#include <ESP32Servo.h>

Servo myservo;
Servo myservo2;  // create servo object to control a servo

int pos = 0;
int pos2= 180;    // variable to store the servo position
const int stepSize = 10;  // define the step size
const int maxPos = 180;   // maximum servo angle
const int minPos = 0;     // minimum servo angle

void setup() {
  myservo.attach(D7);
  myservo2.attach(D6);   // attaches the servo on pin 9 to the servo object
  myservo.write(pos);
  myservo2.attach(pos2); // set initial position
  Serial.begin(9600);
}

void loop() {
  if (Serial.available() > 0) {  // check if data is available to read
    char command = Serial.read(); // read the incoming byte
    
    if (command == '1') {  // if the command is '1'
      pos += stepSize;
      pos2 -= stepSize;     // increase position by stepSize
      if (pos > maxPos) {  // if the position exceeds maxPos
        pos = maxPos;      // set it to maxPos
      }
      if (pos2 < minPos) {  // if the position exceeds maxPos
        pos2 = minPos;      // set it to maxPos
      }
      myservo.write(pos);  // move the servo to the new position
      myservo2.write(pos2);  // move the servo to the new position
      Serial.println(pos); // print the new position
   
    } else if (command == '0') {  // if the command is '0'
      pos -= stepSize;     // decrease position by stepSize
      if (pos < minPos) {  // if the position falls below minPos
        pos = minPos;      // set it to minPos
      }
       pos2 += stepSize;     // decrease position by stepSize
      if (pos2 > maxPos) {  // if the position falls below minPos
        pos2 = maxPos;      // set it to minPos
      }
      myservo.write(pos);  // move the servo to the new position
      Serial.println(pos); // print the new position
      myservo2.write(pos2);  // move the servo to the new position
    
    }
  }
}