reMarkable 1 compatibility

[rschroll]

I suspect RMStylusButton will not work with reMarkable 1 devices. They have different numbers for their input devices, which should be enough to break things. There may be other incompatibilities.

I don't have a reMarkable 1 device to test with. If you do, and want to do some debugging to get this working, please comment below.

[jsainzvela]

I do own a Remarkable 1 (yes, still working!) and a Lamy pen... If you want to use me as a betatester/debugger, please do.

Thanks!

[baflo]

Would second as an RM1 tester as well :)

[skatsarakis]

Question: I have a Remarkable 1, and I am trying to make it work, but I keep getting the error "Error in opening uinput." Apparently, /dev/uinput does not exist on my device. Is there anything I can do about it? Additionally, in case it plays any role, I am running it on remarkable-distribution 3.17.

[maxanthem]

Question: I have a Remarkable 1, and I am trying to make it work, but I keep getting the error "Error in opening uinput." Apparently, /dev/uinput does not exist on my device. Is there anything I can do about it? Additionally, in case it plays any role, I am running it on remarkable-distribution 3.17.

I just ran some tests (*) on my RM1: it doens't have uinput indeed (that would be to simulate undo/redo → simulated keyboard key presses CTRL+Z/Y) so we anyway don't need this for the eraser.

Other differences:

• The pen device on RM1 is /dev/input/event0 instead of 1.
• The button event is the same BTN_STYLUS
• However to select the eraser, the current version uses BTN_TOOL_RUBBER which only exists for RM2 and not RM1 (RM1 was not supposed to support eraser in the first place). The way to bypass this would be to simulate touchscreen events on the eraser button...

At this point, I am tempted to just refresh the original repo: https://github.com/isaacwisdom/RemarkableLamyEraser
The clean improvements of this repo don't seem applicable to RM1.

But the good news is now that I spend half a night getting familiar with this, I might be able to get us, RM1 lovers, a working stylus button with the other repo :) (I will check later if it makes sense to PR them here or there)

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(*) Setup for my tests:

• RM1 3.25.0.142
• Toolchain: https://storage.googleapis.com/remarkable-codex-toolchain/remarkable-platform-image-4.0.117-1-rm1-public-x86_64-toolchain.sh