#include <ServoESP32.h>
#define TRIGGER_PIN 0 // Replace with your actual trigger pin number
#define ECHO_PIN 21    // Replace with your actual echo pin number
#define LED_PIN 27     // Replace with your LED pin number
#define SERVO_PIN 4    // Replace with your servo pin number

ServoESP32 myservo;
long duration, distance;

void setup() {
  pinMode(TRIGGER_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(LED_PIN, OUTPUT);
  pinMode(SERVO_PIN, OUTPUT);
  
  myservo.attach(SERVO_PIN);
  myservo.write(90); // Initialize servo to the middle position
}

void loop() {
  // Ultrasonic sensor
  digitalWrite(TRIGGER_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIGGER_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIGGER_PIN, LOW);
  duration = pulseIn(ECHO_PIN, HIGH);
  distance = duration * 0.034 / 2; // Calculate distance in centimeters

  // LED control
  if (distance < 10) {
    digitalWrite(LED_PIN, HIGH); // Turn on LED when an object is close
  } else {
    digitalWrite(LED_PIN, LOW);  // Turn off LED when no object is close
  }

  // Servo motor control
  int servoAngle = map(distance, 2, 200, 0, 180); // Map distance to servo angle
  myservo.write(servoAngle);

  delay(100); // Adjust this delay based on your project requirements
}