We have so many internal project names. I think this one came from a list of fantasy beasts. It's the name that collects a whole range of packages on our linux board into 1.
(It contains "opinicus", "griffin-display", "jedi-marlin" as main components for example. I could go into the overall architecture in a different post)
Case leds can be set with M142 r[0-255] g[0-255] b[0-255] w[0-255] right now. However, this is currently a side-effect of the implementation, and for example the web API will not know the colors have changed. I will try to fix this soon in an update, so I can put it on the official list.
The head leds are controlled by the system and used to indicate status. Due to the same implementation side effect you can try setting them with M143 r[0-255] g[0-255] b[0-255] T[0-1], but this isn't officially supported, and thus might stop working in the future.
Insider joke. We use mythical creatures for work titles for projects. This one kinda stuck.
Not sure. But the printer has a REST-full API that allows you to do it. This also resulted in the quire infamous disco.py script that made all the printers at the UM HQ go into party mode (Don't worry, now you can't do it without authentication anymore)
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