Add initial support for Remarkable Paper Pro

[alexander-akhmetov]

A lot of it is thanks to the incredible work of many contributors from #117, including @owulveryck, @cristiannobili, @danielealbano, @To-Si, @Jayy001, @hegzploit and more 😄

What currently does not work

1. RLE is not supported
2. The Rotate button in the UI
3. The Colors button

At least this, maybe something else.

Main changes

Because RLE isn't supported, I added optional zstd compression middleware alongside the existing gzip. It’s faster and should use less cpu.

ARM64 support

• Added const_arm64.go with device-specific constants for the Remarkable Paper Pro.
• fb_arm.go renamed to fb_rm.go and the build tags updated to support both arm and arm64.

Framebuffer pointer calculation for RMPP

The logic is taken from #117 (comment) and #117 (comment).

Client side (JS) changes

• Passing screenWidth, screenHeight, UseRLE, etc. from the backend to the JS client.
• Fixes for the texture coordinates and the color format if the device is RMPP.

Input devices

RMPP uses /dev/input/event2 and /dev/input/event3, so added these to the device-specific constants.

---

To run the app on Paper Pro you need to disable the RLE and you can optionally enable the compression:

ZSTD_COMPRESSION=true RLE_COMPRESSION=false ./goMarkableStream

There's also a good possibility that the Remarkable 2 is broken. I'd appreciate it if someone could check.

[Jayy001]

This is some impressive work! Well done.

I've tried to run it on my own device, but unfortunately I'm having some issues.

I ran make build-remarkable-pro which generated me the binary with md5 1fe7dba1b23a936c244097be9744462a and general info goMarkableStream: ELF 64-bit LSB executable, ARM aarch64, version 1 (SYSV), statically linked, Go, BuildID=pGPbavxPhEahbbmycnBO/KOuQ8CHlRzAuYsZNSJGr/7B5fNzvlIaUfr6NS1KT8/K2a6oZVCN8UYHf06abdl, stripped.

My device is on the beta version 17. When running, it displays the IP address but nothing else

root@imx8mm-ferrari:~# ZSTD_COMPRESSION=true RLE_COMPRESSION=false ./goMarkableStream
Local IP address: 10.11.99.1
Local IP address: 192.168.0.244

No service is running on port 2001.

Are there any debugging options to generate some useful output to help rectify this issue?

[hegzploit]

This is some impressive work! Well done.

I've tried to run it on my own device, but unfortunately I'm having some issues.

I ran make build-remarkable-pro which generated me the binary with md5 1fe7dba1b23a936c244097be9744462a and general info goMarkableStream: ELF 64-bit LSB executable, ARM aarch64, version 1 (SYSV), statically linked, Go, BuildID=pGPbavxPhEahbbmycnBO/KOuQ8CHlRzAuYsZNSJGr/7B5fNzvlIaUfr6NS1KT8/K2a6oZVCN8UYHf06abdl, stripped.

My device is on the beta version 17. When running, it displays the IP address but nothing else

root@imx8mm-ferrari:~# ZSTD_COMPRESSION=true RLE_COMPRESSION=false ./goMarkableStream
Local IP address: 10.11.99.1
Local IP address: 192.168.0.244

No service is running on port 2001.

Are there any debugging options to generate some useful output to help rectify this issue?

Works fine on my device which is running 3.16.2.3.

[Jayy001]

That's good, what output does it give?

[Jayy001]

I've just downgraded my device to 3.16.1.0 and I can confirm it spins up the webserver, looks like potentially something on the beta is breaking it. If anybody else is on v17, would appreciate the test.

root@imx8mm-ferrari:~# ZSTD_COMPRESSION=true RLE_COMPRESSION=false ./goMarkableStream
Local IP address: 192.168.0.244
Local IP address: 10.11.99.1
2024/12/21 16:20:05 listening on [::]:2001

Here's the output it should give.

[Jayy001]

The output is...quite slanted, though.

No custom hacks have been applied.

[alexander-akhmetov]

That's me, in the last commit I broke it by changing the screen size constants. Can you check again please? I pushed the fix.

[Jayy001]

Whooo, that worked!

[owulveryck]

Awesome;
I will test on my RM2 by next week, and it it works I will merge and release a new version.
Many thanks.

[owulveryck]

Very good work!

[owulveryck]

On RM2 the defaultFlip should be false as well (otherwise the image is upside down)

[owulveryck]

I will change it

[ArthurHlt]

I've just downgraded my device to 3.16.1.0 and I can confirm it spins up the webserver, looks like potentially something on the beta is breaking it. If anybody else is on v17, would appreciate the test.

root@imx8mm-ferrari:~# ZSTD_COMPRESSION=true RLE_COMPRESSION=false ./goMarkableStream
Local IP address: 192.168.0.244
Local IP address: 10.11.99.1
2024/12/21 16:20:05 listening on [::]:2001

Here's the output it should give.

I've tested also on v17 and it is blocked after giving local ip address (but this information is very early in the code). So, for now i don't know what is blocking

anyway, thanks for the great work here