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

WiFiClient WIFI_CLIENT;
PubSubClient MQTT_CLIENT(WIFI_CLIENT); 

long buducnost = 0;

void reconnect() 
{
  while (!MQTT_CLIENT.connected()) 
  {
    Serial.println("Pripajanie sa ku MQTT brokeru...");
    if (MQTT_CLIENT.connect("UCITEL")) 
    {
      Serial.println("Pripojene...");
    } 
    else 
    {
      Serial.print("Nepripojene (3sek)... ");
      delay(3000);
    }
  }
}

void setup() 
{  
  WiFi.mode(WIFI_STA);

  Serial.begin(9600);
  WiFi.begin("Wokwi-GUEST", "", 6);
  while (WiFi.status() != WL_CONNECTED) 
  {
    delay(250);
    Serial.print(".");
  }
  Serial.print("WIFI uspesne pripojena: ");
  Serial.println(WiFi.localIP());

  MQTT_CLIENT.setServer("broker.hivemq.com", 1883);
    pinMode(34, INPUT);
}

void loop() 
{
  if (!MQTT_CLIENT.connected()) 
    reconnect();

  MQTT_CLIENT.loop();

  if (millis() > buducnost) 
  {  
    int a = analogRead(34);
    Serial.println(a);
    

    char msg[10];
    itoa(a, msg, 10); 
    
    MQTT_CLIENT.publish("ahoj", msg); 
    Serial.print("analogRead:");
    Serial.println(a);
    Serial.print("Odoslane: ");
    Serial.println(msg);
   
    buducnost = millis() + 3000; 
  }
}