#define BLYNK_TEMPLATE_ID "YourTemplateID"
#define BLYNK_DEVICE_NAME "YourDeviceName"
#define BLYNK_AUTH_TOKEN "YourAuthToken"

#define BLYNK_PRINT Serial

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

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

// Pin definitions
#define DHTPIN 15
#define DHTTYPE DHT22      // Change to DHT11 if needed
#define TRIG_PIN 12
#define ECHO_PIN 14
#define LDR_PIN 27
#define LED_PIN 2

DHT dht(DHTPIN, DHTTYPE);

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

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

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

                  void loop() {
                    Blynk.run();
                      sendSensorData();
                        delay(2000); // Send every 2 seconds
                        }

                        void sendSensorData() {
                          // DHT sensor
                            float temp = dht.readTemperature();
                              float hum = dht.readHumidity();

                                // Ultrasonic sensor
                                  digitalWrite(TRIG_PIN, LOW);
                                    delayMicroseconds(2);
                                      digitalWrite(TRIG_PIN, HIGH);
                                        delayMicroseconds(10);
                                          digitalWrite(TRIG_PIN, LOW);
                                            long duration = pulseIn(ECHO_PIN, HIGH);
                                              float distance = duration * 0.034 / 2;

                                                // LDR digital read
                                                  int ldrStatus = digitalRead(LDR_PIN); // 1 = DARK, 0 = LIGHT

                                                    // Debug prints
                                                      Serial.print("Temp: "); Serial.println(temp);
                                                        Serial.print("Humidity: "); Serial.println(hum);
                                                          Serial.print("Distance: "); Serial.println(distance);
                                                            Serial.print("LDR: "); Serial.println(ldrStatus);

                                                              // Send to Blynk
                                                                Blynk.virtualWrite(V0, temp);
                                                                  Blynk.virtualWrite(V1, hum);
                                                                    Blynk.virtualWrite(V2, distance);
                                                                      Blynk.virtualWrite(V3, ldrStatus);
                                                                      }