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The link was entirely random to show a similar mass produced product, I didn't do much research.

You can search for NFC ones on the same website, they're a few bucks more.

There are also Bluetooth variants which is more friendly to hacking at home (update over the air from farther away) but those look pricier.

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Does anybody here know a Bluetooth (ideally) or NFC one? Preferably with a known protocol that has open source software... at least a known/open protocol to set the displays if not end-to-end open. I have wanted to play with one of these but haven't been able to find one that is easy to hack on.

I'd really like a $10-20 epaper display that I could update wirelessly on very low power, there are so many fun projects that could be done with that. There are a few dev boards that almost hit that price point but software support is really bad in my experience.

There's a pretty good set of videos here showing how to hack them: https://youtu.be/S44NSr37eoo

Thanks for this video!

It shows a nice layout with 3D-printed holder, pogo-pins, ESP32 Lolin as programmer, with CC2531 RF dongle as the access point.

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