#include "DHT.h"
#include "LiquidCrystal.h"
#define DHTPIN 5
#define DHTTYPE DHT22 
#define INTERVAL_GET_DATA 2000 

DHT dht(DHTPIN, DHTTYPE);
unsigned long millis_int1 = 0;

LiquidCrystal lcd(19, 23, 4, 0, 2, 15);

void setup() {
pinMode(21, OUTPUT); 
pinMode(2, OUTPUT); 
lcd.begin(16, 2);
Serial.begin(9600); 
 dht.begin(); 
}

void loop() {
 if(millis()-millis_int1 >= INTERVAL_GET_DATA) {
 int humidity = get_data_humidity();
 int temperature = get_data_temperature();
 Serial.print("humidity=");
 Serial.println(humidity);
 Serial.print("temperature=");
 Serial.println(temperature);
 millis_int1 = millis();
 lcd.clear();
 lcd.print("humidity = ");
 lcd.println(humidity);
 lcd.setCursor(0, 2);
 lcd.print("temperature =");
 lcd.println(temperature);
    if (humidity >= 70) {
      digitalWrite(21, HIGH);
    }
    else {
      digitalWrite(21, LOW);
    }
    if (temperature >= 70) {
      digitalWrite(2, HIGH);
    }
    else {
      digitalWrite(2, LOW);
    }
  }
}
int get_data_humidity() {
 int h = dht.readHumidity();
 return h;
}
int get_data_temperature() {
  int t = dht.readTemperature();
  return t;
}