#include <ESP32Servo.h>

int redPin = 27;
int delayT = 1000;
int trigPin = 33;
int echoPin = 32;

int servoPin = 18;

Servo myServo;
float duration, distance;

void setup() {
  pinMode(redPin, OUTPUT);
  myServo.attach(servoPin);
  myServo.write(0);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  Serial.begin(115200);
}

void loop() {
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = duration * (0.0344 / 2.0);
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");

  if (distance < 20) {
    myServo.write(0);
  } else if (distance < 50) {
    myServo.write(90);
  } else {
    myServo.write(180);
  }

  if (distance < 50) {
    digitalWrite(redPin, HIGH);
  } else {
    digitalWrite(redPin, LOW);
  }

  delay(delayT);
}