This library is a Arduino-friendly version of TinyUSB stack. It is designed with structure and APIs that are easily integrated to an Arduino Core. There are 2 type of supported cores: with and without ...
The PCB must be mounted floated, otherwise key presses don't work reliable. Connect pins 3 and 4 on connector P1 for 16-pin button mode. Smaller keypads with less pins may work, but are not tested.
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