qmk_firmware/docs/reference_info_json.md

info.json Reference :id=info-json-reference

The information contained in info.json is combined with the config.h and rules.mk files, dynamically generating the necessary configuration for your keyboard at compile time. It is also used by the QMK API, and contains the information QMK Configurator needs to display a representation of your keyboard. Its key/value pairs are ruled by the data/schemas/keyboard.jsonschema file. To learn more about the why and how of the schema file see the Data Driven Configuration page.

You can create info.json files at every level under qmk_firmware/keyboards/<keyboard_name>. These files are combined, with more specific files overriding keys in less specific files. This means you do not need to duplicate your metadata information. For example, qmk_firmware/keyboards/clueboard/info.json specifies information common to all Clueboard products, such as manufacturer and maintainer, while qmk_firmware/keyboards/clueboard/66/info.json contains more specific information about Clueboard 66%.

General Metadata :id=general-metadata

• keyboard_name (Required)
  • A free-form text string describing the keyboard. This will be used as the USB product string. Can include Unicode characters, escaped to ASCII eg. \u03A8 (Ψ).
  • Example: "Clueboard 66%"
• maintainer (Required)
  • GitHub username of the maintainer, or qmk for community maintained boards.
  • Example: "skullydazed"
• manufacturer (Required)
  • A free-form text string describing the keyboard's manufacturer. This will be used as the USB manufacturer string. Can include Unicode characters, escaped to ASCII eg. \u03A8 (Ψ).
  • Example: "Clueboard"
• url (Required)
  • A URL to the keyboard's product page, QMK.fm/keyboards page, or other page describing information about the keyboard.
  • Example: "https://clueboard.co"
• bootloader_instructions
  • Instructions for putting the keyboard into a mode that allows for firmware flashing.
  • Example: "Press the button marked RESET on the back of the PCB"
• tags
  • A list of tags describing the keyboard.
  • Example: ["ortho", "split", "rgb"]

Hardware Configuration :id=hardware-configuration

• board
  • Override the default ChibiOS board name (ARM-based keyboards only).
  • Example: "BLACKPILL_STM32_F411"
• bootloader
  • The bootloader in use on the keyboard. Required if development_board is not specified.
• development_board
  • The microcontroller development board, if applicable.
  • Example: "promicro"
• pin_compatible
  • The form factor of the development board, if applicable. Must be one of elite_c, promicro.
• processor
  • The microcontroller in use on the keyboard. Required if development_board is not specified.

Firmware Configuration :id=firmware-configuration

• build
  • debounce_type
    • The debounce algorithm to use. Must be one of asym_eager_defer_pk, custom, sym_defer_g, sym_defer_pk, sym_defer_pr, sym_eager_pk, sym_eager_pr.
  • firmware_format
    • The format of the final output binary. Must be one of bin, hex, uf2.
  • lto
    • Enable Link-Time Optimization.
    • Default: false
• features
  • A dictionary of features to enable or disable.
  • Example:

  {
      "rgb_matrix": true,
      "rgblight": false
  }
  

• qmk
  • tap_capslock_delay
    • The delay between keydown and keyup for Caps Lock tap events in milliseconds.
    • Default: 80 (80 ms)
  • tap_keycode_delay
    • The delay between keydown and keyup for tap events in milliseconds.
    • Default: 0 (no delay)
• tapping
  • hold_on_other_key_press
    • Default: false
  • hold_on_other_key_press_per_key
    • Default: false
  • permissive_hold
    • Default: false
  • permissive_hold_per_key
    • Default: false
  • retro
    • Default: false
  • retro_per_key
    • Default: false
  • term
    • Default: 200 (200 ms)
  • term_per_key
    • Default: false
  • toggle
    • Default: 5

APA102 :id=apa102

Configures the APA102 driver.

