#include <ESP32Servo.h>

Servo myservo; // create servo object to control a servo

int servoPin = 18; // Pin for servo control (digital out)
int potPin = 34; //Pin to control Potentiometer (analog input)
int ADC_Max = 4096; // This is the default ADC max value on the ESP32 (12 bit ADC width); 8 bits = 255, 10 bit= 1024 & 12 bit = 4096 
// Possible PWM GPIO pins o on ESP32: 0(used by on-board button),2,4,5,(used by on-board LED), 12-19, 21-23,25-27,32-33
// Possible ADC pins on ESP32; 0,2,4,12-15,32-39,34-39 are recommended for analog input

int val; // variable to read he value from the analog pin

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32 Potenmeter and Servo w/ Library use!");

  //Allow allocation of all timers
  ESP32PWM::allocateTimer(0);
  ESP32PWM::allocateTimer(1);
  ESP32PWM::allocateTimer(2);
  ESP32PWM::allocateTimer(3);
  myservo.setPeriodHertz(50);  //standars 50Hz servo & Period Pulse of 20ms
  myservo.attach(servoPin, 500, 2500); //attaches the servo on pin 18 to the servo Objecgt
  //using default min/max of 500ms (0 pos) and 2500ms (180 pos), different servos requie different settings
}

void loop() {
  val = analogRead(potPin);
  val = map(val, 0, ADC_Max, 0, 180);
  myservo.write(val);
  Serial.println(val); 
  delay(200); 
}