KlikyNG Probe unconsitant state

[ShadowMaster971]

Basic Information:

Printer Model: VORON Legacy
MCU / Printerboard: BTT SKR 1.4
klippy-Legacy-31012024.log (1002.5 KB)

Describe your issue:

I Good morning,
I set up a VORON Legacy with an SKR1.4, a Raspberry Pi Zero 2W and a Klicky probe connected to the pins of the BL-Touch under Klipper Firmware. It turns out that when I ask for the status of the EndStops, I can get the right result or I can get the wrong one after 3 or 4 tests in a row.
I think it’s a communication problem between the Pi Zero 2W and the SKR1.4 since I had to put them in serial communication due to lack of suitable USB connectors.

Can you help me resolve my problem?

[jakep_82]

I’m not sure if the port you’re using for this probe has a hardware pullup on it. You should enable the pullup in your config to make sure. If the pin doesn’t have a hardware pullup, it can be in a floating state which would cause the issues you’re seeing.

[probe]
pin = ^P0.10
x_offset = 0
y_offset = 19.75
z_offset = 6.42
speed = 5
samples = 3
samples_result = median
sample_retract_dist = 2.0
samples_tolerance = 0.01
samples_tolerance_retries = 3
lift_speed = 15.0

[ShadowMaster971]

I just test your advice and now Docked or Undocked the result is Triggered

20:46 _CheckProbe 20:46 probe: TRIGGERED 20:46 _CheckProbe 20:46 probe: TRIGGERED 20:46 _CheckProbe 20:46 probe: TRIGGERED 20:46 _CheckProbe 20:46 probe: TRIGGERED 20:46 QUERY_PROBE 20:46 probe: TRIGGERED 20:46 QUERY_PROBE 20:46 probe: TRIGGERED 20:46 QUERY_PROBE 20:47 probe: TRIGGERED 20:47 QUERY_PROBE 20:47 probe: TRIGGERED

The probe is attached to the toolhead

[jakep_82]

How is it wired? It should be connected to ground and the pin you have defined

[ShadowMaster971]

And it’s how it is

[ShadowMaster971]

The yellow wires

[ShadowMaster971]

I have re done the Probe Mount with a multimeter in Continuity mode and test each step with the Klipper Console.
It’s done;