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bltouch: Recommend using a pullup on the sensor_pin

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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Kevin O'Connor 2020-12-09 13:22:40 -05:00
parent f3c5be0f00
commit 2d6b44152a
2 changed files with 7 additions and 4 deletions
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6
docs/BLTouch.md
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@ -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
```