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

// Replace with your WiFi credentials
const char* ssid = "FABLAB";
const char* password = "12345678";

// Replace with your ThingSpeak Write API Key
const char* apiKey = "15DBNHTNHL25YMYN";

// ThingSpeak API URL
const char* server = "http://api.thingspeak.com/update";

void setup() {
    Serial.begin(115200);
    WiFi.begin(ssid, password);
    
    Serial.print("Connecting to WiFi...");
    while (WiFi.status() != WL_CONNECTED) {
        Serial.print(".");
        delay(1000);
    }
    Serial.println("\nConnected to WiFi!");
}

void loop() {
    if (WiFi.status() == WL_CONNECTED) {
        HTTPClient http;
        
        // Generate random values
        int value1 = random(20, 40);  // Example: Temperature
        int value2 = random(30, 60);  // Example: Humidity
        int value3 = random(100, 500); // Example: Light Intensity

        // Construct the request URL
        String url = String(server) + "?api_key=" + apiKey + 
                     "&field1=" + String(value1) + 
                     "&field2=" + String(value2) + 
                     "&field3=" + String(value3);

        Serial.println("Sending data to ThingSpeak...");
        Serial.println(url);

        // Send data to ThingSpeak
        http.begin(url);
        int httpCode = http.GET();
        
        if (httpCode > 0) {
            Serial.println("Data sent successfully!");
        } else {
            Serial.println("Failed to send data.");
        }
        
        http.end();
    } else {
        Serial.println("WiFi Disconnected!");
    }

    delay(15000); // ThingSpeak allows updates every 15 seconds
}