[silentguy]

Can the http link not be directed to other protocols like FTP, or WIFI:T:WPA;S:{ssid};P:{password};; in this case? I guess this might have some security implication. And, some clients can block such redirection.

I tried with HTML href on my mac. It didn't work. Maybe it'd work on phones.

[Fnoord]

The dynamic vs static is also one of the criticisms to NFTs. They're just links to dynamic content in a distributed database. The content itself could change any time, or go down. But it looks like it works (there's a word for this: scam).

How would you use a dynamic link like HTTPS URL shortener if you're trying to achieve internet access? You could overcomplicate it with another AP which only works with QR code.

A colleague once painted a QR code, kinda cool its possible and it worked, but its no magic. Its just static content. If you want it to be dynamic, e-ink is perfect for this purpose. It doesn't require electricity, only if you change the content. So if it is say a Raspberry Pi Zero, it could be powered off, and only get powered on when required (even the e-ink screen itself could be detached).

I know they use captive portals a lot for this purpose but I don't see how say WPA2/3 Enterprise could not work for this.

[c22]

How is your guest going to visit the link when they're not yet connected to the wifi?