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bltouch: Recommend using a pullup on the sensor_pin 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
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
View File

@ -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
```

5
docs/Config_Reference.md
View File

@ -1552,8 +1552,9 @@ section for the details).
```
[bltouch]
sensor_pin:
# Pin connected to the BLTouch sensor pin. This parameter must be
# provided.
# Pin connected to the BLTouch sensor pin. Most BLTouch devices
# require a pullup on the sensor pin (prefix the pin name with "^").
# This parameter must be provided.
control_pin:
# Pin connected to the BLTouch control pin. This parameter must be
# provided.