Always wanted to display a dynamic QRCode on your dashboard or wall mounted tablet as a card/popup/whatever?
https://github.com/Hypercookie/hass-qrcam
Well this integration makes it possible. It will create Camera-Entites that display a QRCode which can be generated from plain text or a Template and update if the Template outputs a new state.
It also offers many ways to customize your QRCodes (Colors, Shape, Masks, Error Correction, etc ).
This is especially nice with browser-mod which makes it possible to have qr codes as a popup. (Hey Google, display my wifi login on the tablet …)
But since this is a camera entity you could also embed the qrcodes in a notification and send it to your mobile device.
I hope you have fun with this!