BLTouch with TH3D Ender 3 pro
After setting up the BLTouch in firmware, you need to activate the leveling function for every print by inserting the leveling G-code 'G29' in the start G-code script of your slicer. The code should be placed directly after command G28.

Note that you can test the working of the sensor from the printer display: sensor can be deployed, stowed, reset and tested.