Here’s the idea: you attach a QR code to your key ring that, when scanned, opens a texting window with “I found your keys!” set to send to the key owner’s phone. When I saw the ...

Pumping Station One member [celtwolf] thought it would be great if your keys could help someone contact you instantly upon finding them, so he created a key fob ... generated a QR code from ...

Rather than have a guest select your Wi-Fi network and then enter a fiddly password, just make them a QR code their iPhone can read. Here's how to do it. You wouldn't want to put a QR code for ...