各位大神好!最近嘗試用ESP32傳送資料到MySQL，但遇上解決不了的問題(附圖中)

我使用Arduino IDE編寫，當WiFi連接完成再來與MySQL連接卻卡住了，檢查WiFi、MySQL帳密都正確(在同一個區域網路中)，port也正常沒被擋，奇怪的是MySQL能看到有嘗試登入但失敗，有點像連線逾時?請教各路大神是否知道哪裡出問題，或者是否有人遇過類似狀況呢?
附上MySQL連接程式碼

#include <WiFi.h>
#include <MySQL_Connection.h>
#include <MySQL_Cursor.h>

const char* ssid = "";  //WIFI 名稱
const char* WIFI_password = "";  //WIFI 密碼

IPAddress server_addr( , , , ); // MySQL IP地址
unsigned int server_port = 3306;           // MySQLport
char user[] = "";                  // MySQL帳號
char password[] = "";              // MySQL密碼
char db[] = "";               // 數據庫

WiFiClient client;
MySQL_Connection conn((Client *)&client);

void setup() {
  Serial.begin(115200);
  delay(100);
  
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, WIFI_password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");

  Serial.println("Connecting to database...");
  if (conn.connect(server_addr, server_port, user, password, db)) {
    Serial.println("Connected to database");
    
    MySQL_Cursor *cur_mem = new MySQL_Cursor(&conn);
    char query[] = "SELECT * FROM your_table";
    cur_mem->execute(query);
    delete cur_mem;
  } else {
    Serial.println("Connection failed");
    Serial.println("Exiting program");
    while (true) {
      delay(1);
    }
  }
}

void loop() {
  delay(1000);
}