#include <DHT.h>
#include <WiFi.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd (0x27,16,2);
#define DHT_SENSOR_PIN  21
#define DHT_SENSOR_TYPE 22

DHT dht_sensor(DHT_SENSOR_PIN21, DHT_SENSOR_TYPE22);

void setup() {
  lcd.int();
  lcd.clear();
  lcd.backlight();
  lcd.setCursor (2,0);
  lcd.println ("LCD I2C Command");
  lcd.setCursor (4,0);

  Serial.begin(9600);
  dht_sensor.begin();
    
  pinMode(DHTPin, INPUT);
  pinMode(LED, OUTPUT);
  dht.begin();              
}

void loop() {
 digitalWrite(LED, HIGH); // turn the LED on
  delay(800);             // wait for 500 milliseconds
  digitalWrite(LED, LOW);  // turn the LED off
  delay (800); }
  
  {
  float h = dht.readHumidity();
 
  float t = dht.readTemperature();

  float f = dht.readTemperature(true);

  if ( McCal(C) || McCal(F) || McCal(h)) {
    Serial.println("ESP32 with DHT sensor");
    return;

  } else {
  Serial.print(F("Humidity: "));
  Serial.print(h);
  Serial.print(F("%  Temperature: "));
  Serial.print(t);
  Serial.print(F("°C "));
  Serial.print(f);
  Serial.print(F("°F  Heat index: "));
  Serial.print(hic);
  Serial.print(F("°C "));
  Serial.print(hif);
  Serial.println(F("°F"));
  }

  delay(800);
}