# Launchpad MK2 not detected by custom driver

**URL:** <https://discourse.zynthian.org/t/launchpad-mk2-not-detected-by-custom-driver/13329>\
**Category:** Software\
**Tags:** issue, midi-controllers, midi, oram\
**Created:** [June 28, 2026, 11:51am UTC](https://discourse.zynthian.org/t/launchpad-mk2-not-detected-by-custom-driver/13329 "2026-06-28T11:51:25Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Kazz](https://discourse.zynthian.org/letter_avatar_proxy/v4/letter/k/d2c977/32.png) [@Kazz](https://discourse.zynthian.org/u/Kazz)\
**Post date:** [June 28, 2026, 11:51am UTC](https://discourse.zynthian.org/t/launchpad-mk2-not-detected-by-custom-driver/13329/1 "2026-06-28T11:51:25Z")

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Hi,

I bought an Novation Launchpad MK2 which I want a driver for. I have modified the pro mk2 driver, but the **midi controller wont seem to be assigned to the driver** , it just works as a normal midi keyboard. Can a thoughtfull person be able to help me make the next steps? 😁

The changes:

- Changed Class and file name to mk2 instead of pro mk2
- Changed dev\_id:s. Right now: `dev_ids = [“Launchpad MK2”, “Launchpad MK2 MIDI 1”]`. Also tested both alone.
- Changed the init function to what should be the correct message according to programmers reference. `def init(self):`  
`self.send_sysex(“22 00”)`
- Changed the string to what should be correct number. `“F0 00 20 29 02 18 {} F7”. (18 instead of 10).`

Using raspberry pi 4b. I can’t tell what version of zynthian I’m using, but I downloaded he last stable version at the beginning of june 2026.

## Code (The beginning which i’ve changed)

```auto
class zynthian_ctrldev_launchpad_mk2(zynthian_ctrldev_zynpad):

    dev_ids = ["Launchpad MK2", "Launchpad MK2 MIDI 1"]

    PAD_COLOURS = [6, 29, 17, 49, 66, 41, 23,
                   13, 96, 2, 81, 82, 83, 84, 85, 86, 87]
    STARTING_COLOUR = 21
    STOPPING_COLOUR = 5

    def send_sysex(self, data):
        if self.idev_out is not None:
            msg = bytes.fromhex("F0 00 20 29 02 18 {} F7".format(data)) # K/ Changed '10' to '18'
            lib_zyncore.dev_send_midi_event(self.idev_out, msg, len(msg))
            sleep(0.05)

    def get_note_xy(self, note):
        row = 8 - (note // 10)
        col = (note % 10) - 1
        return col, row

    def init(self):
        self.send_sysex("22 00")
        logging.warning("MK2 init() called")

    def end(self):
        # Select Notes/Drum layout, page 0 (Chord = 0x2, Note/Drum = 0x4, Scale Settings = 0x5, ...)
        self.send_sysex("22 02")

```

## Logs

are too big. Relevant logs might be:

- `Jun 28 12:16:55 zynthian startx[1271]: DEBUG:zynthian_ctrldev_manager.update_available_drivers: Loaded ctrldev driver class 'zynthian_ctrldev_launchpad_mk2'`
- `Jun 28 12:16:55 zynthian startx[1271]: INFO:zynthian_ctrldev_manager.update_available_drivers: Found ctrldev driver 'zynthian_ctrldev_launchpad_mk2' for devices with ID 'Launchpad MK2'`  
`Jun 28 12:16:55 zynthian startx[1271]: INFO:zynthian_ctrldev_manager.update_available_drivers: Found ctrldev driver 'zynthian_ctrldev_launchpad_mk2' for devices with ID 'Launchpad MK2 MIDI 1'`

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<div class="post-metadata">

**Author:** ![LFO](https://discourse.zynthian.org/letter_avatar_proxy/v4/letter/l/3ab097/32.png) [@LFO](https://discourse.zynthian.org/u/LFO)\
**Post date:** [July 6, 2026, 7:50am UTC](https://discourse.zynthian.org/t/launchpad-mk2-not-detected-by-custom-driver/13329/2 "2026-07-06T07:50:40Z")

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Hi Kazz,

Feel free to try this driver below. I used the apckey25 driver as the template and brought in some of the functionality.

Since then I have made an updated one with volume and pan functionality (though it uses the pro’s extra buttons so you’d have to dive in and changes a couple of things). I never got the note input mode working properly though, couldn’t figure it out. If you want to try that, let me know.

> [@NEW: Control-device manager + controller device "drivers"](https://discourse.zynthian.org/t/new-control-device-manager-controller-device-drivers/8593/267):
>
> I’ve been working on an updated launchpad pro mk2 driver for Vangelis. It’s basically useable, it has launcher, note, device control (replicates V5 button layout) and fader control using the top right mode buttons. Only volume is working in fader mode for now (no LEDs in this mode though frowning) and I haven’t figured how to get pan & send working yet. Note, if you use other launchpad versions (e.g. launchpad mini mk3, launchpadX, maybe even mk3 pro) you may find this driver can also work if…

A unified driver for all the launchpads could be cool so they can share functionality but it needs someone with the skills to make it work.

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<div class="post-metadata">

**Author:** ![Kazz](https://discourse.zynthian.org/letter_avatar_proxy/v4/letter/k/d2c977/32.png) [@Kazz](https://discourse.zynthian.org/u/Kazz)\
**Post date:** [July 12, 2026, 9:02pm UTC](https://discourse.zynthian.org/t/launchpad-mk2-not-detected-by-custom-driver/13329/3 "2026-07-12T21:02:49Z")

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Thanks! Will check it out 🙂