71 lines
1.4 KiB
Markdown
71 lines
1.4 KiB
Markdown
---
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tag: m0042
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title: Set Pin State
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brief: Set an analog or digital pin to a specified state.
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author: thinkyhead
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requires: DIRECT_PIN_CONTROL
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group: control
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codes: [ M42 ]
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notes:
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parameters:
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-
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tag: I
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optional: true
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since: 1.1.9.1
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description: Ignore protection on pins that Marlin is using.
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values:
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-
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type: bool
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-
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tag: T
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optional: true
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since: 2.0.5.2
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description: Set the pin mode. Prior to Marlin 2.0.9.4 this is set with the `M` parameter.
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values:
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-
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tag: 0
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description: '`INPUT`'
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-
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tag: 1
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description: '`OUTPUT`'
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-
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tag: 2
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description: '`INPUT_PULLUP`'
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-
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tag: 3
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description: '`INPUT_PULLDOWN`'
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-
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tag: P
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optional: true
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description: A digital pin number (even for analog pins) to write to. (`LED_PIN` if omitted)
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values:
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-
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tag: pin
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type: int
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-
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tag: S
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optional: false
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description: The state to set. PWM pins may be set from 0-255.
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values:
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-
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tag: state
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type: int
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examples:
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-
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pre: Turn the LED pin on
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code: M42 S1
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-
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pre: Turn on pin 33
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code: M42 P33 S1
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-
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pre: Set pin 44 to do PWM with 50% DC
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code: M42 P44 S128
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---
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For custom hardware not officially supported in Marlin, you can often just connect up an unused pin and use [`M42`](/docs/gcode/M042.html) to control it.
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