change.ino

This example toggles the debug LED (pin 13) on or off when a button on pin 2 is pressed.

// This example toggles the debug LED (pin 13) on or off
// when a button on pin 2 is pressed.
// Include the Bounce2 library found here :
// https://github.com/thomasfredericks/Bounce2
#include <Bounce2.h>
#define BUTTON_PIN 2
#define LED_PIN 13
int ledState = LOW;
Bounce debouncer = Bounce(); // Instantiate a Bounce object
void setup() {
debouncer.attach(BUTTON_PIN,INPUT_PULLUP); // Attach the debouncer to a pin with INPUT_PULLUP mode
debouncer.interval(25); // Use a debounce interval of 25 milliseconds
pinMode(LED_PIN,OUTPUT); // Setup the LED
digitalWrite(LED_PIN,ledState);
}
void loop() {
debouncer.update(); // Update the Bounce instance
if ( debouncer.fell() ) { // Call code if button transitions from HIGH to LOW
ledState = !ledState; // Toggle LED state
digitalWrite(LED_PIN,ledState); // Apply new LED state
}
}