From 7c995b19d3bc19ac191ab586ab96d95728e74667 Mon Sep 17 00:00:00 2001
From: Robert Bricheno <github2@ambrosia.org.uk>
Date: Wed, 8 Jul 2026 10:02:27 +0100
Subject: [PATCH] Add pull-up resistor

---
 CONFIGURATION.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/CONFIGURATION.md b/CONFIGURATION.md
index 0794a80..e4b460b 100644
--- a/CONFIGURATION.md
+++ b/CONFIGURATION.md
@@ -44,7 +44,8 @@ Add the `calibrate_offsets.cfg` sample below, read the comments, and make sure y
 # These two values should be changed or checked.
 #
 # 'pin' should reference the pin used for Nudge.
-pin: z:PC0
+# Add a pull-up resistor because this is like an endstop.
+pin: ^z:PC0
 # 'spread' is the amount of X or Y motion used in the probing sequence.
 # Think of it as the clearance from the center, to accomodate the pin's diameter and any
 # initial starting-point inaccuracy.