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)
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'