ESP32 : control DC motor speed

// Motor A

int motor1Pin1 = 27; 

int motor1Pin2 = 26; 

int enable1Pin = 14; 

int speedMotor = 0;

int VOL = 34;

int data = 0;

// Setting PWM properties

const int freq = 30000;

const int pwmChannel = 0;

const int resolution = 8;

// int dutyCycle = 200;

void setup() {

  // sets the pins as outputs:

  pinMode(motor1Pin1, OUTPUT);

  pinMode(motor1Pin2, OUTPUT);

  pinMode(enable1Pin, OUTPUT);

  // configure LED PWM functionalitites

  ledcSetup(pwmChannel, freq, resolution);

  // attach the channel to the GPIO to be controlled

  ledcAttachPin(enable1Pin, pwmChannel);

  Serial.begin(115200);

  // testing

  Serial.print("Testing DC Motor...");

  delay(2000);

}

void loop() {

  data = analogRead(VOL);

  if (data < 2048){

    int speedMotor = map(data, 0,2048,255,0);

    Serial.print("speedMotor=");

    Serial.println(speedMotor);

    digitalWrite(motor1Pin1, LOW);

    digitalWrite(motor1Pin2, HIGH);

    ledcWrite(pwmChannel, speedMotor);

  }else{

    int speedMotor = map(data-2048, 0,2048,0,255);

    Serial.print("speedMotor=");

    Serial.println(speedMotor);

    digitalWrite(motor1Pin1, HIGH);

    digitalWrite(motor1Pin2, LOW);

    ledcWrite(pwmChannel, speedMotor);

  }

  delay(200);

}