I have a couple of hobbies that lead to various groups of people gathering at my house on a regular basis. Our groups have had many people come and go over the years, some people only come for 2-3 weeks.

The problem I've always had is ensuring that with a lot of people using my wifi on and off over the years I want to make sure I update the network keys regularly. I enable and disable the guest network before and after each session. Until now I have been changing my guest wifi network keys on a weekly basis and re-printing the QR codes (2.4GHz and 5GHz) each week. The printed codes I can then pin on my wall and people can scan and join as they walk in the door.

I am getting sick of printing out QR codes and using oodles of paper though.

So I thought, what if I update QR codes each week, save them digitally and then dump them into a public folder. I could have a single static link that would display the network QR. I could then single print the website URL QR and have that permanently on the wall. They walk in the door and scan the same QR code but it displays a new image each week.

The problem is, the person can scan the QR code off the wall, be directed to a QR image ... and then what? They can't scan it because it's on their phone. 

How do I make it easy for them to join my guest network?