*Multiple buttons conencted to one analog pin using resistor voltage divider
*Multiple buttons connected to MCP23S08 SPI port expander
*Multiple capacitive buttons conencted to one feed pin and multiple receive pins (TODO)
*Multiplex matrix buttons (TODO)
*Multiple buttons connected to multiple diginal pins with internal or external pullups (TODO)

*onKeyDown
*onKeyUp
*onKeyPress (with autorepeat)
*onHold (TODO)

AnalogButtons buttons(6, 836, 544, 368, 228, 80);


/***** EVENT HANDLERS ******/  

void onKeyPress(uint8_t btn) {
	//you pressed the button number btn
}

/***** SETUP ******/  

void setup() {
	buttons.onKeyPress = onKeyPress;
}

/***** LOOP ******/  

void loop() {
	buttons.update();
}