The easiest way to learn the keyboard library is to read some simple sketches. keybrd_2_single-layer_annotated.ino is a simple sketch with annotations that explain how a keybrd sketch works. The sketch will run on the basic breadboard keyboard described in tutorial_1_breadboard_keyboard.md
Class definitions can be viewed in the keybrd library. After reading the sketch you will be able to modify it to suite your own single-layer keyboard design.
1) Add a third column to the breadboard keyboard and sketch.
keybrd tutorial by Wolfram Volpi is licensed under a Creative Commons Attribution 4.0 International License.
Permissions beyond the scope of this license may be available at https://github.com/wolfv6/keybrd/issues/new.