#include <ESP32Servo.h>
                    // starting point (home position)
                    // value of potentiometers and servos are 0 at this point
                    //choose any potentiometer to be used
Servo jaypeeServo; // servo 1 to be controlled by and connected to potentiometer 1
Servo jedServo; // servo 2 to be controlled by and connected to potentiometer 2
Servo ourServo; // servo 3 to be controlled by and connected to potentiometer 3
                    // all potentiometers and servos will start at home position/initial position
                    // potentiometers and servo will start at a value of 0

int jaypeePin = 18; //"servo1" initial position/home position
int jedPin = 19; // "servo2" initial position/home position
int ourPin = 21;  // "servo3 initial position/home position

int potPin1 = 34;  // initial position (manually rotated from left to right)
                    //  potentiometer 1 connected to servo 1

int potPin2 = 35; // initial position (manually rotated from left to right)
                    //  potentiometer 2 connected to servo 2

int potPin3 = 32;    // initial position (manually rotated from left to right)
                    //  potentiometer 3 connected to servo 3

int ADC = 4096;     // analog to digital converter
                    // measure varying voltage from 0 to 3.3v (connected to 3.3v pin in ESP32)
                    // voltage measured is assigned to 0v to 0
                    // voltage measured is assigned to 3.3v to 4096
int val; // variable to read the value from the analog pin
 
void setup()
{
  jaypeeServo.attach(jaypeePin); // attaches the servo on pin 18
  jedServo.attach(jedPin); // attaches the servo on pin 19
  ourServo.attach(ourPin);  // attaches the servo on pin 21
}
 
void loop()
{
 
    if (val = analogRead(potPin1)) // read the value of the potentiometer(value between 0 and 1023)

  {val = map(val, 0, ADC, 0, 180);    // scale it to operate with the servo(value between 0 and 180)
  jaypeeServo.write(val);                
  delay(10);                      
  }
  else
      val = map(val, 0, ADC, 0, 0);     // scale it to operate with the servo(value 0)
     jaypeeServo.write(val);                  
     delay(10);        

  if (val = analogRead(potPin2))      // read the value of the potentiometer(value between 0 and 1023)

  {val = map(val, 0, ADC, 0, 180);   // scale it to operate with the servo(value between 0 and 180)
  jedServo.write(val);                  
  delay(10);                          
  }
  else
   val = map(val, 0, ADC, 0, 0);  // scale it to operate with the servo(value 0)  
    jedServo.write(val);                  
    delay(10);

  if (val = analogRead(potPin3))      // read the value of the potentiometer(value between 0 and 1023)        
 
  {val = map(val, 0, ADC, 0, 180);   // scale it to operate with the servo(value between 0 and 180)  
  ourServo.write(val);                  
  delay(10);  
  }
  else
    val = map(val, 0, ADC, 0, 0);   // scale it to operate with the servo(value 0)
    ourServo.write(val);                  
    delay(10);
}