Recommended · for some experience
Creality 32 bit V4 board guide - Ender 3 V2, BLtouch & more
Why people recommend it
Covers compiling Marlin for Creality's 32-bit V4 board and adding a BLTouch probe; recommended for Ender 3 upgrades, though its wiring assumes earlier videos.
Watch for: BLTouch firmware changes from about 13:12
In their words
If I were doing your upgrade in your place, I would refer to this video for how to compile the firmware for the correct board.
Rykara on 3dprinting.stackexchange.com, Mar 2021. CC BY-SA.
I found this schematic from a YouTube video which uses a different sensor:
Bob Ortiz on 3dprinting.stackexchange.com, Dec 2023. CC BY-SA.
The wiring diagram has used the Z endstop connector for the BLTouch, I've followed this video, but clearly the wiring mechanic is different.
ANS on 3dprinting.stackexchange.com, Feb 2021. CC BY-SA.