Aaron Christophel | Hacking the Battery less NFC E-Paper display from Waveshare + Custom Firmware @atc1441 | Uploaded November 2023 | Updated October 2024, 5 hours ago.
This videos shows how I got from an undocumented TN2115S2 SoC to a full custom firmware on the:
Waveshare Passive NFC E-Paper display

Source Code Repository:
github.com/atc1441/Waveshare_NFC_E-Paper_Display_custom_firmware

There are multiple different sizes available and all seems to use the same SoC inside
waveshare.com/2.13inch-nfc-powered-e-paper.htm

Follow me on Twitter: twitter.com/atc1441