#include <ESP32Servo.h>
#include "DHT.h"

#define DHTPIN 4      
#define DHTTYPE DHT22

Servo myServo;

int servoPin = 18;      
int ledPin = 2;         

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  Serial.println(F("Group 1 - DHT22"));

  ESP32PWM::allocateTimer(0);

  // Initialize pins
  pinMode(ledPin, OUTPUT);

  // Attach servo
  myServo.setPeriodHertz(50);       
  myServo.attach(servoPin, 500, 2400); 

  // Start DHT sensor
  dht.begin();
}

void loop() {

  float t = dht.readTemperature();

  if (isnan(t)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  Serial.print("The temperature is : ");
  Serial.println(t);

  if (t <= 25)
  {
    myServo.write(0);         
    digitalWrite(ledPin, HIGH); 
  }else if (t > 25 && t <= 30)
  {
    myServo.write(90);         
    digitalWrite(ledPin, HIGH);
    delay(1000);
    digitalWrite(ledPin, LOW);
    delay(1000);
  } else
  {
    myServo.write(180);         
    digitalWrite(ledPin, HIGH);
    delay(100);
    digitalWrite(ledPin, LOW);
    delay(100);
  }
}