#define BLYNK_TEMPLATE_ID "TMPL3YCdR-TsU"
#define BLYNK_TEMPLATE_NAME "Environment"
#define BLYNK_AUTH_TOKEN "hxY43rR6kr4Frs4BGMtTP-xSqKJRqx59"
#define BLYNK_PRINT Serial
#include <DHT.h>
#include <LiquidCrystal_I2C.h>
#include <BlynkSimpleEsp32.h> 
LiquidCrystal_I2C lcd(0x27, 16, 2);
//Constants:
#define DHTPIN 2          
#define DHTTYPE DHT22     
#define light 25
DHT dht(DHTPIN, DHTTYPE); 
char auth[]=BLYNK_AUTH_TOKEN;
char ssid[]="WOKWI-GUEST";
char pass[]="";
//Variables:
float H; //Humidity value
float T; //Temperature value
void sendSensorData()
{
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  if (isnan(temperature) || isnan(humidity))
  {
    Serial.println("Failed to read from DHT sensor");
    return;
  }

  Blynk.virtualWrite(V1, temperature); // Send temperature to Blynk Virtual Pin V5
  Blynk.virtualWrite(V2, humidity);    // Send humidity to Blynk Virtual Pin V6
  // Send light level to Blynk Virtual Pin V7
}
void setup() {
  lcd.init();
  lcd.backlight();
  Blynk.begin(auth,ssid,pass);
  dht.begin();
  pinMode(light,OUTPUT);
  Serial.begin(9600);
  Serial.println("DHT22 sensor with Arduino Uno R3!");
 
}

void loop() {
  Blynk.run();
  delay(2000);
  H = dht.readHumidity();
  T = dht.readTemperature();
  Serial.print("Humidity: ");
  Serial.print(H);
  Serial.println(" %; ");
  Serial.print("Temperature: ");
  Serial.print(T);
  Serial.println(" Celsius.\n");
  if (H >= 70.00 && T >= 30.00) {
    digitalWrite(light,HIGH);
    lcd.println("   Too warm!    ");
    lcd.setCursor(0, 1);
    lcd.println("   Cool down!   ");
    lcd.setCursor(0, 0);
    delay(2000);
    digitalWrite(light,LOW);
  } else {
    lcd.println("Temp. & hum. are");
    lcd.setCursor(0, 1);
    lcd.println("in normal limits");
    lcd.setCursor(0, 0);
  }
  if (H < 70.00 && T >= 30.00) {
    lcd.println("Be ware!        ");
    lcd.setCursor(0, 1);
    lcd.println("Temp. too high! ");
    lcd.setCursor(0, 0);
  }
  if (H >= 70.00 && T < 30.00) {
    lcd.println("Be ware!" );
  }
}