BL touch with i3-plus mainboard V5.4 - where to connect the Z-Probe

Hello & good evening
I am getting really confused about installing the BL touch to my i3 plus.
I have a mainboard with the version i3-Plus Mainboard V5.4.
There is no Z-Probe 3-pin connector.
Only a Z-Min on the flat-cable.
Where should I now connect the wires exactly?
I am so done…

Bye & thank you

Can you give more information: Do you have a Mark II printer (model number In this case, you already have a sensor, already connected, right?

Yes there is already the sensor, the inductive one.
My first idea was to take the sensor out and use the wires to connect to the BLtouch.
It is officially a Wanhao i3 plus (not a Mark II) but with the Mark II board. Thats the confusing thing
When I am back at home I can give you some more Infos. On the board there is only a ZMin going into the flat cable.
Bye and thank you Fabian

If you have a 5.4 mainboard and an inductive sensor, it is a mark II. I have not made a firmware for Mark II and a BLTouch and I will probably not doing such firmware. If you replace your inductive sensor by a BLTouch, you will probably burn your BLTouch and maybe the mainboard (inductive sensor is 24v, BLTouch is 5v). DO NOT DO THAT.

Hi thanks for your reply.
Will the ADVi3 work with Mark II?
If yes, what about a try with a DC - DC voltage regulator from 24V down to 5V or 3.3V?
Could that work?
Or should I leave the sensor and just flash the Firmware?

ADVi3++ 4.0 is compatible with Mark II. Be sure to flash the right binary (it is explained in the instructions). If your printer was modified, I can’t be sure. For your DC-DC voltage regulation question, I don’t know.

Okay I will do that and lauter maybe give them a try…
Thank you

Would a 5v to 24v logic level converter not work for the bltouch… or is the 24v just power?.

I already answer. I do not know.

My Apologies Again

I Bit the bullet & took the risk… I can confirm that if a (DCtoDC - 24v to 5V or a buck converter) is put inline on the 3 pin probe connector (right pin) it will power the BLTouch Successfully.

As i have now have a MK II board can i have your permission to edit the source and attempt to integrate the BLTouch with the MK II firmware?..

EDIT :- Can i assume Arduino Core [] is the source code ?

No need for my permission. This is open source under GPLv3. You have the right to modify Marlin source code.

Just an update,

I have been playing round with the firmware in Visual Studio (OSX) and have managed to get the MK II printer to recognise it has a BLTouch. The LCD & Command line can control the BLTouch with no issues but i am unable to get the BLTouch to bed level or Z-Height.

I have modified the ribbon cable with a buck converter to allow the 24V feeding the inductive sensor to drop to 5V for the BLTouch ‘Guide will follow when BLTouch working’.

BLTouch wired as follows.
Z-MIN - P20 - White
GND-1 - P14/16 - Black
GND-2 - P14/16 - Brown
5V Vcc - P18/MOD - Red
Servo - Currently independent cable - EXT P1