#include <AccelStepper.h>

#define DIR_PIN  2  
#define STEP_PIN 4  
#define EN_PIN   5  
#define POT_PIN 34  

AccelStepper stepper(AccelStepper::DRIVER, STEP_PIN, DIR_PIN); 

void setup() {
  Serial.begin(115200);

  stepper.setMaxSpeed(1000);   
  stepper.setAcceleration(50); 

  pinMode(POT_PIN, INPUT);
  pinMode(EN_PIN, OUTPUT); 
  digitalWrite(EN_PIN, LOW);  
}

void loop() {
  
  int potValue = analogRead(POT_PIN); 
  long speed = map(potValue, 0, 4095, 0, 1000);  

  stepper.setSpeed(speed);  
  stepper.runSpeed();  

  Serial.print("Potenciômetro: ");
  Serial.print(potValue);
  Serial.print("  Velocidade: ");
  Serial.println(speed);

  delay(20);  
}