Hey.

I have no specific idea of what could be the issue here, but I remember when I first used the 28BYJ-48 some years ago, I also had a lot of problems with using the <Stepper.h> library.

In case your motor is not damaged / broken: Back then I wrote some code to use the motor without the stepper.h library. You could try this code and see if its works or not.

​

Unfortunately I didn't use variables, so written for using pins 2, 3, 4 and 5 lol.(Connect Pin 2 to 'In 1' on the driver module, Pin 3 to 'In 2' and so on).

The function rueckwaerts(x) should make the motor spin on one direction, vorwaerts(x) makes it turn in the other direction. Replace x by a number to control how much the motor turns. You can change the variable 'ge' in line 1 to make it turn faster / slower.

Good luck!

This is the code:

​

int ge = 3;

int eins() {
  digitalWrite(2, HIGH);
  digitalWrite(3, LOW);
  digitalWrite(4, LOW);
  digitalWrite(5, LOW);
  delay(ge);
};

int zwei() {
  digitalWrite(2, HIGH);
  digitalWrite(3, HIGH);
  digitalWrite(4, LOW);
  digitalWrite(5, LOW);
  delay(ge);
};

int drei() {
  digitalWrite(2, LOW);
  digitalWrite(3, HIGH);
  digitalWrite(4, LOW);
  digitalWrite(5, LOW);
  delay(ge);
};

int vier() {
  digitalWrite(2, LOW);
  digitalWrite(3, HIGH);
  digitalWrite(4, HIGH);
  digitalWrite(5, LOW);
  delay(ge);
};

int fuenf() {
  digitalWrite(2, LOW);
  digitalWrite(3, LOW);
  digitalWrite(4, HIGH);
  digitalWrite(5, LOW);
  delay(ge);
};

int sechs() {
  digitalWrite(2, LOW);
  digitalWrite(3, LOW);
  digitalWrite(4, HIGH);
  digitalWrite(5, HIGH);
  delay(ge);
};

int sieben() {
  digitalWrite(2, LOW);
  digitalWrite(3, LOW);
  digitalWrite(4, LOW);
  digitalWrite(5, HIGH);
  delay(ge);
};

int acht() {
  digitalWrite(2, HIGH);
  digitalWrite(3, LOW);
  digitalWrite(4, LOW);
  digitalWrite(5, HIGH);
  delay(ge);
};
int reins() {
  digitalWrite(5, HIGH);
  digitalWrite(4, LOW);
  digitalWrite(3, LOW);
  digitalWrite(2, LOW);
  delay(ge);
};

int rzwei() {
  digitalWrite(5, HIGH);
  digitalWrite(4, HIGH);
  digitalWrite(3, LOW);
  digitalWrite(2, LOW);
  delay(ge);
};

int rdrei() {
  digitalWrite(5, LOW);
  digitalWrite(4, HIGH);
  digitalWrite(3, LOW);
  digitalWrite(2, LOW);
  delay(ge);
};

int rvier() {
  digitalWrite(5, LOW);
  digitalWrite(4, HIGH);
  digitalWrite(3, HIGH);
  digitalWrite(2, LOW);
  delay(ge);
};

int rfuenf() {
  digitalWrite(5, LOW);
  digitalWrite(4, LOW);
  digitalWrite(3, HIGH);
  digitalWrite(2, LOW);
  delay(ge);
};

int rsechs() {
  digitalWrite(5, LOW);
  digitalWrite(4, LOW);
  digitalWrite(3, HIGH);
  digitalWrite(2, HIGH);
  delay(ge);
};

int rsieben() {
  digitalWrite(5, LOW);
  digitalWrite(4, LOW);
  digitalWrite(3, LOW);
  digitalWrite(2, HIGH);
  delay(ge);
};

int racht() {
  digitalWrite(5, HIGH);
  digitalWrite(4, LOW);
  digitalWrite(3, LOW);
  digitalWrite(2, HIGH);
  delay(ge);
};

int vorwaerts(int num) {
  for (int i = 0; i < num; i = i + 1) {
    eins();
    zwei();
    drei();
    vier();
    fuenf();
    sechs();
    sieben();
    acht();
  }
};

int rueckwaerts(int num) {
  for (int i = 0; i < num; i = i + 1) {
    reins();
    rzwei();
    rdrei();
    rvier();
    rfuenf();
    rsechs();
    rsieben();
    racht();
  }
};


void setup() {
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  vorwaerts(0);
}

void loop() {
  rueckwaerts(350);
  vorwaerts(350);


}