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KnobXP lets you use the Knobster within X-Plane 11 and 12, both in normal mode and VR mode.

Info KnobXP is only compatible with the Knobster V2 in X-Plane 11 and 12. This means that it is not compatible with the old and the DIY Knobster.



    The KnobXP menu within X-Plane
    KnobXP settings window

    1. When running KnobXP on Linux, please read the readme.txt file for installing required libraries
    2. Unzip the KnobXP folder into \X-Plane 11\Resources\plugins\
    3. Start X-Plane and once the aircraft is loaded you will see the KnobXP window with the default modes loaded.
    4. When in VR mode, you can position the KnobXP window to a convenient place in your cockpit with your VR controller.

    User manual

    Control modes

    KnobXP comes with a list of pre-defined modes. These modes can be turned on and off from the KnobXP settings window.
    In X-Plane go to Plugins -> KnobXP -> Settings and a settings window will turn up, which allows you to turn modes on and off. These settings are stored uniquely for each different aircraft you fly.

    Each mode triggers different X-Plane commands. Two examples:

    Autopilot heading
    Outer dial: Autopilot heading up / down
    Inner dial: Autopilot heading up / down
    Button: Sync autopilot heading
    COM1 frequency 8.33KHz
    Outer dial: COM1 frequency coarse up / down
    Inner dial: COM1 frequency fine up / down
    Button: COM1 standby flip

    Active mode

    The active mode is visible within the blue box.

    Selecting a mode

    Selecting a mode can either be done by pointing and clicking with your mouse or VR controller, or by pressing and holding the Knobster button for half a second. When pressing and holding the Knobster button for half a second, KnobXP will go into selection mode, indicated by a green box. When in selection mode, both the inner and outer dial can be used to scroll through the list. Pressing the Knobster button again will select the mode in the green box.

    Alternatively you can assign a next and previous command to a joystick button. These commands can be found in the X-Plane joystick settings when searching for Knobster.

    Command:                       Description:
    si/knobster/mode/next          Select next Knobster mode
    si/knobster/mode/prev          Select previous Knobster mode

    Advanced usage

    You can create your own mode with a little JSON script. This allows for commands for custom add-on aircraft for example.

    Navigate to X-Plane 11\Resources\plugins\KnobXP\modes\ There you will see all the available modes within a JSON file. These JSON files can be opened with a code editor like Notepad++.
    The best tool to find X-Plane commands is called 'datareftool', made by Lee Baker. It is available for download from his Github.

        "name": "COM1 frequency 8.33KHz",
        "minor_cw_cmd": "sim/radios/stby_com1_fine_up_833",
        "minor_ccw_cmd": "sim/radios/stby_com1_fine_down_833",
        "major_cw_cmd": "sim/radios/stby_com1_coarse_up_833",
        "major_ccw_cmd": "sim/radios/stby_com1_coarse_down_833",
        "button_released_cmd": "sim/radios/com1_standy_flip",
        "order": 301500

    Optionally the command appointed to the Knobster button can be forced for a defined number of seconds. This can be useful for a starter engine command for example. In the example below, the starter command is forced for 2 seconds.

        "name": "LR C172 Ignition key",
        "minor_cw_cmd": "laminar/c172/ignition_up",
        "minor_ccw_cmd": "laminar/c172/ignition_down",
        "major_cw_cmd": "laminar/c172/ignition_up",
        "major_ccw_cmd": "laminar/c172/ignition_down",
        "button_released_cmd": "sim/starters/engage_starter_1",
        "button_released_cmd_force_sec": 2,
        "order": 608120

    Create a new JSON file based on the same structure to create your own mode, and fill in your desired X-Plane commands.

    name                           The mode name that will show up within X-Plane
    minor_cw_cmd                   Inner dial clockwise command
    minor_ccw_cmd                  Inner dial counter clockwise command
    major_cw_cmd                   Outer dial clockwise command
    major_ccw_cmd                  Outer dial counter clockwise command
    order                          This number determines in which position the mode will show up in the list, the lower the number the higher in the list
    button_released_cmd            Button command
    button_released_cmd_force_sec  Number of seconds the button command is forced (optional)
    minor_acceleration             Inner dial acceleration, 1 is no acceleration (optional)
    major_acceleration             Outer dial acceleration, 1 is no acceleration (optional)