Hmmmm, in skimming some code I want to pull into a dumbphone...

* It appears that I can offload HTTP requests onto cellular modems: HTTP-client, tick!
* I'm planning to the pull in the high-quality bare-metal text-rendering from an ereader, which naturally supports HTML + limited-CSS as part of implementing ePub: HTML, tick!
* I'll include ArduCam just in case: Camera, tick!

I just needed to find & bookmark https://github.com/dlbeer/quirc before committing to including a QR code scanner in my project!