Super experimental Le Capybara keyboard support for ZMK.
After first loading the firmware, you need to run the calibration. Use a terminal, e.g. putty, tio, etc to connect to the virtual console device, e.g. /dev/ttyACM0:
You'll be presented with a prompt like uart :~$. At the prompt, type ec matrix calibration start and hit enter. As prompted, leave all the keys alone while the low baselines are set, and then when prompted press each key slowly in sequence.
After the calibration completes, type ec matrix calibration save to persist the calibration to flash. You can re-run this process later if needed if you've made changes and need to recalibrate things.
Once calibrated, the saved calibrations should be loaded the next time you plug in or reset the keyboard.