#define BLYNK_TEMPLATE_ID "TMPL6Pu11KVHU"
#define BLYNK_TEMPLATE_NAME "rter"
#define BLYNK_AUTH_TOKEN "qWOJrr_2skUNk-KQEKFH32r3sfiEbadc"

#include "DHT.h"
#define DHTPIN 14     
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

#define BLYNK_PRINT Serial
#include "WiFi.h"
#include "WiFiClient.h"
#include "BlynkSimpleEsp32.h"

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

#define TRIG_PIN 23
#define ECHO_PIN 22
int led1 = 16;
int led2 = 4;
int led3 = 2;

unsigned long previousMillis = 0;  
const long interval = 1000;        

void setup() {
  Serial.begin(115200);
  Blynk.begin(auth, ssid, pass);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  Serial.println(F("DHT22 example!"));
  dht.begin();
}

void loop() {
  unsigned long currentMillis = millis();
  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;
    readSensorsAndControl();
  }

  Blynk.run(); 
}

void readSensorsAndControl() {
  int duration, distance;
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  if (isnan(temperature) || isnan(humidity)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);

  duration = pulseIn(ECHO_PIN, HIGH);
  distance = 1 + (duration * 0.034 / 2); 

  
  if (temperature > 20) {
    digitalWrite(led1, HIGH);
    Blynk.virtualWrite(V3, 1); 
  } else {
    digitalWrite(led1, LOW);
    Blynk.virtualWrite(V3, 0); 
  }

  
  if (humidity > 50) {
    digitalWrite(led2, HIGH);
    Blynk.virtualWrite(V4, 1); 
  } else {
    digitalWrite(led2, LOW);
    Blynk.virtualWrite(V4, 0); 
  }


  if (distance > 200) {
    digitalWrite(led3, HIGH);
    Blynk.virtualWrite(V5, 1); 
  } else {
    digitalWrite(led3, LOW);
    Blynk.virtualWrite(V5, 0); 
  }

  
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");

  Serial.print(F("Humidity: "));
  Serial.print(humidity);
  Serial.print(F("%  Temperature: "));
  Serial.print(temperature);
  Serial.println(F("°C"));

  Blynk.virtualWrite(V1, humidity);
  Blynk.virtualWrite(V0, temperature);
  Blynk.virtualWrite(V2, distance);
}