esp8266套接字客户端没有连接到wifi网络中的nodejs服务器

Question

我正在使用esp8266作为wifi网络上nodejs服务器的客户端。 这是我的服务器代码：

var express = require('express');
var socket = require('socket.io');
var fs = require('fs');
var app = express();
var io = socket(server);
var server = app.listen(3000,'0.0.0.0',function() {
  console.log('Server connected at port 3000');
});

io.on('connection',function(socket){
  console.log('socket connected');
  socket.on('data',function (data) {
    console.log('Data transfer is ready');
  });
});

这是我的esp8266客户端代码：

#include <SocketIOClient.h>
#include <ESP8266WiFi.h>
 char* ssid     = "GD Coffee";      // SSID
 char* password = "23456789@";      // Password
String host = "192.168.1.79";  // IP serveur - Server IP
const int   port = 3000;            // Port serveur - Server Port
const int   watchdog = 5000;        // Fréquence du watchdog - Watchdog frequency
unsigned long previousMillis = millis(); 
 WiFiClient client;
 SocketIOClient socket;
void setup() {
  Serial.begin(115200);
  Serial.print("Connecting to ");
  Serial.println(ssid);
  
  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());
  if (!client.connect(host, port)) {
      Serial.println("connection failed");
     
    }
    else
    {
      Serial.println("CONNECT TO SERVER SUCCESSFULLY");
      
    }
}

void loop() {
   
     // Read all the lines of the reply from server and print them to Serial
   
   if(!socket.connect(host,port))
      {
        Serial.println("socket failed");
        
      }
      else
      {
        Serial.println("Socket ON");
      }
      if(!socket.connected())
      {
        socket.reconnect(host,port);
      }
    }
    
    

但是从串口报道回复给我： Socket failure

由于我是ESP8266的新手，所以任何人都可以帮我这个或者你能提供一些示例代码吗？ 如果你能提供帮助，我真的很感激。