#define BLYNK_TEMPLATE_ID "TMPL3PkisgMb9"
#define BLYNK_TEMPLATE_NAME "Hello LED 2"
#define BLYNK_AUTH_TOKEN "wX9R0qNKEtPLSmaUMjQdFtG5IpZrXhEN"


#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <DHT.h>


char ssid[] = "Wokwi-GUEST";
char pass[] = "";

#define DHTPIN 4
#define DHTTYPE DHT22               //Temperature //
DHT dht(DHTPIN, DHTTYPE);

#define MQPIN 34                    //Gas//

#define TRIG 5
#define ECHO 18                     //Ultrasonic//


#define TEMP V2
#define Hum V1
#define MQSEN V0



float h;
float t;

int threshold=50;
int gasThresh = 50;




bool tempAlertSent = false;
bool gasAlertSent = false;


void setup() 
{
  Serial.begin(115200);
  dht.begin();

  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);

}

void loop() 

  {
  Blynk.run();

// ........TEMPERATURE SENSOR........//

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

  Blynk.virtualWrite(TEMP,t);
  Blynk.virtualWrite(Hum,h);

if(t>50 && !tempAlertSent)
{
  Serial.println("Temperature is high");
  Blynk.logEvent("temp_alertsent", "High Temperature");
  tempAlertSent= true;
}
else if(t<50)
{
  Serial.println("Temperature is low");
  tempAlertSent=false;
}
 

//. ......MQ SENSOR.......//

  int mqvalue=analogRead(34);
  int mapvalue=map(mqvalue,0,4095,0,100);
  Blynk.virtualWrite(MQSEN, mapvalue);

  if (mapvalue> gasThresh && !gasAlertSent)
  {
    Serial.println("High Gas");
    Serial.print(mapvalue);
    Blynk.logEvent("gas_alert", "High level of Gas");
    gasAlertSent = true;
  }
  else if (mapvalue < gasThresh)
  {
    gasAlertSent = false;
  }
   Serial.print("Temperature :");
  Serial.print(t);
  Serial.print("||");
  Serial.print("Humidity: ");
  Serial.print(h);
  Serial.print("||");
  Serial.print("MQ Value: ");
  Serial.println(mapvalue);
  delay(1000);
}