I'm using Ender 3 Neo with OctoPi, which is powered by the printer's PSU with a step-down converter. I would like to be able to send a shutdown command to OctoPi from the printer's menu. I believe I saw somewhere information on how to do that, but I didn't save a link and now I can't find any information about it.
Is that still possible to accomplish my goal? If yes, could you please share how to set it up or could you please point out where I can find some guidance?