I have a question about the letters
A
E
P
W
What do they stand for?
I have searched for hours and i cant find the anwser.
I know they are temperature related but i need to know what exactly.
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Hello @ninja06 !
In what context exactly?
Maybe as part of a gcode command?
Then it depends on the gcode.
Is it a Prusa printer? I know they produce temperature report lines like this:
T:199.5 /200.0 B:60.2 /60.0 T0:199.5 /200.0 @:75 B@:23 P:0.0 A:35.6
According to their docs, P is the temperature of the PINDA probe, A is ambient.
W is a countdown timer for when the target of the bed will be reached, in a blocking heating command. I'm not sure what E would be, but it was probably reported at some point by the printer, and currently OctoApp is the only client that will just display everything.
Yeah its a prusa printer.
Thanks for clarification 
I wonder if E would be for "Extruder Temp" but that is already represented by "Hot End"
I've never seen E or W show anything but 0 so I wonder how/if we could make use of them?
Perhaps would be cool if we had an insulated enclosure with a temp probe and maybe exhaust fan to control the temp inside the enclosure