• apa102
  • clock_pin (Required)
    • The GPIO pin connected to CI on the first LED in the chain.
  • data_pin (Required)
    • The GPIO pin connected to DI on the first LED in the chain.
  • default_brightness
    • The initial global brightness level (independent of the RGB data), from 0 to 31.
    • Default: 31

Audio :id=audio

Configures the Audio feature.

• audio
  • macro_beep
    • Play a short beep for \a (ASCII BEL) characters in Send String macros.
    • Default: false
  • pins (Required)
    • The GPIO pin(s) connected to the speaker(s).
  • voices
    • Use multiple audio voices.
    • Default: false

Backlight :id=backlight

Configures the Backlight feature.

• backlight
  • as_caps_lock
    • Use the backlight as a Caps Lock indicator.
    • Default: false
  • breathing
    • Whether backlight breathing is enabled.
    • Default: false
  • breathing_period
    • The length of one backlight breathing cycle in seconds.
    • Default: 6 (6 seconds)
  • driver
    • The driver to use. Must be one of custom, pwm, software, timer.
    • Default: "pwm"
  • levels
    • The number of brightness levels (excluding off), from 1 to 31.
    • Default: 3
  • max_brightness
    • The maximum PWM value which brightness is scaled to, from 0 to 255.
    • Default: 255
  • on_state
    • The logical GPIO state required to turn the LEDs on.
    • Default: 1 (on = high)
  • pin
    • The GPIO pin connected to the backlight circuit.
  • pins
    • A list of GPIO pins connected to the backlight LEDs (software and timer drivers only).

Bluetooth :id=bluetooth

Configures the Bluetooth feature.

• bluetooth
  • driver
    • The driver to use. Must be one of custom, bluefruit_le, rn42.

Bootmagic :id=bootmagic

Configures the Bootmagic feature.

• bootmagic
  • enabled
    • Enables the Bootmagic feature.
    • Default: false
  • matrix
    • The matrix position of the key to check during startup. This should generally be set to the (physically) top left key.
    • Default: [0, 0]

Caps Word :id=caps-word

Configures the Caps Word feature.

• caps_word
  • both_shifts_turns_on
    • Activate Caps Word by pressing both Shift keys.
    • Default: false
  • double_tap_shift_turns_on
    • Activate Caps Word by pressing Left Shift twice.
    • Default: false
  • enabled
    • Enables the Caps Word feature.
    • Default: false
  • idle_timeout
    • The amount of time before Caps Word automatically deactivates in milliseconds.
    • Default: 5000 (5 seconds)
  • invert_on_shift
    • Invert shift state instead of deactivating Caps Word when Shift is pressed.
    • Default: false

Combo :id=combo

Configures the Combo feature.

• combo
  • term
    • The amount of time to recognize a combo in milliseconds.
    • Default: 50 (50 ms)

EEPROM :id=eeprom

Configures the EEPROM driver.

• eeprom
  • driver
    • The EEPROM backend to use. Must be one of custom, i2c, legacy_stm32_flash, spi, transient, vendor, wear_leveling.
    • Default: "vendor"
  • wear_leveling
    • driver
      • The driver to use. Must be one of embedded_flash, legacy, rp2040_flash, spi_flash, custom.
    • backing_size
      • Number of bytes used by the wear-leveling algorithm for its underlying storage, and needs to be a multiple of the logical size.
    • logical_size
      • Number of bytes “exposed” to the rest of QMK and denotes the size of the usable EEPROM.

Encoder :id=encoder

Configures the Encoder feature.

• encoder
  • rotary
    • A list of encoder objects.
      • pin_a (Required)
        • The GPIO pin connected to the encoder's A pin.
      • pin_b (Required)
        • The GPIO pin connected to the encoder's B pin.
      • resolution
        • The number of edge transitions on both pins required to register an input.
        • Default: 4

Indicators :id=indicators

Configures the LED Indicators feature.

