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

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "m4.wqtt.ru";
const char* mqtt_login = "";
const char* mqtt_password = "";

WiFiClient espClient;
PubSubClient client(espClient);

void setup_wifi() {

  delay(10);
  // We start by connecting to a WiFi network
  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(".");
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    String clientId = "MqttDeviceName";
    if (client.connect(clientId.c_str(), mqtt_login, mqtt_password)) {
      Serial.println("connected");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
    }
  }
}

void setup() {
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 10084);
}

void loop() {
  static float timer0 = 0;
  float mil = millis();
  if (!client.connected() && mil - timer0 > 5000) {
    timer0 = mil;
    reconnect();
  }
  client.loop();
  
  static float timer1 = 0;
  mil = millis();
  if (mil - timer1 > 2000) {
    timer1 = mil;
    char msg[50];
    snprintf (msg, 50, "hello world #%ld", random(10));
    Serial.print("Publish message: ");
    Serial.println(msg);
    client.publish("outTopic", msg);
  }
}