Comment by userbinator

Is it really "closely guarded", or "worst guarded"? Anyone with a logic analyser and a few hours can probably figure it out easily enough... and some have even gone beyond what the official controllers can do:

https://hackaday.io/project/11537-nekocal-an-e-ink-calendar/... (previously discussed at https://news.ycombinator.com/item?id=16140284 )

More research from others:

http://essentialscrap.com/eink/

https://news.ycombinator.com/item?id=11894613

https://www.eevblog.com/forum/microcontrollers/interfacing-e...