• indicators
  • caps_lock
    • The GPIO pin connected to the Caps Lock LED.
  • compose
    • The GPIO pin connected to the Compose LED.
  • kana
    • The GPIO pin connected to the Kana LED.
  • num_lock
    • The GPIO pin connected to the Num Lock LED.
  • on_state
    • The logical GPIO state required to turn the LEDs on.
    • Default: 1 (on = high)
  • scroll_lock
    • The GPIO pin connected to the Scroll Lock LED.

Layouts :id=layouts

The layouts portion of the dictionary contains several nested dictionaries. The outer layer consists of QMK layout names, for example LAYOUT_60_ansi or LAYOUT_60_iso.

Each key dictionary in a layout describes the physical properties of a key. If you are familiar with the Raw Data format for Keyboard Layout Editor, you will find many of the concepts the same. Key names and layout choices are reused wherever possible, but unlike KLE each key is stateless, inheriting no properties from the keys that came before it.

All key positions and rotations are specified in relation to the top-left corner of the keyboard, and the top-left corner of each key.

The ISO enter key is represented by a 1.25u×2uh key. Renderers which utilize info.json layout data (such as qmk info -l and the QMK Configurator) should display this key as expected.

• community_layouts
  • A list of community layouts supported by the keyboard.
  • Example: ["60_ansi", "60_iso"]
• layout_aliases
  • A mapping of layout aliases to layout definitions.
  • Example:

  {
      "LAYOUT_ansi": "LAYOUT_60_ansi",
      "LAYOUT_iso": "LAYOUT_60_iso"
  }
  

• layouts
  • A dictionary of layouts supported by the keyboard.
  • LAYOUT_<layout_name>
    • layout
      • A list of key dictionaries comprising the layout. Each key dictionary contains:
        • matrix (Required)
          • The matrix position for the key.
          • Example: [0, 4] (row 0, column 4)
        • x (Required)
          • The absolute position of the key in the horizontal axis, in key units.
        • y (Required)
          • The absolute position of the key in the vertical axis, in key units.
        • h
          • The height of the key, in key units.
          • Default: 1 (1u)
        • label
          • What to name the key. This is not a key assignment as in the keymap, but should usually correspond to the keycode for the first layer of the default keymap.
          • Example: "Escape"
        • r
          • The rotation angle in degrees. Currently not implemented.
        • rx
          • The absolute X position of the rotation axis. Currently not implemented.
        • ry
          • The absolute Y position of the rotation axis. Currently not implemented.
        • w
          • The width of the key, in key units.
          • Default: 1 (1u)
        • Example: {"label": "Shift", "matrix": [4, 0], "x": 0, "y": 4.25, "w": 2.25}

Leader Key :id=leader-key

Configures the Leader Key feature.

• leader_key
  • timing
    • Reset the timeout on each keypress.
    • Default: false
  • strict_processing
    • Do not extract the tap keycodes from Layer-Tap and Mod-Tap key events.
    • Default: false
  • timeout
    • The amount of time to complete a leader sequence in milliseconds.
    • Default: 300 (300 ms)

LED Matrix :id=led-matrix

Configures the LED Matrix feature.

• led_matrix
  • animations
    • A dictionary of effects to enable or disable. Effects which are absent default to false.
    • Example:

    {
        "alpha_mods": true,
        "breathing": true,
        "cycle_left_right": false
    }
    

