I'd love to have a QR code on the side of my HVAC system, water heater, filtration system, etc. If the manufacturer provided a way to do that they could offer their expertise with the product and a convenient way for you to record that information. There is a ton of stuff around the house that I need to record information about but have to have my own system. Now's a good time to make sure everything is in shape'.

They could send you periodic reminders like, 'it looks like it's been a while since an oil change', or 'it's getting cold outside.

Scanning the code could take you to a manufacturer page for your specific machine, where you could record routine maintenance like oil changes, get a copy of the manual, and order replacement parts. I could have scanned it and immediately registered it with the manufacturer. Safari can also recognize them in images - just tap and hold your finger over a QR code. And once you’re done, you can print it off and keep a copy underneath your coffee table book or taped to your fridge so people can scan it whenever they want without bothering you. It would be nice if there had been a QR code on the machine that identified that specific machine. With the advent of iOS11 the stock camera app now recognises QR codes (including for joining a WiFi network). How to Set Up Your QR Code for Your Wi-Fi Password Setting up the custom QR code is a fairly quick and easy process. As a trivial example, I own a snowblower. On the other hand it could have been a great way to develop much better relationships with your customers. I'm not going out of my way to scan a QR code just to be advertised to. Most of the early QR codes in the US were just links to advertising. I really think manufacturers have really missed out on an opportunity with QR codes by handing them over to marketing.

Wifi password qr code reader