#define BLYNK_PRINT Serial
#define BLYNK_TEMPLATE_ID "TMPL6XG5NF5e3"
#define BLYNK_TEMPLATE_NAME "Tubes"
#define BLYNK_AUTH_TOKEN "2f4r87sP8MUn_zKsxpCGuSfLYVTyyTVT"

#include <DHT.h>
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp8266.h>

#define DHTPIN A2     
#define DHTTYPE DHT22
#define RELAY_PIN A3

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

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  pinMode(RELAY_PIN, OUTPUT); // Set relay pin as output
  Serial.begin(115200);         // Initialize serial communication
  dht.begin();                // Initialize DHT sensor
  Blynk.begin(auth);          // Initialize Blynk with authentication token
}

void sendData(float temperature){
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" *C");
}

void loop() {
  // Blynk.run(); // Process Blynk events
  delay(2000); // Wait 2 seconds between readings

  float temperature = dht.readTemperature(); // Read temperature in Celsius
  if (isnan(temperature)) { // Check if reading was successful
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  sendData(temperature); // Print temperature data

  if (temperature < 15) {
    digitalWrite(RELAY_PIN, HIGH); // Turn on relay
    Serial.println("Relay ON");
  } else {
    digitalWrite(RELAY_PIN, LOW);  // Turn off relay
    Serial.println("Relay OFF");
  }
}