  • center_point
    • The centroid (geometric center) of the LEDs. Used for certain effects.
    • Default: [112, 32]
  • driver (Required)
    • The driver to use. Must be one of custom, is31fl3218, is31fl3731, is31fl3733, is31fl3736, is31fl3737, is31fl3741, is31fl3742a, is31fl3743a, is31fl3745, is31fl3746a, snled27351.
  • layout (Required)
    • List of LED configuration dictionaries. Each dictionary contains:
      • flags (Required)
        • A bitfield of flags describing the type of LED.
      • x (Required)
        • The position of the LED in the horizontal axis, from 0 to 224.
      • y (Required)
        • The position of the LED in the vertical axis, from 0 to 64.
      • matrix
        • The key matrix position associated with the LED.
        • Example: [0, 2]
      • Example: {"matrix": [2, 1], "x": 20, "y": 48, "flags": 2}
  • led_flush_limit
    • Limits in milliseconds how frequently an animation will update the LEDs.
    • Default: 16
  • led_process_limit
    • Limits the number of LEDs to process in an animation per task run (increases keyboard responsiveness).
    • Default: led_count / 5
  • max_brightness
    • The maximum value which brightness is scaled to, from 0 to 255.
    • Default: 255
  • react_on_keyup
    • Animations react to keyup instead of keydown.
    • Default: false
  • sleep
    • Turn off the LEDs when the host goes to sleep.
    • Default: false
  • speed_steps
    • The number of speed adjustment steps.
    • Default: 16
  • split_count
    • For split keyboards, the number of LEDs on each half.
    • Example: [16, 16]
  • timeout
    • The LED activity timeout in milliseconds.
    • Default: 0 (no timeout)
  • val_steps
    • The number of brightness adjustment steps.
    • Default: 8

Matrix :id=matrix

• debounce
  • The debounce time in milliseconds.
  • Default: 5 (5 ms)
• diode_direction
  • Which way the diodes are "pointing". Unused for matrix_pins.direct. Must be one of COL2ROW, ROW2COL.
• matrix_pins
  • cols
    • A list of GPIO pins connected to the matrix columns.
    • Example: ["A0", "A1", "A2"]
  • custom
    • Whether to use a custom matrix scanning implementation.
    • Default: false
  • custom_lite
    • Whether to use a "lite" custom matrix scanning implementation.
    • Default: false
  • direct
    • A 2-dimensional list of GPIO pins connected to each keyswitch, forming the "matrix" rows and columns.
    • Example:

    [
        ["A0", "A1", "A2"],
        ["B0", "B1", "B2"],
        ["C0", "C1", "C2"]
    ]
    

  • ghost
    • Whether the matrix has no anti-ghosting diodes.
    • Default: false
  • input_pressed_state
    • The logical GPIO state of the input pins when a key is pressed.
    • Default: 0 (pressed = low)
  • io_delay
    • The amount of time to wait between row/col selection and col/row pin reading, in microseconds.
    • Default: 30 (30 µs)
  • rows
    • A list of GPIO pins connected to the matrix rows.
    • Example: ["B0", "B1", "B2"]

Mouse Keys :id=mouse-keys

Configures the Mouse Keys feature.

• mouse_key
  • delay
  • enabled
    • Enables the Mouse Keys feature.
    • Default: false
  • interval
  • max_speed
  • time_to_max
  • wheel_delay

One Shot :id=one-shot

Configures One Shot keys.

• oneshot
  • tap_toggle
    • The number of times to tap the key in order to hold it.
  • timeout
    • The amount of time before the key is released in milliseconds.

PS/2 :id=ps2

Configures the PS/2 feature.

• ps2
  • clock_pin
    • The GPIO pin connected to CLK on the PS/2 device.
  • data_pin
    • The GPIO pin connected to DATA on the PS/2 device.
  • driver
    • The PS/2 driver to use. Must be one of busywait, interrupt, usart, vendor.
    • Default: "busywait"
  • enabled
    • Enable the PS/2 feature.
    • Default: false
  • mouse_enabled
    • Enable the PS/2 mouse handling.
    • Default: false

QMK LUFA Bootloader :id=qmk-lufa-bootloader

• qmk_lufa_bootloader
  • esc_input (Required)
    • The GPIO pin connected to the designated "exit bootloader" key's row (if COL2ROW).
  • esc_output (Required)
    • The GPIO pin connected to the designated "exit bootloader" key's column (if COL2ROW).
  • led
    • The GPIO pin connected to an LED to flash.
  • speaker
    • The GPIO pin connected to a speaker to click (can also be used for a second LED).

