Pattern created using: https://www.qrcode-monkey.com/
Stitched using DMC floss on woven cotton. Each stitch is approximately 1mm.
I wanted to know if my style of cross stitch would be readable as a qrcode, so as my first project to post on here I embroidered a qrcode that links to this blog. It works decently in person and I did manage to get it to scan from the photo with a little difficulty.