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authorKevin O'Connor <kevin@koconnor.net>2020-12-09 13:22:40 -0500
committerKevin O'Connor <kevin@koconnor.net>2020-12-11 11:01:44 -0500
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tree7eec31d03c22b2b16d933e9ec05f9247ed431718 /docs/BLTouch.md
parentf3c5be0f003696966a299c936a8a7c05bf4465ff (diff)
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bltouch: Recommend using a pullup on the sensor_pin
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Diffstat (limited to 'docs/BLTouch.md')
-rw-r--r--docs/BLTouch.md6
1 files changed, 4 insertions, 2 deletions
diff --git a/docs/BLTouch.md b/docs/BLTouch.md
index 3a5c6ba6..0f97bc91 100644
--- a/docs/BLTouch.md
+++ b/docs/BLTouch.md
@@ -10,11 +10,13 @@ Hook up the BL-Touch "servo" connector to a `control_pin` according to
the BL-Touch documentation or your MCU documentation. Using the
original wiring, the yellow wire from the triple is the `control_pin`
and the white wire from the pair is the `sensor_pin`. You need to
-configure these pins according to your wiring. For example:
+configure these pins according to your wiring. Most BL-Touch devices
+require a pullup on the sensor pin (prefix the pin name with "^"). For
+example:
```
[bltouch]
-sensor_pin: P1.24
+sensor_pin: ^P1.24
control_pin: P1.26
```