#define BLYNK_TEMPLATE_ID "YourTemplateID"
#define BLYNK_TEMPLATE_NAME "ESP32 MultiSensor"
#define BLYNK_AUTH_TOKEN "YourAuthToken"

#define BLYNK_PRINT Serial

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

#define DHTPIN 15
#define DHTTYPE DHT22  // or DHT11

#define TRIG_PIN 5
#define ECHO_PIN 18

#define LDR_PIN 4
#define LED_PIN 2

DHT dht(DHTPIN, DHTTYPE);

char ssid[] = "YourWiFiSSID";
char pass[] = "YourWiFiPassword";

// LED control from Blynk
BLYNK_WRITE(V4) {
  int ledState = param.asInt();
    digitalWrite(LED_PIN, ledState);
    }

    void setup() {
      Serial.begin(115200);
        
          pinMode(TRIG_PIN, OUTPUT);
            pinMode(ECHO_PIN, INPUT);
              pinMode(LED_PIN, OUTPUT);
                pinMode(LDR_PIN, INPUT);

                  dht.begin();
                    Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
                    }

                    long readUltrasonicDistance() {
                      digitalWrite(TRIG_PIN, LOW);
                        delayMicroseconds(2);
                          digitalWrite(TRIG_PIN, HIGH);
                            delayMicroseconds(10);
                              digitalWrite(TRIG_PIN, LOW);

                                long duration = pulseIn(ECHO_PIN, HIGH);
                                  long distance = duration * 0.034 / 2;
                                    return distance;
                                    }

                                    void loop() {
                                      Blynk.run();

                                        float temperature = dht.readTemperature();
                                          float humidity = dht.readHumidity();
                                            int ldrValue = digitalRead(LDR_PIN);
                                              long distance = readUltrasonicDistance();

                                                // Print to Serial Monitor
                                                  Serial.print("Temp: "); Serial.print(temperature);
                                                    Serial.print(" °C, Humidity: "); Serial.print(humidity);
                                                      Serial.print(" %, Distance: "); Serial.print(distance);
                                                        Serial.print(" cm, LDR: "); Serial.println(ldrValue == LOW ? "Dark" : "Light");

                                                          // Send to Blynk
                                                            Blynk.virtualWrite(V0, temperature);
                                                              Blynk.virtualWrite(V1, humidity);
                                                                Blynk.virtualWrite(V2, distance);
                                                                  Blynk.virtualWrite(V3, ldrValue == LOW ? "Dark" : "Light");

                                                                    delay(2000);  // Adjust as needed
                                                                    }