//http://hivemq.com/demos/websocket-client/ 

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

WiFiClient WIFI_CLIENT;
PubSubClient MQTT_CLIENT;

int potenciometer;


void setup() 
{
  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());
}

void loop() 
{
   if (!MQTT_CLIENT.connected()) 
    reconnect();
            
    
   potenciometer = analogRead(13);
   float percenta = map(potenciometer,0,4095,0,100);
   Serial.println(percenta);

   char udaj[3];
   String(percenta).toCharArray(udaj,3);
   MQTT_CLIENT.publish("SPSKNM/TOPIC", udaj);

   delay(1000);
}


void reconnect() 
{
   MQTT_CLIENT.setServer("broker.hivemq.com", 1883);
   MQTT_CLIENT.setClient(WIFI_CLIENT);
   while (!MQTT_CLIENT.connected()) 
   {
      Serial.println("Pripajanie sa ku MQTT brokeru...");
      MQTT_CLIENT.connect("UCITEL");
      delay(3000);
   }
   Serial.println("Pripojenie prebehlo uspesne!");
}