#define BLYNK_TEMPLATE_ID "TMPL6zMe-CoQD"
#define BLYNK_TEMPLATE_NAME "dht22"
#define BLYNK_AUTH_TOKEN "B3yziHHUlIAi9etZvdV_hygWVlybJmMv"

/* Comment this out to disable prints and save space */
#define BLYNK_PRINT Serial


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

// DHT define
#define DHTTYPE DHT22   // DHT 22
#define DHTPIN 15
DHT dht(DHTPIN, DHTTYPE);

// Define LED
#define LED 13
WidgetLED LED_ON_APP(V2);
#define BUZZER 14


char auth[] ="B3yziHHUlIAi9etZvdV_hygWVlybJmMv";// BLYNK_AUTH_TOKEN
// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

int led;
int buzzer;

BLYNK_WRITE(V2)
{
  int pinValue = param.asInt(); // doc gia tri cua bien ao va tra  ve kieu Integer
  if(pinValue==1){digitalWrite(4,HIGH);}else{digitalWrite(4,LOW);}
}

void setup()
{
  // Debug console
  pinMode(LED, OUTPUT);
  digitalWrite(LED, LOW);
  Serial.begin(115200);
  pinMode(BUZZER, OUTPUT);
  digitalWrite(BUZZER, LOW);
  dht.begin();
  pinMode(4, OUTPUT);
  Blynk.begin(auth, ssid, pass);
}

void loop()
{
  Blynk.run();
  // Read Temp
  float t = dht.readTemperature();
  // Read Humi
  float h = dht.readHumidity();
  // Check isRead ?
  if (isnan(h) || isnan(t)) { // if not a number
    delay(500);
    Serial.println("Failed to read from DHT sensor!\n");
    return;
  }

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

  Serial.print("\n");
  Serial.print("Humidity: " + String(h) + "%");
  Serial.print("\t");
  Serial.print("Temperature:" + String(t) + " C");
  delay(2000);

  if((t>40)&&(h>60)){
    led = 1;
  }
  else led = 0;
  if (led) {
    digitalWrite(LED, HIGH);    
    LED_ON_APP.on();
    delay(1000);
    digitalWrite(LED, LOW);
    LED_ON_APP.off();
    delay(100);
    digitalWrite(BUZZER, HIGH);
    delay(500);  // Tắt và bật lại buzzer sau 0.5 giây
    digitalWrite(BUZZER, LOW);
    delay(500);  // Chờ 0.5 giây trước khi lặp lại quá trình
  }
  else  {
    digitalWrite(LED, LOW);
    digitalWrite(BUZZER, LOW);
    LED_ON_APP.off();
  }
}