#include <WiFi.h>
#include <HTTPClient.h>

// Wi-Fi credentials
const char* ssid = "Wokwi-GUEST"; // Use "Wokwi-GUEST" for simulation
const char* password = ""; // No password needed for Wokwi Wi-Fi simulation

// ThingSpeak API details
const char* server = "http://api.thingspeak.com/update";
String apiKey = "1VBD86KE8ESLDZVS"; // Replace with actual API Key (for real-world use)

void setup() {
  Serial.begin(115200);
  
  // Connect to Wi-Fi
  Serial.print("Connecting to WiFi");
  WiFi.begin(ssid, password);
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  
  Serial.println("\nConnected to WiFi!");
  Serial.println("ESP32 IP Address: " + WiFi.localIP().toString());
}

void loop() {
  if (WiFi.status() == WL_CONNECTED) { // Check if Wi-Fi is connected
    HTTPClient http;

    // Generate random sensor data for simulation
    int temperature = random(20, 35);
    int humidity = random(40, 80);

    // Construct the request URL
    String url = String(server) + "?api_key=" + apiKey + "&field1=" + String(temperature) +
                 "&field2=" + String(humidity);

    http.begin(url);
    int httpResponseCode = http.GET(); // Send GET request
    http.end(); // Close connection

    // Print data to Serial Monitor
    Serial.print("Data Sent to ThingSpeak - Temperature: ");
    Serial.print(temperature);
    Serial.print("°C, Humidity: ");
    Serial.print(humidity);
    Serial.println("%");

  } else {
    Serial.println("Wi-Fi Disconnected. Reconnecting...");
    WiFi.disconnect();
    WiFi.reconnect();
  }
  
  delay(15000); // Wait 15 seconds before sending the next data
}