Super basic readme.

README.md

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+# Le Capybara ZMK Config Repo:
+
+Super experimental [Le Capybara](https://github.com/sporkus/le_capybara_keyboard/) keyboard support for ZMK.
+
+## Calibration
+
+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 load` and hit enter. As prompted, follow the sequence to press and release each key from top left to bottom right.
+
+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.