#define BLYNK_TEMPLATE_ID "TMPL6wxNsNN3g"
#define BLYNK_TEMPLATE_NAME "Smart Environmental Monitoring System"
#define BLYNK_AUTH_TOKEN "O8aX87BJkrqedwpNBaXLbw5tqeqEZjXM"

#include <DHT_U.h>
#include <ESP32Servo.h>
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

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

#define LED 4
#define DHTPIN 17
#define SERVOPIN 21
#define PIRPIN 16
#define BUTTONPIN 15

int buttonState = 0;
int switchState = 0;
int ledStateBlynk = 0;

#define DHTTYPE DHT22 // Change this to the appropriate DHT sensor type

DHT_Unified dht(DHTPIN, DHTTYPE);
Servo servo;
BlynkTimer timer;
void setup() {
  pinMode(LED, OUTPUT);
  pinMode(PIRPIN, INPUT);
  pinMode(BUTTONPIN, INPUT_PULLUP);
  Serial.begin(9600);

  dht.begin();

  servo.attach(SERVOPIN, 500, 2400);
  servo.write(0);

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

void loop() {
  Blynk.run();

  buttonState = digitalRead(BUTTONPIN);
  sensors_event_t event;
  dht.temperature().getEvent(&event);
  float temperature = event.temperature;

  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.print(" °C, Humidity: ");

  dht.humidity().getEvent(&event);
  if (!isnan(event.relative_humidity)) {
    float humidity = event.relative_humidity;
    Serial.print(humidity);
    Serial.println(" %");

    // Send temperature and humidity values to Blynk gauges
    Blynk.virtualWrite(V3, temperature);
    Blynk.virtualWrite(V4, humidity);

    if (switchState == HIGH && temperature > 30.0) {
      Serial.println("Switch turned on and temperature over 30!");
      servo.write(180);
    } else {
      servo.write(0);
    }

    const int PIRState = digitalRead(PIRPIN);
    Serial.println(PIRState);

    if (PIRState == 1) {
      digitalWrite(LED, HIGH);
      ledStateBlynk = 1;
    } else {
      digitalWrite(LED, LOW);
      ledStateBlynk = 0;
    }

    Blynk.virtualWrite(V1, PIRState);
    Blynk.virtualWrite(V2, ledStateBlynk);
    Blynk.virtualWrite(V4, humidity);
  } else {
    Serial.println("Failed to read humidity from DHT sensor");
  }

  delay(1000);
}

BLYNK_WRITE(V0) {
  switchState = param.asInt();
}

BLYNK_WRITE(V1) {
  int ledState = param.asInt();
  digitalWrite(LED, ledState);
}