I’m in the process of replacing 1.1.5 board in my Ender 5 Pro with the 4.2.7 board. I had a Bltouch connected to the old board which connected to the 1.1.5 board with a three pin connector that went to a pin 27 board that piggy backed onto the screen port and a two pin connector that went to the x axis limit switch port.
I “corrected” the wiring of the cable I already had to conform to this post on reddit as my old cable was wrong.
The new 4.2.7 has a 5 pin port for the Bltouch on the main board. My question is which connection option to use(3/2 or 5). In some reading, people who create their own firmware mention some setting you make to determine Bltouch pin assignments before compiling . I don’t know what they are as I have never tried to create my own firmware.
I found a already compiled firmware on Creality Cloud named
Ender-5 Pro HW-4.2.7 SW-V1/4/1_BLTouch-TMC2225
dated 2022-03-25 which contains a .bin file but no notes that would tell me which cabling option to use.
I’m a little apprehensive because of several “magic smoke” comments about mother boards being “fried” because of wiring mistakes. I was hoping some members might be able to offer some insight on this choice or at least reassure me that if I try either one or the other (3/2 or 5) first first I won’t damage the new board.