#include <ESP32Servo.h>
Servo myservo;
int pos;
int potpin = 34;

void setup(){
  myservo.attach(21);
  Serial.begin(115200);
}
void loop(){
  Serial.print("pos: ");
  Serial.println(pos);
  pos = analogRead(potpin);
  map(potpin, 0, 1023, 0, 180);
  myservo.write(pos);
    delay(1000);
}