Pull-down button

This sketch demonstrates the basic implementation of a button or switch, in pull-down configuration, with debouncing functionality for noisy buttons.

The code

#include <CtrlBtn.h>

// Define an onPress handler.
void onPress() {
  Serial.println("Pull-down button pressed");
}

// Define an onRelease handler.
void onRelease() {
  Serial.println("Pull-down button released");
}

/*
  Create a button with:
  - signal pin.
  - bounce duration.
  - onPress handler.
  - onRelease handler.
 */
CtrlBtn button(1, 15, onPress, onRelease);

void setup() {
  Serial.begin(9600);
  // For this example we use a board with internal pull-down resistors:
  button.setPinMode(INPUT_PULLDOWN);
  // If your board does not support that, you can use an external 
  // pull-down resistor. In that case you call the following method:
  // button.setPinMode(INPUT, PULL_DOWN);
}

void loop() {
  // Handle all button functionality.
  button.process();
}