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

#define DHTPIN 2     
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321

DHT dht(DHTPIN, DHTTYPE);


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

int red_led = 7;
int green_led = 6;
int blue_led = 5;


LiquidCrystal_I2C LCD(0x27, 16, 4);


void setup() {
  pinMode(red_led, OUTPUT);
  pinMode(green_led, OUTPUT);
  pinMode(blue_led, OUTPUT);


  Serial.begin(115200);
  Serial.println(F("DHT22 example!"));

  dht.begin();
}

void loop() {
  LCD.begin(16, 2);
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Check if any reads failed and exit early (to try again).
  if (isnan(temperature) || isnan(humidity)) {
    
    LCD.print("Failed to read from DHT sensor!");
    return;
  }

  if(temperature <= 15.0){
    LCD.setCursor(0,0);
    LCD.print(temperature);

    LCD.setCursor(0,1);
    LCD.print("Freezing");
    led_color(255,255,0);
    Serial.println("freezing");
  }else if(temperature > 15 && temperature <= 34){
    LCD.setCursor(0,0);
    LCD.print(temperature);

    LCD.setCursor(0,1);
    LCD.print("Pleasant");

    led_color(0,0,255);
    Serial.println("ideal");
  }else {
  LCD.setCursor(0,0);
    LCD.print(temperature);

    LCD.setCursor(0,1);
    LCD.print("Humid");

    led_color(0,255,255);
    Serial.println("too hot!");
  }

  Serial.print(F("Humidity: "));
  Serial.print(humidity);
  Serial.print(F("%  Temperature: "));
  
  Serial.print(temperature);
  Serial.println(F("°C "));

  delay(2000);
}


void led_color(int red_value, int green_value,int blue_value)
{
analogWrite(red_led,red_value);
analogWrite(green_led,green_value);
analogWrite(blue_led,blue_value);
}