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keyboard/zmk/docs/docs/behaviors/outputs.md
kemonine dec50b3d3f update zmk sources
2020-11-21 19:34:43 -05:00

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Output Selection Behavior Output Selection

Summary

The output behavior allows selecting whether keyboard output is sent to the USB or bluetooth connection when both are connected. This allows connecting a keyboard to USB for power but outputting to a different device over bluetooth.

By default, output is sent to USB when both USB and BLE are connected. Once you select a different output, it will be remembered until you change it again.

Output Command Defines

Output command defines are provided through the dt-bindings/zmk/outputs.h header, which is added at the top of the keymap file:

#include <dt-bindings/zmk/outputs.h>

This allows you to reference the actions defined in this header:

Define Action
OUT_USB Prefer sending to USB
OUT_BLE Prefer sending to the current bluetooth profile
OUT_TOG Toggle between USB and BLE

Output Selection Behavior

The output selection behavior changes the preferred output on press.

Behavior Binding

  • Reference: &out
  • Parameter #1: Command, e.g. OUT_BLE

Examples

  1. Behavior binding to prefer sending keyboard output to USB

    &out OUT_USB

  2. Behavior binding to prefer sending keyboard output to the current bluetooth profile

    &out OUT_BLE

  3. Behavior binding to toggle between preferring USB and BLE

    &out OUT_TOG