#define BLYNK_TEMPLATE_ID "TMPLnyEKha1z"
#define BLYNK_DEVICE_NAME "RC Project"
#define BLYNK_AUTH_TOKEN "MqoMtDEiSxroAAb9-vrbraxtx3iCzSkv"

#define BLYNK_PRINT Serial
#include <DHT.h>
#include <Blynk.h>
#include <BlynkSimpleEsp32.h>

#include <WiFi.h>

#include <ESP32Servo.h>

#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""

char auth[] = BLYNK_AUTH_TOKEN;

#define DHTPIN 4          
#define DHTTYPE DHT22      
DHT dht(DHTPIN, DHTTYPE);
BlynkTimer timer;
Servo fan;

#define LED 2
#define ALARM 5

void sendSensor(){
  float h = dht.readHumidity();
  float t = dht.readTemperature(); 
  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  Blynk.virtualWrite(V6, h);
  Blynk.virtualWrite(V5, t);
  Serial.print("Temperature : ");
  Serial.print(t);
  Serial.print('\n');
  Serial.print("Humidity : ");
  Serial.println(h);

  if(t > 40){
    Blynk.email("[email protected]", "Alert", "Temperature over 40C!");
    Blynk.logEvent("temp_alert","Temp above 40 degree");
    int pos = 0;

    digitalWrite(LED, HIGH);
    digitalWrite(ALARM, HIGH);

    for (pos = 0; pos <= 360; pos++){
      fan.write(pos);
      delay(15);
    }
  }
  else{
    digitalWrite(LED, LOW);
    digitalWrite(ALARM, LOW);
  }
}

void setup(){
  pinMode(LED, OUTPUT);
  pinMode(ALARM, OUTPUT);
  Serial.begin(115200);
  Blynk.begin(auth, WIFI_SSID, WIFI_PASSWORD);
  dht.begin();
  timer.setInterval(2500L, sendSensor);
  fan.attach(13);
}

void loop(){
  Blynk.run();
  timer.run();
}