I am quite new to node red and already managed some flows. But there is one thing I cannot figure out. I want to compare two temperature readings (one indoor, one outdoor)
and then send a pushover (know how to work with that node) to close the windows as the temperature outdoors is higher than indoors. The header of the pushover can be set with the node before, that worked with other flows as well.
Once you have both values in the same msg, the docs that will explain how to use the debug panel to find the right path to any data item.
Pay particular attention to the part about the buttons that appear under your mouse pointer when you over hover a debug message property in the sidebar.