arduino连接WiFi8266

在arduino上的代码验证过程中，出现了超时的问题，怎么解决？
. Variables and constants in RAM (global, static), used 28708 / 80192 bytes (35%)
║ SEGMENT BYTES DESCRIPTION
╠══ DATA 1496 initialized variables
╠══ RODATA 1364 constants
╚══ BSS 25848 zeroed variables
. Instruction RAM (IRAM_ATTR, ICACHE_RAM_ATTR), used 59747 / 65536 bytes (91%)
║ SEGMENT BYTES DESCRIPTION
╠══ ICACHE 32768 reserved space for flash instruction cache
╚══ IRAM 26979 code in IRAM
. Code in flash (default, ICACHE_FLASH_ATTR), used 249012 / 1048576 bytes (23%)
║ SEGMENT BYTES DESCRIPTION
╚══ IROM 249012 code in flash

首先给的这个段信息并不是一条报错信息，而是编译器输出的程序内存使用情况的信息 ,
我建议你,优化一下你的代码结构 , 更好的利用内存 .
分析与创作都不易,给个采纳吧!!

这是具体代码，

#include <ESP8266WiFi.h>
/* 依赖 PubSubClient 2.4.0 */
#include <PubSubClient.h>
 
/* 连接您的WIFI SSID和密码 */
#define WIFI_SSID         " "
#define WIFI_PASSWD       " "
 
/* 线上环境域名和端口号 */
#define MQTT_SERVER       " "
#define MQTT_PORT         1883//端口号
#define MQTT_USRNAME      " "
#define CLIENT_ID         " "
#define MQTT_PASSWD       " "
 
//发布消息用的topic
#define PubTopic "你的topic"
 
unsigned long lastMs = 0;
WiFiClient espClient;
PubSubClient  client(espClient);
 
//收到消息后的回调函数
void callback(char *topic, byte *payload, unsigned int length)
{
  Serial.print("Message arrived [");
  Serial.print(topic);
  Serial.print("] ");
  payload[length] = '\0';
  Serial.println((char *)payload);
 
}
 
//wifi初始化
void wifiInit()
{
  WiFi.mode(WIFI_STA);
  WiFi.begin(WIFI_SSID, WIFI_PASSWD);
  while (WiFi.status() != WL_CONNECTED)
  {
    delay(1000);
    Serial.println("WiFi not Connect");
  }
 
  Serial.println("Connected to AP");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
 
  Serial.print("espClient [");
 
  client.setServer(MQTT_SERVER, MQTT_PORT);   /* 连接WiFi之后，连接MQTT服务器 */
  client.setCallback(callback);
}
 
//发布一个字符串的消息
void pubMsg(char const *msg)
{
    boolean d = client.publish(PubTopic, msg);
    if(d){
      Serial.println("publish success"); 
    }else{
      Serial.println("publish fail"); 
    }
}
 
//发布指定长度的字符消息
void pubMsgLen(uint8_t *msg,int len)
{
    boolean d = client.publish(PubTopic,msg,len);
    if(d){
      Serial.println("publish success"); 
    }else{
      Serial.println("publish fail"); 
    } 
}
 
//连接到服务器
void mqttCheckConnect()
{
  while (!client.connected())
  {
    Serial.println("Connecting to MQTT Server ...");
    if (client.connect(CLIENT_ID, MQTT_USRNAME, MQTT_PASSWD))
 
    {
 
      Serial.println("MQTT Connected!");
 
    }
    else
    {
      Serial.print("MQTT Connect err:");
      Serial.println(client.state());
      delay(5000);
    }
  }
}
 
void setup()
{
/* initialize serial for debugging */
    Serial.begin(115200); //开启串口
    Serial.println("Demo Start");
    wifiInit();//连接wifi
    unsigned char i=0;
    mqttCheckConnect();//连接阿里云
    pubMsg("hello");
}
 
// the loop function runs over and over again forever
void loop()
{
  client.loop();//保持客户端的连接
}