If E-Paper Looks Like Paper, Why Not Make It an Actual Printer?

Uploading files to an e-paper reader felt needlessly awkward, so Nishant Joshi made an Xteink X3 appear on a computer as an ordinary network printer. Select it in the macOS print dialog, send a document, and the page appears directly on the reader's display.

Because the ESP32-C3 cannot hold a full high-resolution print job in RAM, the firmware processes incoming pixels row by row and writes them straight to the screen. Finished pages are also saved to the SD card, making a folder the printer's equivalent of an output tray. E-paper has become so paper-like that its interface loops back around to printing.