Control 28BYJ-48 Stepper Motor Using TTGO T-Display ESP32

ESP32Stepper28BYJ48.ino

/*
  Tutorial: Control 28BYJ-48 Stepper Motor Using TTGO T-Display ESP32
  
  Board:
  - TTGO T-Display ESP32
    https://my.cytron.io/p-ttgo-t-display-esp32-1.14-display-module
  
  Output:
  - 12V 28BYJ-48 Stepper Motor
    https://my.cytron.io/c-motor-and-motor-driver/c-dc-motor/c-stepper-motor/p-12v-28byj-48-stepper-motor-plus-uln2003-driver-board
  Connection  TTGO | Stepper Driver
               GND | GND
                27 | IN1
                26 | IN2
                25 | IN3
                33 | IN4
  
  Ext libraries:
  - TFT_eSPI by Bodmer Version 1.4.16
*/

#include <SPI.h>
#include <TFT_eSPI.h>
TFT_eSPI tft = TFT_eSPI(); // Resolution 135 x 240
#define FF17 &FreeSans9pt7b
#define FF21 &FreeSansBold9pt7b
#define ROW1 0,16
#define ROW2 0,38
#define ROW3 0,60
#define ROW4 0,82
#define ROW5 0,104
#define ROW6 0,126

#define BUTTON1 35
#define BUTTON2 0

#define STEPPER_IN1 27
#define STEPPER_IN2 26
#define STEPPER_IN3 25
#define STEPPER_IN4 33

#define REVOLUTION_STEP 2048 // 1 revolution

boolean stepperDirection = false;
int stepperStep = 0;
int stepperStepCount = 0;
boolean stepperMove = false;
long prevMillisStepper = 0;
int intervalStepper = 2; // Minimum is 2, increase for lower speed

boolean button1Pressed = false;
boolean button2Pressed = false;

void setup()
{
  pinMode(BUTTON1, INPUT_PULLUP);
  pinMode(BUTTON2, INPUT_PULLUP);
  
  pinMode(STEPPER_IN1, OUTPUT);
  pinMode(STEPPER_IN2, OUTPUT);
  pinMode(STEPPER_IN3, OUTPUT);
  pinMode(STEPPER_IN4, OUTPUT);

  tft.init();
  tft.setRotation(1);
  tft.fillScreen(TFT_BLACK);
  
  tft.setFreeFont(FF21);
  tft.setTextColor(TFT_BLUE);
  tft.setCursor(ROW1);
  tft.print("BUTTON1");
  tft.setCursor(ROW5);
  tft.print("BUTTON2");
  
  tft.setFreeFont(FF17);
  tft.setTextColor(TFT_RED);
  tft.setCursor(ROW2);
  tft.print("Clockwise");
  tft.setCursor(ROW6);
  tft.print("Counter Clockwise");
}

void loop()
{
  if (digitalRead(BUTTON1) == LOW &&
      button1Pressed == false) {
    button1Pressed = true;
    
    stepperDirection = false;
    stepperMove = true;
    stepperStepCount = 0;
    stepperStep = 1;
  }
  else if (digitalRead(BUTTON1) == HIGH &&
           button1Pressed == true) {
    button1Pressed = false;
  }
  
  if (digitalRead(BUTTON2) == LOW) {
    
    stepperDirection = true;
    stepperMove = true;
    stepperStepCount = 0;
    stepperStep = 1;
  }
  else if (digitalRead(BUTTON2) == HIGH &&
           button2Pressed == true) {
    button2Pressed = false;
  }
  
  if (millis() - prevMillisStepper > intervalStepper) {
    
    if (stepperMove == true) {
      if (stepperDirection) {
        if (stepperStep++ >= 3) {
          stepperStep = 0;
        }
      }
      else {
        if (stepperStep-- == 0) {
          stepperStep = 3;
        }
      }

      if (stepperStepCount++ == REVOLUTION_STEP) {
        stepperMove = false;
        stepperStep = 4;
      }

      switch (stepperStep) {
        case 0:
          digitalWrite(STEPPER_IN1, HIGH);
          digitalWrite(STEPPER_IN2, LOW);
          digitalWrite(STEPPER_IN3, LOW);
          digitalWrite(STEPPER_IN4, LOW);
          break;

        case 1:
          digitalWrite(STEPPER_IN1, LOW);
          digitalWrite(STEPPER_IN2, HIGH);
          digitalWrite(STEPPER_IN3, LOW);
          digitalWrite(STEPPER_IN4, LOW);
          break;

        case 2:
          digitalWrite(STEPPER_IN1, LOW);
          digitalWrite(STEPPER_IN2, LOW);
          digitalWrite(STEPPER_IN3, HIGH);
          digitalWrite(STEPPER_IN4, LOW);
          break;

        case 3:
          digitalWrite(STEPPER_IN1, LOW);
          digitalWrite(STEPPER_IN2, LOW);
          digitalWrite(STEPPER_IN3, LOW);
          digitalWrite(STEPPER_IN4, HIGH);
          break;

        default:
          digitalWrite(STEPPER_IN1, LOW);
          digitalWrite(STEPPER_IN2, LOW);
          digitalWrite(STEPPER_IN3, LOW);
          digitalWrite(STEPPER_IN4, LOW);
          break;
      }
    }

    prevMillisStepper = millis();
  }
}

This code is for inbuilt button in ESP32 if I change pin no. in
#define BUTTON1 35
#define BUTTON2 0
to
#define BUTTON1 34
#define BUTTON2 35
it is not working. How could I resolve it, And how could I add more rotations in it ?