#define BLYNK_PRINT Serial
#define BLYNK_TEMPLATE_ID "TMPL6rMpvaoLX"
#define BLYNK_TEMPLATE_NAME "MQ2TEST1"
#define BLYNK_AUTH_TOKEN "JvaB5syzRjynneD58w4azTPHPYH95ZSm"

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <string.h>
//#include "DHT.h"
#include "DHTesp.h"

// DHT define
#define DHTTYPE DHT11   // DHT 11 type
#define DHT_PIN 14
#define MQ2    32

#define LEDRED 27  //chan 27 led do
#define LEDGREEN 26 //chan 26 led xanh

int buttonred, buttongreen;

WidgetLED appledred(V4);  //gọi app led đỏ là chân V4
WidgetLED appledgreen(V5); //gọi app led xanh là chân V5

//DHT dht(DHTPIN, DHTTYPE); // Khởi tạo đối tượng cảm biến DHT11
DHTesp dhtSensor;

char auth[] = BLYNK_AUTH_TOKEN;  //token xac thuc blynk
// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

void setup()
{
  // Debug console

  Serial.begin(9600);
  //dht.begin();
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);

  Blynk.begin(auth, ssid, pass);
  pinMode(LEDRED, OUTPUT);
  pinMode(LEDGREEN, OUTPUT);
}

//XET TIN HIEU V2 TREN BLYNK
BLYNK_WRITE(V2) //truyen du lieu tu blynk sang esp32
{
  buttonred = param.asInt(); // Lấy giá trị từ nút bật/tắt
  if(buttonred==1)
  {
    digitalWrite(LEDRED, HIGH); //dieu khien led tren esp32
    appledred.on(); //dieu khien led tren blynk app
  }
  else
  {
    digitalWrite(LEDRED, LOW);
    appledred.off(); //dieu khien led tren blynk app
  }
}

//XET TIN HIEU V3 TREN BLYNK
BLYNK_WRITE(V3) //truyen du lieu tu blynk sang esp32
{
  buttongreen = param.asInt(); // Lấy giá trị từ nút bật/tắt
  if(buttongreen==1)
  {
    digitalWrite(LEDGREEN, HIGH); //dieu khien led tren esp32
    appledgreen.on(); //dieu khien led tren blynk app
  }
  else
  {
    digitalWrite(LEDGREEN, LOW); //dieu khien led tren esp32
    appledgreen.off(); //dieu khien led tren blynk app
  }
}

void loop()
{
  Blynk.run();
  // Read Gas
  int MQ2value = analogRead(MQ2);

  TempAndHumidity  data = dhtSensor.getTempAndHumidity();
  // Read Temp
  //float t = dht.readTemperature();  
  // Read Humi
  //float h = dht.readHumidity();  
  // Check isRead ?
  if (isnan(data.humidity) || isnan(data.temperature)) {
    delay(500);
    Serial.println("Failed to read from DHT sensor!\n");
    return;
  }

  Blynk.virtualWrite(V0, data.temperature);
  Blynk.virtualWrite(V1, data.humidity);
  Blynk.virtualWrite(V6, MQ2value);

  Serial.print("\n");
  Serial.print("Humidity: " + String(data.humidity) + "%");
  Serial.print("\t");
  Serial.print("Temperature:" + String(data.temperature) + " C");
  //delay(2000);
}