#define MOTOR_SPEED 27
#define MOTOR_FWRD 26
#define MOTOR_BACK 25
#define MAX_SPEED 0xffff
#include "esp32-hal-ledc.h"

void setup() {
  // put your setup code here, to run once:
  pinMode(MOTOR_FWRD,OUTPUT);
  pinMode(MOTOR_BACK,OUTPUT);

  digitalWrite(MOTOR_BACK,LOW);
  digitalWrite(MOTOR_FWRD,HIGH);

  //for motor ...
  ledcSetup(1, 5000, 8);    // channel 1, 50 Hz, 16-bit width
  ledcAttachPin(MOTOR_SPEED, 1);   // GPIO 22 assigned to channel 1
  analogWrite(MOTOR_SPEED, 0);

  Serial.begin(115200);
  Serial.println("Enter values between 0 - 255");
}

void loop() {

  if(Serial.available())
    { 
      uint8_t speed = Serial.parseInt();
      Serial.println(speed);
      analogWrite(MOTOR_SPEED, speed );
    }
}

void analogWrite(uint8_t pin, uint8_t speed){
    ledcWrite(1, speed); 
}