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

// Defina suas credenciais Wi-Fi e do servidor MQTT
const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "test.mosquitto.org";


WiFiClient espClient;
PubSubClient client(espClient);
long lastMsg = 0;
char msg[50];
int value = 0;

void setup() {
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
}

void setup_wifi() {
  delay(10);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    if (client.connect("ESPClient")) {
      Serial.println("connected");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds"); 
      delay(5000);
    }
  }
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop(); 

  // Geração aleatória de temperatura e umidade
  float t = random(200, 350) / 10.0; // Temperatura entre 20.0°C e 35.0°C
  float h = random(300, 700) / 10.0; // Umidade entre 30.0% e 70.0%

  // Publica a temperatura no MQTT
  snprintf(msg, 50, "%.2f", t);
  client.publish("/ThinkIOT/DHT22/Temperature", msg);

  // Publica a umidade no MQTT
  snprintf(msg, 50, "%.2f", h);
  client.publish("/ThinkIOT/DHT22/Humidity", msg);

  delay(2000); // Aguarda 2 segundos antes de gerar novos valores
}