Thanks @gabrielstaveira - that's a really cool idea! Would be really easy to add this to a LED matrix Arduino board. Something like this: https://www.adafruit.com/category/327
That way you could always keep the menu up to date, and actually have the ability to order food directly from an app that runs locally on the device. That app, the menu, and all related functionality could be completely self-contained in the QR code itself.
That way you could always keep the menu up to date, and actually have the ability to order food directly from an app that runs locally on the device. That app, the menu, and all related functionality could be completely self-contained in the QR code itself.