RGBLight :id=rgblight

Configures the RGB Lighting feature.

• rgblight
  • led_count (Required)
    • The number of LEDs in the chain.
  • animations
    • A dictionary of effects to enable or disable. Effects which are absent default to false.
    • Example:

    {
        "breathing": true,
        "rainbow_mood": true,
        "snake": false
    }
    

  • brightness_steps
    • The number of brightness adjustment steps.
    • Default: 17
  • driver
    • The driver to use. Must be one of apa102, custom, ws2812.
    • Default: "ws2812"
  • hue_steps
    • The number of hue adjustment steps.
    • Default: 8
  • layers
    • blink
      • Enable layer blinking API.
      • Default: false
    • enabled
      • Enable RGB Lighting Layers.
      • Default: false
    • max
      • The maximum layer count, from 1 to 32.
      • Default: 8
  • led_map
    • Remap LED indices.
    • Example: [4, 3, 2, 1, 0]
  • max_brightness
    • The maximum value which the HSV "V" component is scaled to, from 0 to 255.
    • Default: 255
  • rgbw
    • Enable RGBW LEDs.
    • Default: false
  • saturation_steps
    • The number of saturation adjustment steps.
    • Default: 17
  • sleep
    • Turn off the LEDs when the host goes to sleep.
    • Default: false
  • split
    • Enable synchronization between split halves.
    • Default: false
  • split_count
    • When rgblight.split is enabled, the number of LEDs on each half.
    • Example: [10, 10]

RGB Matrix :id=rgb-matrix

Configures the RGB Matrix feature.

• rgb_matrix
  • animations
    • A dictionary of effects to enable or disable. Effects which are absent default to false.
    • Example:

    {
        "alpha_mods": true,
        "breathing": true,
        "cycle_left_right": false
    }
    

  • center_point
    • The centroid (geometric center) of the LEDs. Used for certain effects.
    • Default: [112, 32]
  • driver (Required)
    • The driver to use. Must be one of aw20216s, custom, is31fl3218, is31fl3731, is31fl3733, is31fl3736, is31fl3737, is31fl3741, is31fl3742a, is31fl3743a, is31fl3745, is31fl3746a, snled27351, ws2812.
  • hue_steps
    • The number of hue adjustment steps.
    • Default: 8
  • layout (Required)
    • List of LED configuration dictionaries. Each dictionary contains:
      • flags (Required)
        • A bitfield of flags describing the type of LED.
      • x (Required)
        • The position of the LED in the horizontal axis, from 0 to 224.
      • y (Required)
        • The position of the LED in the vertical axis, from 0 to 64.
      • matrix
        • The key matrix position associated with the LED.
        • Example: [0, 2]
      • Example: {"matrix": [2, 1], "x": 20, "y": 48, "flags": 2}
  • led_flush_limit
    • Limits in milliseconds how frequently an animation will update the LEDs.
    • Default: 16
  • led_process_limit
    • Limits the number of LEDs to process in an animation per task run (increases keyboard responsiveness).
    • Default: led_count / 5
  • max_brightness
    • The maximum value which the HSV "V" component is scaled to, from 0 to 255.
    • Default: 255
  • react_on_keyup
    • Animations react to keyup instead of keydown.
    • Default: false
  • sat_steps
    • The number of saturation adjustment steps.
    • Default: 16
  • sleep
    • Turn off the LEDs when the host goes to sleep.
    • Default: false
  • speed_steps
    • The number of speed adjustment steps.
    • Default: 16
  • split_count
    • For split keyboards, the number of LEDs on each half.
    • Example: [16, 16]
  • timeout
    • The LED activity timeout in milliseconds.
    • Default: 0 (no timeout)
  • val_steps
    • The number of brightness adjustment steps.
    • Default: 16

Secure :id=secure

Configures the Secure feature.

