L298N Motor Driver Board

// Canonical example for the L298N Left Motors module
// Drives the two motor channels forward, reverse, and stop using PWM on ENA.

const int ENA = 5;   // PWM speed control
const int IN1 = 8;   // Motor A direction
const int IN2 = 9;   // Motor A direction
const int IN3 = 10;  // Motor B direction
const int IN4 = 11;  // Motor B direction

void stopMotors() {
  digitalWrite(IN1, LOW);
  digitalWrite(IN2, LOW);
  digitalWrite(IN3, LOW);
  digitalWrite(IN4, LOW);
  analogWrite(ENA, 0);
}

void forward(int speedValue) {
  digitalWrite(IN1, HIGH);
  digitalWrite(IN2, LOW);
  digitalWrite(IN3, HIGH);
  digitalWrite(IN4, LOW);
  analogWrite(ENA, speedValue);
}

void reverse(int speedValue) {
  digitalWrite(IN1, LOW);
  digitalWrite(IN2, HIGH);
  digitalWrite(IN3, LOW);
  digitalWrite(IN4, HIGH);
  analogWrite(ENA, speedValue);
}

void setup() {
  pinMode(ENA, OUTPUT);
  pinMode(IN1, OUTPUT);
  pinMode(IN2, OUTPUT);
  pinMode(IN3, OUTPUT);
  pinMode(IN4, OUTPUT);

  Serial.begin(9600);
  Serial.println("L298N left motors example starting...");
  stopMotors();
}

void loop() {
  Serial.println("Forward");
  forward(180);
  delay(2000);

  Serial.println("Stop");
  stopMotors();
  delay(1000);

  Serial.println("Reverse");
  reverse(180);
  delay(2000);

  Serial.println("Stop");
  stopMotors();
  delay(1000);
}