如何将 NodeMcu ESp8266(lua) 连接到 Mosquitto MQTT Broker？

Question

我的问题是我尝试将 NodeMcu ESP 8266(Lua) 连接到 mosquitto mqtt 代理。我在控制台中创建了一个 mosquitto 主题监听器，这样我就可以测试它是否有效，我从另一个控制台向该主题发送了一些消息并显示了它们但是当我尝试在 arduino 上做同样的事情时它没有显示任何消息：

mosquitto_sub -v -t 'test/topic'

这就是我创建服务器的方式，也是我发送测试消息的方式：

mosquitto_pub -t 'test/topic' -m 'helloWorld'

.
这是在 NodeMcu 板上使用的代码：

这是针对我的 ip 和 wifi 修改的 PubSubClient 库中的 mqtt_esp8266 草图示例 我说谷歌上的一些帖子说那个防火墙可能与此有关，我多次停用它，仍然没有用

#include <PubSubClient.h>
// Update these with values suitable for your network.
const char* ssid = "310";
const char* password = "1234567890";
const char* mqtt_server = "192.168.0.114";
WiFiClient espClient;
PubSubClient client(espClient);
unsigned long lastMsg = 0;
#define MSG_BUFFER_SIZE (50)
char msg[MSG_BUFFER_SIZE];
int value = 0;

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(".");
  }

  randomSeed(micros());

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

void callback(char* topic, byte* payload, unsigned int length) {
  Serial.print("Message arrived [");
  Serial.print(topic);
  Serial.print("] ");
  for (int i = 0; i < length; i++) {
    Serial.print((char)payload[i]);
  }
  Serial.println();

  // Switch on the LED if an 1 was received as first character
  if ((char)payload[0] == '1') {
    digitalWrite(BUILTIN_LED, LOW);   // Turn the LED on (Note that LOW is the voltage level
    // but actually the LED is on; this is because
    // it is active low on the ESP-01)
  } else {
    digitalWrite(BUILTIN_LED, HIGH);  // Turn the LED off by making the voltage HIGH
  }

}

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Create a random client ID
    String clientId = "ESP8266Client-";
    clientId += String(random(0xffff), HEX);
    // Attempt to connect
    if (client.connect(clientId.c_str())) {
      Serial.println("connected");
      // Once connected, publish an announcement...
      client.publish("test/topic", "hello world");
      // ... and resubscribe
      client.subscribe("inTopic");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}

void setup() {
  pinMode(BUILTIN_LED, OUTPUT);     // Initialize the BUILTIN_LED pin as an output
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
  unsigned long now = millis();
  if (now - lastMsg > 2000) {
    lastMsg = now;
    ++value;
    snprintf (msg, MSG_BUFFER_SIZE, "hello world #%ld", value);
    Serial.print("Publish message: ");
    Serial.println(msg);
    client.publish("test/topic", msg);
  }
}

14:25:01.014 -> ........
14:25:05.270 -> WiFi connected
14:25:05.270 -> IP address: 
14:25:05.270 -> 192.168.0.101
14:25:05.270 -> Attempting MQTT connection...failed, rc=-2 try again in 5 seconds
14:25:15.261 -> Attempting MQTT connection...failed, rc=-2 try again in 5 seconds

这是串行监视器输出

我没主意了，我也试过node-red但还是没成功