• secure
  • enabled
    • Enable the Secure feature.
    • Default: false
  • idle_timeout
    • Timeout while unlocked before returning to the locked state. Set to 0 to disable.
    • Default: 60000 (1 minute)
  • unlock_sequence
    • A list of up to five matrix locations comprising the "unlock sequence".
    • Example: [[0, 0], [0, 1], [4, 3]]
  • unlock_timeout
    • Timeout for the user to perform the unlock sequence. Set to 0 to disable.
    • Default: 5000 (5 seconds)

Split Keyboard :id=split-keyboard

Configures the Split Keyboard feature.

• split
  • bootmagic
    • matrix
      • See Bootmagic config.
  • enabled
    • Enable the Split Keyboard feature.
    • Default: false
  • encoder
    • right
      • rotary
        • See Encoder config.
  • matrix_pins
    • right
      • See Matrix config.
  • soft_serial_pin
    • The GPIO pin to use (serial transport protocol only).
  • soft_serial_speed
    • The protocol speed, from 0 to 5 (serial transport protocol only).
    • Default: 1
  • transport
    • protocol
      • The split transport protocol to use. Must be one of custom, i2c, serial, serial_usart.
    • sync_matrix_state
      • Mirror the main/primary half's matrix state to the secondary half.
      • Default: false
    • sync_modifiers
      • Mirror the modifier state to the secondary half.
      • Default: false
    • watchdog
      • Reboot the secondary half if it loses connection.
      • Default: false
    • watchdog_timeout
      • The amount of time to wait for communication from the primary half in milliseconds.
  • usb_detect
    • enabled
      • Detect USB connection when determining split half roles.
    • polling_interval
      • The polling frequency in milliseconds.
      • Default: 10 (10 ms)
    • timeout
      • The amount of time to wait for a USB connection in milliseconds.
      • Default: 2000 (2 seconds)

Stenography :id=stenography

Configures the Stenography feature.

• stenography
  • enabled
    • Enable the Stenography feature.
    • Default: false
  • protocol
    • The Steno protocol to use. Must be one of all, geminipr, txbolt.
    • Default: "all"

USB :id=usb

• usb
  • device_version (Required)
    • A BCD version number in the format MM.m.r (up to 99.9.9).
    • Example: "1.0.0"
  • pid (Required)
    • The USB product ID as a four-digit hexadecimal number.
    • Example: "0x23B0"
  • vid (Required)
    • The USB vendor ID as a four-digit hexadecimal number.
    • Example: "0xC1ED"
  • force_nkro
    • Force NKRO to be active.
    • Default: false
  • max_power
    • The maximum current draw the host should expect from the device. This does not control the actual current usage.
    • Default: 500 (500 mA)
  • no_startup_check
    • Disable USB suspend check after keyboard startup.
    • Default: false
  • polling_interval
    • The frequency at which the host should poll the keyboard for reports.
    • Default: 1 (1 ms/1000 Hz)
  • shared_endpoint
    • keyboard
      • Send keyboard reports through the "shared" USB endpoint.
      • Default: false
    • mouse
      • Send mouse reports through the "shared" USB endpoint.
      • Default: true
  • suspend_wakeup_delay
    • The amount of time to wait after sending a wakeup packet, in milliseconds.
    • Default: 0 (disabled)
  • wait_for
    • Force the keyboard to wait for USB enumeration before starting up.
    • Default: false

WS2812 :id=ws2812

Configures the WS2812 driver.

• ws2812
  • driver
    • The driver to use. Must be one of bitbang, custom, i2c, pwm, spi, vendor.
    • Default: "bitbang"
  • pin (Required)
    • The GPIO pin connected to DI on the first LED in the chain (bitbang, pwm, spi and vendor drivers only).
  • i2c_address
    • The I²C address of the WS2812 controller (i2c driver only).
    • Default: "0xB0"
  • i2c_timeout
    • The I²C timeout in milliseconds (i2c driver only).
    • Default: 100 (100 ms)