@droftarts I can confirm the miswiring causes the z probe to not report back to the main board. I tried many times and while the probe would deploy it would not show any value in the UI but 0 when manually touched.
My 4th was just delivered and after swapping it out it worked perfectly instantly. With the wrong wires going to ground and the Z probe acting as the 5V had fired something for sure.
With the 2nd one I did 100% hear a pop when I issued the M401 command.
@nuramori Ah my misunderstanding, but also yes haha. The BLTouch when retracted is barely above the height of the nozzle
@nuramori Unfortunately it happened during the initial probe process, at that point the z offset doesn't really take effect. It will stop when the probe trigger is detected, the offset comes into effect when doing the print operation itself. To be safe I also set a very low initial offset so I can adjust from there
@droftarts Genuine as far as I can tell. Sadly when I tried to use the sensor to level it just drove the bed into the nozzle and would give the alarm flashing on the BLTouch. Pretty sure pumping 5V through the Z Probe killed something that is preventing it from sending a signal back.
And no problem 
This was an expensive lesson and I want to make sure others have the info needed to prevent it from happening to them
@Nuramori sadly my platform doesn't stop moving and drives into the nozzle and the BLTouch alarm activates. Oh well, lessons learned right? haha
@dc42 Thank you From all apperances and what not it appears to be genuine but in a Creality CR-10 V2 kit. I saw posts elsewhere of 2 others who had this happen, it could be the sellers and including alternate cabling or something.
Thank you! I thought that was the case but was unsure. I will make that change in the config It would be good if the RRF Config Tool can be updated when configuring the BLTouch on the Duet 3 to remove the pull up, if that is possible
Just got it connected and while it deploys and retracts properly now, it doesn't send back that the Z has been triggered. It detects it in the probe itself, the light lights up and everything, but nothing in the DWC. The Z stays at 0. Willing to bet putting 5V through the Z probe fired something. Now I am down 3 BLTouches. Yay.
I found the problem and OMG I am livid.
The colours for the wires from my BLTouch are not the ones from the documentation at all.
The pattern on mine is as follows (From left to right)
White, Black, Yellow, Blue, Red.
So this means the pin layout is
Red = io7.in (Z Probe Pin)
White + Blue = GND
Yellow = io7.out (Servo Control)
Black = 5V
The only colour that matched up is Yellow. I am extremely surprised the BLTouch is still working with just about everything connected incorrectly.
The probe is working now, at least in testing. I need to fix the wiring going to the actual print carriage and put it through its paces
A small update.
I found this post: https://forum.duet3d.com/topic/18261/bltouch-v3-1-toolboard-resolution
I followed their steps and when M280 P0 S60 is issued the LED will light up. However when the M280 P0 S120 is issued the LED become starts flashing rapidly and very dimly and just doesn't seem to do anything.
When I issue M280 P0 S10 the LED turns off entirely and it doesn't seem to do anything. The Z in the interface also stays at 0 and doesn't change to 1000.
I am getting super annoyed at this. It should just work but yet just doesn't want to. Ugh haha
I have been trying to get a BLTouch setup on the Duet 3 for a little while now but have so far blown 2 BLTouchs trying to get it setup. I have a 3rd but am a tad terrified connect it cause if it blows I really can't justify to my wife getting a 4th (she doesn't know about the 3rd... I will pay for that later)
I know it is blown because when I issue the M280 command to test I hear a loud pop from the BLTouch and the PCB becomes extremely hot to the touch when connected to power after that.
There is lots of conflicting info out there for the Duet 3 from what I can tell. In the documentation it shows the wiring layout and what to connect where, but then in the configurator I see it says to connect power to 3.3v instead of 5v. Then I use the config tool to create the config.g file, but it's config is different for the Z than I have seen in others using the same pin layout I am. I am especially confused as RRF Config Tool adds the pull up resistor to io7.in but in other configs posts I don't see that included and the documentation it seems it isn't needed on io7.
Just wondering is someone can help guide me in the right direction.
config.g Z-Probe
; Z-Probe
M950 S0 C"io7.out" ; create servo pin 0 for BLTouch
M558 P9 C"^io7.in" H5 F120 T6000 ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X10 Y-35 Z2.5 ; set Z probe trigger value, offset and trigger height
M557 X15:215 Y15:195 S20 ; define mesh grid
deployprobe.g
M280 P0 S10 ; deploy BLTouch
retractprobe.g
M280 P0 S90 ; retract BLTouch
Wiring: