#define BLYNK_TEMPLATE_ID "TMPL6n9dQ8Jp-"
#define BLYNK_TEMPLATE_NAME "AK"
#define BLYNK_DEVICE_NAME "ESP32 Sensor IOT"

#define BLYNK_PRINT Serial
#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>

char auth[] = "NkfwuDY0YYHYOSBGQDYvJFgb2KojxO6l";
char ssid[] = "AK Network";
char pass[] = "zxcvbnm#";

LiquidCrystal_I2C lcd(0x27, 16, 2);

#define DHTPIN 4
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);

float t, h;

void setup() {
    lcd.init();
    lcd.backlight();
    Serial.begin(115200);
    
    Blynk.begin(auth, ssid, pass);

    while (Blynk.connect() == false) {
        // Đợi cho đến khi kết nối
    }
    lcd.clear();
    lcd.print("Connected!");

    dht.begin();
}

void loop() {
    Blynk.run();

    h = dht.readHumidity();
    t = dht.readTemperature();

    if (isnan(h) || isnan(t)) {
        Serial.println("Failed to read from DHT sensor!");
        lcd.setCursor(0, 0);
        lcd.print("DHT Error!");
        return;
    }

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Temp: ");
    lcd.print(t);
    lcd.print(" C");
    
    lcd.setCursor(0, 1);
    lcd.print("Humidity: ");
    lcd.print(h);
    lcd.print(" %");

    Blynk.virtualWrite(V0, t);
    Blynk.virtualWrite(V1, h);

    Serial.print("Nhiet do: ");
    Serial.print(t);
    Serial.print(" C, Do am: ");
    Serial.print(h);
    Serial.println(" %");

    delay(2000);
}