#include <LiquidCrystal_I2C.h>
#include "DHT.h"
#define DHTPIN 2
#define DHTTYPE DHT11

LiquidCrystal_I2C lcd(0x27, 16, 2);  // I2C address 0x3F, 16 column and 2 rows
DHT dht(DHTPIN, DHTTYPE);

const int hot = 27;
const int cold = 22;
const int high = 61;
const int low = 39;
void setup()
{
  dht.begin();     // initialize the sensor
  lcd.init();      // initialize the lcd
  lcd.backlight(); // open the backlight 
  pinMode(12, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(9, OUTPUT);
  }

void loop()
{
  delay(2000); // wait a few seconds between measurements

  float humi  = dht.readHumidity();    // read humidity
  float tempC = dht.readTemperature(); // read temperature

lcd.clear();
  // check if any reads failed
  if (isnan(humi) || isnan(tempC)) {
    lcd.setCursor(0, 0);
    lcd.print("Failed");
  } else {
    lcd.setCursor(0, 0);  // start to print at the first row
    lcd.print("Temp: ");
    lcd.print(tempC);     // print the temperature
    lcd.print((char)223); // print ° character
    lcd.print("C");

    lcd.setCursor(0, 1);  // start to print at the second row
    lcd.print("Humi: ");
    lcd.print(humi);      // print the humidity
    lcd.print("%");
  }

delay(3000);

  if (tempC < cold) {
    digitalWrite(12, HIGH);
    digitalWrite(11, LOW);
    lcd.setCursor(0, 0);
    lcd.print("    TOO COLD        ");
  }
  else if (tempC >= hot) {
    digitalWrite(12, HIGH);
    digitalWrite(11, LOW);
    lcd.setCursor(0, 0);
    lcd.print("    TOO HOT     ");
  }
  else {
    digitalWrite(12, LOW);
    digitalWrite(11, HIGH);
    lcd.setCursor(0, 0);
    lcd.print("    MODERATE     ");
  }

  if (humi >= high) {
    digitalWrite(10, HIGH);
    digitalWrite(9, LOW);
    lcd.setCursor(0, 1);
    lcd.print("    TOO HUMID     ");

  }
  else if (humi <= low) {
    digitalWrite(10, HIGH);
    digitalWrite(9, LOW);
    lcd.setCursor(0, 1);
    lcd.print("    TOO DRY     ");
  }
  else {
    digitalWrite(10, LOW);
    digitalWrite(9, HIGH);
    lcd.setCursor(0, 1);
    lcd.print("    MODERATE     ");
  }

}