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In my opinion, Node-Red is a GUI for node.js. It allows you to easily generate complex programs with a simple to use and understand User Interface. I don't know node.js and when I look at the code I've generated from my flows, I really have to sloooowly go thru the lines to try to understand what it taking place.

If I ever log into the GUI on my pi(its logged into CLI because of power reasons and I don't want to have to reload all the programs running on it) I'll give it a try. Thanks for explaining it to me.