/* Push Button as Momentary Switch
 ---------------------------------
 Without delay function.
 Easy to understand.
 More efficient.

 By Capt.Ali.H.K
 4/12/2023
 [email protected]
 */

#define BUTTON_PRESSED (!digitalRead(pushButton))

const uint8_t pushButton = 3;

void setup(){
  pinMode(pushButton, INPUT_PULLUP);

  Serial.begin(115200);
}

void loop(){
static bool currentPress;
static bool previousPress;

static bool buttonState;

static unsigned long debounceInterval;

  if(millis() - debounceInterval > 15){
    if(BUTTON_PRESSED){
      currentPress = true;

      debounceInterval = millis();
    }
    else  
      currentPress = false;
  }
  if(currentPress == LOW && previousPress){
    buttonState = true;
    Serial.println("Button Pressed");

    previousPress = currentPress;
  }
  else if(currentPress && previousPress == LOW) {
    buttonState = false;

    previousPress = currentPress;
  }
}