FEATURE REQUEST : Waiting serial message from motherboard to trig

[studiodyne]

Hi , is it possible your plugin, waiting for a serial message like ' power loss' or anything that will be sent by the board.

Why , for all that use UPS , we poll a pin that inform about power loss.
The board send a serial message
Your plugin start to backup

Easy to code...
And you will have the only one system that can produce a true robust power loss system for octoprint

May be ... In marlin there is a creality feature ' power loss' , may be this feature can send a message without sdcard printing
If necessary I can write a feature for your plugin on marlin 2.1

Thanks for your job