Live QR check-in
One scan. That’s it.
A new QR every 5 seconds. Each one is valid for 10 seconds.
Try it with your phone.
Start the display here. Scan the QR with your phone’s normal camera and open the link.
No app, login, or website camera permission.
What this test does
The server checks the QR’s signature and scheduled 10-second window when the link is opened. An expired link asks you to scan the current QR.
The display saves 20 upcoming QR codes and their images, enough for about 100 seconds when full. They activate on schedule, even during a brief display internet outage. The offline test button stops fetching codes; your phone still needs an internet connection.
QR codes are generated by the ZXing barcode library. This test does not record staff names or attendance. A link forwarded quickly enough can still work; the short lifetime is a deterrent to casual sharing.