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

#define DHTPIN 15
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

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

const char* apiKey = "JRQ2XG652VM3CAYE";
const char* server = "http://api.thingspeak.com/update";

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

  WiFi.begin(ssid, password);
  Serial.print("Connecting to WiFi");

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("\nWiFi Connected");
}

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

  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;

    String url = String(server) +
                 "?api_key=" + apiKey +
                 "&field1=" + String(temperature) +
                 "&field2=" + String(humidity);

    http.begin(url);
    int httpCode = http.GET();

    if (httpCode > 0) {
      Serial.println("Data sent to ThingSpeak successfully");
    } else {
      Serial.println("Error sending data");
    }

    http.end();
  }

  delay(15000); // ThingSpeak minimum delay
}