#define BLYNK_TEMPLATE_ID "TMPL60LZ8LMK1"
#define BLYNK_TEMPLATE_NAME "test1"
#define BLYNK_AUTH_TOKEN "Euee8s7Omie2rT6q-WNH9jnxk9I-DMrd"



#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <DHT.h>  // Added DHT library
#include <NewPing.h>

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

#define LED_PIN 2
#define DHTPIN 4
#define DHTTYPE DHT22

#define trigPin 17
#define echoPin 5
#define led 32

NewPing sonar(trigPin, echoPin);
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(115200);
  delay(100);

  pinMode(LED_PIN, OUTPUT);
  pinMode(12, OUTPUT);

  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(led, OUTPUT);

  WiFi.begin(ssid, pass);
  Serial.print("Connecting to Wi-Fi");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nWi-Fi Connected!");
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP());

  dht.begin();  // Initialize DHT sensor
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
}

BLYNK_WRITE(V0) {
  int ledState = param.asInt();
  digitalWrite(LED_PIN, ledState);
  Serial.println(ledState ? "LED ON" : "LED OFF");
}

void loop() {
  Blynk.run();
  dhtsensor();

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

  unsigned int distance_cm = sonar.ping_cm();
  distance_cm = (distance_cm);

  if(distance_cm < 50){
    digitalWrite(led, HIGH);
    delay(2000);
    digitalWrite(led, LOW);
    delay(500);
    digitalWrite(led, HIGH);
  }
  else{
    digitalWrite(led, LOW);
  }

  Blynk.virtualWrite(V3, distance_cm);

  Serial.print("Stem Displacement: ");
  Serial.print(distance_cm);
  Serial.println(" mm");

}

void dhtsensor() {
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();
  float f = dht.readTemperature(true);  // Fahrenheit reading

  if (isnan(humidity) || isnan(temperature) || isnan(f)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }
  
  float hif = dht.computeHeatIndex(f, humidity);
  float hic = dht.computeHeatIndex(temperature, humidity, false);

  Blynk.virtualWrite(V2, temperature);  // Send temperature to V2
  Blynk.virtualWrite(V1, humidity);     // Send humidity to V1

  if(temperature < 25){
    delay(1000);
    tone(12,250);
    delay(1000);
    noTone(12);

  }
  
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.print(" °C, Humidity: ");
  Serial.print(humidity);
  Serial.println(" %");
  
  delay(2000);  // Delay between readings
}