/*
* Created by ArduinoGetStarted.com
*
* This example code is in the public domain
*
* Tutorial page: https://arduinogetstarted.com/tutorials/arduino-button-led
*/
// constants won't change. They're used here to set pin numbers:
const int BUTTON_PIN = 8; // the number of the pushbutton pin
const int LED_PIN = 3; // the number of the LED pin
// variables will change:
int buttonState = 0; // variable for reading the pushbutton status
void setup() {
// initialize the LED pin as an output:
pinMode(LED_PIN, OUTPUT);
// initialize the pushbutton pin as an pull-up input:
// the pull-up input pin will be HIGH when the switch is open and LOW when the switch is closed.
pinMode(BUTTON_PIN, INPUT_PULLUP);
}
void loop() {
// read the state of the pushbutton value:
buttonState = digitalRead(BUTTON_PIN);
delay(300);
// control LED according to the state of button
if(buttonState == LOW) { // If button is pressing
digitalWrite(LED_PIN, HIGH); // turn on LED
}
else // otherwise, button is not pressing
digitalWrite(LED_PIN, LOW); // turn off LED
}