How guests use it
Guests open their phone camera and point it at the code. A “Join network” button appears, and they are connected. This works on iPhone (iOS 11 and later) and on most Android phones.
Where to put it
Print it for a guest room, a meeting room or a holiday rental, or keep it on your phone to show visitors. Anyone who can see the code can join, so don’t hang it where passers-by can photograph it.
For a guest network, change the password every now and then and print a new code.
Sending the password instead
If the person isn’t in the room, send the Wi-Fi details in a temp.cool link that self-destructs after reading. See the guide on sharing a Wi-Fi password.