#include <LiquidCrystal_I2C.h>

#define I2C_ADDR 0x27
#define LCD_COLUMNS 20
#define LCD_LINES 6

#include "DHT.h"

#define DHTPIN 2     
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321

DHT dht(DHTPIN, DHTTYPE);


LiquidCrystal_I2C lcd(I2C_ADDR,LCD_COLUMNS, LCD_LINES);


void setup() {
  lcd.init();
  lcd.backlight();
  Serial.begin(115200);
  Serial.println(F("DHT22 example!"));
  pinMode(4, OUTPUT); // set pin #8 as OUTPUT pin
  pinMode(3, OUTPUT); // set pin #8 as OUTPUT pin
  pinMode(7, OUTPUT); // set pin #8 as OUTPUT pin




  dht.begin();

}

void loop() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Check if any reads failed and exit early (to try again).
  if (isnan(temperature) || isnan(humidity)) {
    lcd.setCursor(3, 0);
    lcd.println(F("Failed to read from DHT sensor!"));
    return;
  }
   lcd.setCursor(1, 0);
  lcd.print(F("Humidity: "));
   lcd.setCursor(1, 1);
  lcd.print(humidity);
  delay(2000);
  lcd.setCursor(1, 0);
  lcd.print(F("Temperature: "));
   lcd.setCursor(1, 1);
  lcd.print(temperature);
  lcd.println(F(" °C "));

  if (temperature > 10 && temperature <35)
  {
      digitalWrite(7, HIGH); // write a digital signal HIGH to pin 8

  }
    if (temperature > 36)
  {
      digitalWrite(4, HIGH); // write a digital signal HIGH to pin 8

  }

    if (humidity > 10)
  {
      digitalWrite(3, HIGH); // write a digital signal HIGH to pin 8

  }

  // Wait a few seconds between measurements.
  delay(2000);


}