zmk_mf68/docs/docs/behaviors/bluetooth.md

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Bluetooth Behavior Bluetooth

Summary

The bluetooth behavior allows management of various settings and states related to the bluetooth connection(s) between the keyboard and the host. By default, ZMK supports five "profiles" for selecting which bonded host computer/laptop/keyboard should receive the keyboard input; many of the commands here operation on those profiles.

:::note Number of Profiles Please note there are only five available Bluetooth profiles by default. If you need to increase the number of available profiles you can set CONFIG_BT_MAX_CONN in your zmk-config .conf file. :::

Bluetooth Command Defines

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

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

This will allow you to reference the actions defined in this header such as BT_CLR.

Here is a table describing the command for each define:

Define Action
BT_CLR Clear bond information between the keyboard and host for the selected profile.
BT_NXT Switch to the next profile, cycling through to the first one when the end is reached.
BT_PRV Switch to the previous profile, cycling through to the last one when the beginning is reached.
BT_SEL Select the 0-indexed profile by number. Please note: this definition must include a number as an argument in the keymap to work correctly. eg. BT_SEL 0

Bluetooth Behavior

The bluetooth behavior completes an bluetooth action given on press.

Behavior Binding

  • Reference: &bt
  • Parameter #1: The bluetooth command define, e.g. BT_CLR
  • Parameter #2: Only applies to BT_SEL and is the 0-indexed profile by number

Examples

  1. Behavior binding to clear the paired host for the selected profile:

    &bt BT_CLR
    
  2. Behavior binding to select the next profile:

    &bt BT_NXT
    
  3. Behavior binding to select the previous profile:

    &bt BT_PRV
    
  4. Behavior binding to select the 2nd profile (passed parameters are zero based):

    &bt BT_SEL 1