//* How to use the DHT-22 sensor with Arduino
//   Temperature and humidity sensor and
//   I2C LCD1602
 //  SDA --> A4
 //  SCL --> A5
 //DHT 22 out-->D7

//Libraries
#include <DHT.h>;
//I2C LCD:
#include <LiquidCrystal_I2C.h>
#include <Wire.h>

LiquidCrystal_I2C lcd(0x27,16,2); // set the LCD address to 0x27 for a 16 chars and 2 line display,Pls check your lcd.
  
//Constants
#define DHTPIN 7     // what pin we're connected to
#define DHTTYPE DHT22   // DHT 22
DHT dht(DHTPIN, DHTTYPE); //// Initialize DHT sensor for normal 16mhz Arduino

//Variables
//int chk;
int h;  //Stores humidity value
int t; //Stores temperature value

void setup()
{
    Serial.begin(15000);
    Serial.println("Temperature and Humidity Sensor Test");
    dht.begin();
    lcd.init(); //initialize the lcd
    lcd.backlight(); //open the backlight
}

void loop()
{
    //Read data and store it to variables h (humidity) and t (temperature)
    // Reading temperature or humidity takes about 250 milliseconds!
    h = dht.readHumidity();
    t = dht.readTemperature();
    
    //Print temp and humidity values to serial monitor
    Serial.print("Humidity: ");
    Serial.print(h);
    Serial.print(" %, Temp: ");
    Serial.print(t);
    Serial.println(" ° Celsius");
        
// set the cursor to (0,0):
// print from 0 to 9:

    lcd.setCursor(0, 0);
    lcd.print("TEMP:");
    lcd.print(t);
    lcd.print(char(223));
    lcd.print("C");

    lcd.setCursor(0, 1);
    lcd.print("HUMI:");
    lcd.print(h);
    lcd.print("%");
    
  delay(50); //Delay 0.25 sec.
}