Control Servo Motor using ESP32 and Serial Input.

ESP32-Servo-Serial.ino

const int servoPin = 16;  /* GPIO16 */

int dutyCycle = 0;

/* Setting PWM properties */
const int PWMFreq = 50;
const int PWMChannel = 0;
const int PWMResolution = 8;
//const int MAX_DUTY_CYCLE = (int)(pow(2, PWMResolution) - 1);

void setup()
{  
  Serial.begin(115200);
  ledcSetup(PWMChannel, PWMFreq, PWMResolution);
  /* Attach the LED PWM Channel to the GPIO Pin */
  ledcAttachPin(servoPin, PWMChannel);
  ledcWrite(PWMChannel, dutyCycle);
}
void loop()
{
  while(Serial.available())
  {
    String in_char = Serial.readStringUntil('\n');
    dutyCycle = in_char.toInt();
    Serial.println(dutyCycle);
    ledcWrite(PWMChannel, dutyCycle);
    delay(10);
  }
}