QR codes seem pretty innocuous until you scan a bad one and get something nasty on your system. If you want to keep your ...

You can put one on your business card so people can quickly access your contact information, or on your living room wall with your network’s SSID and encryption key. The design of QR codes also ...

The officers enter the store, scan the code, answer a few questions and also talk to those in the area to check in and see if there are any issues or potential issues.

Sure would be a hassle to have to repaint the wall. Enter this interesting project ... guest WiFi network and present the appropriate QR code on an OLED display attached to a Raspberry Pi Pico.