I used some spare time to hack a bit on the VNC viewer I published here before, KindleVNCviewer (
https://www.mobileread.com/forums/sho...d.php?t=150434). I reused framebuffer code from Koreader and now it also works on Kobos. Thus, I decided a slight rename: It is now known as "kvncviewer" :-)
Source code is available on github in the place where the old codebase could be found:
http://github.com/hwhw/kindlevncviewer (name change not reflected here since I like my URIs to be stable)
The new code brings some new options. It is written in Lua, and that I took a bit further than with the old codebase, which used Lua for configuration, too. The new code is implemented using LuaJIT. It re-uses the framebuffer code from Koreader and is quite versatile. It allows for rotation options, b&w dithering on all devices, configurable refresh timeouts (though this won't make your screen faster than the hardware can do, but you might want to fiddle with the options and report your experiences here) and some more things I forgot about.
Attached is the compiled version for Kobos.
It comes without a way to start it. That's for a reason, though: you probably want to use it via USB networking anyway. In that case, the shell access provided by USB networking is arguably the best way to start the viewer, too. If noone beats me to it (feel invited!), I'll try to make up a script for the default Kobo USB networking setup.