smart_effector: Config and command reference

Signed-off-by: Dmitry Butyugin <dmbutyugin@google.com>

docs/Config_Reference.md

@@ -1746,6 +1746,58 @@ control_pin:
 #   See the "probe" section for information on these parameters.
 ```
 
+### [smart_effector]
+Smart Effector. One may define this section instead of `[probe]` to enable
+the SmartEffector-specific features. This also enables
+[runtime commands](G-Codes.md#smart-effector) to adjust the parameters of
+the Smart Effector at run time.
+
+```
+[smart_effector]
+pin:
+#   Pin connected to the Smart Effector Z Probe output pin (pin 5). Note that
+#   pullup resistor on the board is generally not required. However, if the
+#   output pin is connected to the board pin with a pullup resistor, that
+#   resistor must be high value (e.g. 10K Ohm or more). Some boards have a low
+#   value pullup resistor on the Z probe input, which will likely result in an
+#   always-triggered probe state. In this case, connect the Smart Effector to
+#   a different pin on the board. This parameter is required.
+# control_pin:
+#   Pin connected to the Smart Effector control input pin (pin 7). If provided,
+#   Smart Effector sensitivity programming commands become available.
+# probe_accel:
+#   If set, limits the acceleration of the probing moves (in mm/sec^2).
+#   A sudden large acceleration at the beginning of the probing move may
+#   cause spurious probe triggering, especially if the hotend is heavy.
+#   To prevent that, it may be necessary to reduce the acceleration of
+#   the probing moves via this parameter.
+# recovery_time: 0.4
+#   A delay between the travel moves and the probing moves in seconds. A fast
+#   travel move prior to probing may result in a spurious probe triggering.
+#   This may cause 'Probe triggered prior to movement' errors if no delay
+#   is set. Value 0 disables the recovery delay.
+#   Default value is 0.4.
+#x_offset:
+#y_offset:
+#   Should be left unset (or set to 0).
+z_offset:
+#   Trigger height of the probe. Start with -0.1 (mm), and adjust later using
+#   `PROBE_CALIBRATE` command. This parameter must be provided.
+#speed:
+#   Speed (in mm/s) of the Z axis when probing. It is recommended to start
+#   with the probing speed of 20 mm/s and adjust it as necessary to improve
+#   the accuracy and repeatability of the probe triggering.
+#samples:
+#sample_retract_dist:
+#samples_result:
+#samples_tolerance:
+#samples_tolerance_retries:
+#activate_gcode:
+#deactivate_gcode:
+#deactivate_on_each_sample:
+#   See the "probe" section for more information on the parameters above.
+```
+
 ## Additional stepper motors and extruders
 
 ### [stepper_z1]