#include <WiFi.h>
#include <PubSubClient.h>
#include <DHTesp.h>

///////////////////////////////////////////////////////////////
const int DHT_PIN = 15;
DHTesp dht;
const char* ssid = "Wokwi-GUEST"; // WiFi SSID
const char* password = "";
const char* mqtt_server = "3.22.54.33"; // MQTT server URL
/////////////////////////////////////////////////////////////////
String mensajeMQTT;
WiFiClient espClient;
PubSubClient client(espClient);
unsigned long lastMsg = 0;
float temp = 0;
float hum = 0;
////////////////////////////////////////////////////////////////////
const int LED_GREEN_PIN = 18; // Change according to the connection of your ESP32
const int LED_RED_PIN = 5; // Change according to the connection of your ESP32
const int LED_YELLOW_PIN = 19; // Change according to the connection of your ESP32
/////////////////////////////////////////////////////////////////////
void setup_wifi() {
  delay(10);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  randomSeed(micros());
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

//////////////////////////////////////////////////////////////////
void callback(char* topic, byte* payload, unsigned int length) {
 // Serial.print("Message arrived [");
 /// Serial.print(topic);
  //Serial.print("] ");
  mensajeMQTT = "";
  for (int i = 0; i < length; i++) {
    mensajeMQTT += (char)payload[i];
  }
  Serial.println(mensajeMQTT);
}

////////////////////////////////////////////////////////////////////
void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    String clientId = "ESP32Client-";
    clientId += String(random(0xffff), HEX);
    if (client.connect(clientId.c_str())) {
      Serial.println("Connected");
      client.subscribe("testtopic/actuador");
      //client.subscribe("testtopic/Humedad");
      Serial.println("Estamos adentro muchachos");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

/////////////////////////////////////////////////////////////////////
void setup() {
  pinMode(2, OUTPUT);
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
  dht.setup(DHT_PIN, DHTesp::DHT22);
  pinMode(LED_GREEN_PIN, OUTPUT);
  pinMode(LED_RED_PIN, OUTPUT);
  pinMode(LED_YELLOW_PIN, OUTPUT);
}

///////////////////////////////////////////////////////////////////
void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
  Serial.print("Humedad ");
  Serial.println(mensajeMQTT);
  delay(1000);
  
  }