Thanks for your rating. It's great to hear that you like the add-on. 😀

A barcode generation is not planned, because a barcode can only encode numbers, not letters or other characters.
Also all barcode readers for mobile phones can usually read QR codes too and QR codes are much more handy, so we prefer these.

If you have further issues or questions, feel free to ask or suggest a feature by opening an issue on https://github.com/rugk/offline-qr-code/issues. Thanks.