[sharikone]

In the rM1 you just write to a framebuffer device in /dev/fb0 to write on the screen. It's so easy you could probably write an application that does that, compile it for ARM, load it via scp and run it. All in 15 minutes even if you know nothing about the Remarkable itself.

The rM2 is a lot trickier. A full reverse engineering of the drawing routines is still unfinished, as far as I know. So you either manipulate the memory of their closed source application or reuse big binary chunks of it. There are of course abstraction layers built over that by the community but as of today I believe it's much less refreshing than the rM1.

The rM1 used the chip electrophoretic display controller directly , while the rM2 has a software controller which is closed source. Hence much of the complications