additional costs, at most print costs in order to make the QR code visible on a third medium – for example on posters, folders and advertising signs.
What you need to bear in mind when implementing QR codes on wingu is explained here: https://www.wingu.de/was-sind-qrcodes.