#define BLYNK_TEMPLATE_ID "TMPL6Hf2XkGNL"
#define BLYNK_TEMPLATE_NAME "themiya"
#define BLYNK_PRINT Serial

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

// Replace with your credentials
char auth[] = "XnFqmDXj_V8IpuZBSDcWc5Febr8R43R8";
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

#define LED_PIN 12 
#define DHT_PIN 13 
#define DHT_TYPE DHT22 

#define TRIG_PIN 5   // Ultrasonic Sensor Trigger Pin
#define ECHO_PIN 4  // Ultrasonic Sensor Echo Pin

DHT dht(DHT_PIN, DHT_TYPE);

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

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

// Control LED (V0)
BLYNK_WRITE(V0) {
  digitalWrite(LED_PIN, param.asInt());
}

// Send DHT22 data (V1 - Humidity, V2 - Temperature)
void sendSensorData() {
  float temp = dht.readTemperature();
  float hum = dht.readHumidity();

  if (!isnan(temp) && !isnan(hum)) {
    Blynk.virtualWrite(V1, hum);
    Blynk.virtualWrite(V2, temp);
  }
}

void getDistance(){
digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  
  long duration = pulseIn(ECHO_PIN, HIGH);
  int distance =  duration * 0.017;  // Convert to cm

  Blynk.virtualWrite(V3, distance);
}

void loop() {
  Blynk.run();
  sendSensorData();
  delay(200);  // Send data every 2 seconds
  getDistance();
  delay(100);
}