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

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqttServer = "test.mosquitto.org";
int mqttPort = 1883;
const char* topic = "wokwi/test/value";

WiFiClient espClient;
PubSubClient client(espClient);

int receivedValue = 0;

void callback(char* topic, byte* payload, unsigned int length) {
  String message;
  for (int i = 0; i < length; i++) {
    message += (char)payload[i];
  }
  receivedValue = message.toInt(); // загрузка в переменную
  Serial.print("Received value: ");
  Serial.println(receivedValue);
}

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("WiFi connected");

  client.setServer(mqttServer, mqttPort);
  client.setCallback(callback);

  while (!client.connected()) {
    Serial.println("Connecting to MQTT...");
    if (client.connect("WokwiClient")) {
      Serial.println("connected");
    } else {
      delay(1000);
    }
  }

  client.subscribe(topic);
}

void loop() {
  client.loop();
}