#include <LiquidCrystal_I2C.h>
#include <Wire.h>

#include "DHT.h"

#define DHTPIN 25    
#define led 19
#define DHTTYPE DHT22   
DHT dht(DHTPIN, DHTTYPE);
const int trigPin = 5;
const int echoPin = 18;
long duration;
float distanceCm;
float distanceInch;
#define SOUND_SPEED 0.034
LiquidCrystal_I2C lcd(0x27,16,2);
void setup()
{
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.print("temp:");
  lcd.setCursor(0,1);
  lcd.print("humid:");
   dht.begin();
   pinMode(trigPin, OUTPUT); 
  pinMode(echoPin, INPUT); 
   pinMode(led, OUTPUT); 

}

void loop()
{
   digitalWrite(led, LOW); 
 float h = dht.readHumidity();
  
  float t = dht.readTemperature();

  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  duration = pulseIn(echoPin, HIGH);

  distanceCm = duration * SOUND_SPEED/2;
if(distanceCm<100)
   {
      digitalWrite(led, HIGH);
      lcd.setCursor(0,0);
      lcd.print("hay thoi vao may");
    delay(2000);
    lcd.clear();
    delay(1000);
   } 
   if(t>10)
      { 
      lcd.display();
        lcd.setCursor(0,0);
      lcd.print(t);
       lcd.setCursor(0,1);
      lcd.print(h);
      delay(2000);
      lcd.clear();
      }
    
  //Serial.print("Distance (cm): ");
  //Serial.println(distanceCm);
  
  
  delay(1000);
 
}