Code file

#include <LiquidCrystal_I2C.h>
#include "DHT.h"
#define DHTPIN 2 
#define DHTTYPE DHT22  


#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  lcd.init();
  lcd.backlight();
  // you can now interact with the LCD, e.g.:
  lcd.println(F("DHTxx test!"));
  dht.begin();
  Serial.begin(9600);
}

void loop() {
  delay(2000);

    lcd.clear();
  
    float h = dht.readHumidity();
    float f = dht.readTemperature(true);

      if (isnan(h) || isnan(f)) {
    lcd.println(F("Failed to read from DHT sensor!"));
    return;
  }
 lcd.setCursor(0,1);
  lcd.print("humid: ");
  lcd.print(h);
  lcd.print("%");
 lcd.setCursor(0,0);
  lcd.print("temp: ");
  lcd.print(f);
  lcd.write(223);
  lcd.print("F");

  serupdate(h,f);
}

void serupdate(float h, float f){
  Serial.println(f);
  Serial.println(h);
}