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

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.