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


const char* ssid = "Wokwi-GUEST";
const char* password = "";


unsigned long channelID =  2774039;
const char* apiKey = "3V2DNK4BI2ZNR13P";
#define DHTPIN 13     
#define DHTTYPE DHT22 
DHT dht(DHTPIN, DHTTYPE);
#define RELAY_PIN 5
bool relayState = false;
WiFiClient client;

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

 
  dht.begin();

  
  pinMode(RELAY_PIN, OUTPUT);
  digitalWrite(RELAY_PIN, LOW);

 
  Serial.print("Connecting to WiFi");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("Connected!");

 
  ThingSpeak.begin(client);
}

void loop() {
  
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

 
  if (isnan(temperature) || isnan(humidity)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" °C");
  Serial.print("Humidity: ");
  Serial.print(humidity);
  Serial.println(" %");

  
  if (temperature > 30.0) {
    digitalWrite(RELAY_PIN, HIGH);
    relayState = true;
  } else {
    digitalWrite(RELAY_PIN, LOW);
    relayState = false;
  }

 
  ThingSpeak.setField(1, temperature);
  ThingSpeak.setField(2, humidity);
  int responseCode = ThingSpeak.writeFields(channelID, apiKey);

  if (responseCode == 200) {
    Serial.println("Data uploaded to ThingSpeak successfully.");
  } else {
    Serial.println("Failed to upload data to ThingSpeak. Response code: " + String(responseCode));
  }

  
  delay(15000);
}