Any idea on how to emulate digitalRead in https://github.com/ChrisMicro/ArduinoOnPc/blob/master/src/cores/arduino/wiring_digital.cpp#L35 ? - Keyboard cannot be used since can interfering with serial link. - Like kernel polling files and doing some `echo "1" > gpio_3` - Other idea ? See also https://github.com/marcmerlin/ArduinoOnPc-FastLED-GFX-LEDMatrix/issues/8