I guess it helps to understand how to generate a QR code: https://www.nayuki.io/page/qr-code-generator-library https://www.nayuki.io/page/qr-code-generator-libr

I guess it helps to understand how to generate a QR code: https://www.nayuki.io/page/qr-code-generator-library https://www.nayuki.io/page/qr-code-generator-library (see also the references at the end) Good luck. ;-)