How to readout current PID values on Ender 3

Run

M503

which will show all EEPROM configuration values, among them these lines:

M301 P29.34 I3.58 D60.08
M304 P427.57 I84.18 D542.91

Note that the M301 line represents the Hotend PID values whereas M304 represent the Bed PID values.

If this post helped you, please consider buying me a coffee or donating via PayPal to support research & publishing of new posts on TechOverflow