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

#define DHT_PIN      18
#define TRIG_PIN     2
#define ECHO_PIN     4

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

const char* server = "http://api.thingspeak.com/update";
String apiKey = "XTO71MRGFIP886WP";  // Reemplaza con tu Write API Key

DHTesp dht;

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

  // Inicializar sensor DHT
  dht.setup(DHT_PIN, DHTesp::DHT22);

  // Configurar pins del HC-SR04
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);

  // Conectar Wi-Fi
  WiFi.begin(ssid, password);
  Serial.print("Conectando a WiFi");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nWiFi conectado");
}

float leeDistancia() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);

  long duracion = pulseIn(ECHO_PIN, HIGH);
  return duracion * 0.034 / 2;
}

void loop() {
  TempAndHumidity data = dht.getTempAndHumidity();
  if (isnan(data.temperature) || isnan(data.humidity)) {
    Serial.println("Error al leer DHT!");
    delay(2000);
    return;
  }

  float distancia = leeDistancia();

  Serial.printf("Temp: %.1f °C, Hum: %.1f %%, Dist: %.1f cm\n",
                data.temperature, data.humidity, distancia);

  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    String url = String(server) + "?api_key=" + apiKey
                 + "&field1=" + String(data.temperature)
                 + "&field2=" + String(data.humidity)
                 + "&field3=" + String(distancia);
    Serial.println("URL: " + url);

    http.begin(url);
    int code = http.GET();
    Serial.printf("HTTP response code: %d\n", code);
    http.end();
  } else {
    Serial.println("WiFi desconectado");
  }

  delay(15000); // ThingSpeak: mínimo 15 segundos
}