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Projects General Guidance
4 

#include <ezButton.h>
const int RUN = 4;
const int ResetTest = 3;
const int PassLED = 12;
const int FailLed = 11;
const int RelayDrive = 8;
const int SHORT_PRESS_TIME = 7999; // 1000 milliseconds
const int LONG_PRESS_TIME  = 1201; // 1000 milliseconds
int input = Serial.parseInt();  // keep other operations outside the constrain function
int constrainedInput = constrain(input, 8000, 12000);
ezButton button(2);  // create ezButton object that attach to pin 2;

unsigned long pressedTime  = 0;
unsigned long releasedTime = 0;
bool isPressing = false;
bool isLongDetected = false;
const int PassLed = 12;
const int FailLed = 11;

void setup() {
  Serial.begin(9600);
  button.setDebounceTime(50); // set debounce time to 50 milliseconds
}

void loop() {
  button.loop(); // MUST call the loop() function first

  if (button.isPressed()) {
    pressedTime = millis();
    isPressing = true;
    isLongDetected = false;
  }

  if (button.isReleased()) {
    isPressing = false;
    releasedTime = millis();

    long pressDuration = releasedTime - pressedTime;

    if ( pressDuration < SHORT_PRESS_TIME )
      Serial.println("A short press is detected");
  }

  if (isPressing == true && isLongDetected == false) {
    long pressDuration = millis() - pressedTime;

    if ( pressDuration > LONG_PRESS_TIME ) {
      Serial.println("A long press is detected");
      isLongDetected = true;
    }
    if ( pressDuration = constrainedInput ) {
      Serial.println("Pass");
      isLongDetected = true;
    }
  }
}