diff --git a/src/client/ESP_SSLClient.h b/src/client/ESP_SSLClient.h
deleted file mode 100644
index 6f44ea3..0000000
--- a/src/client/ESP_SSLClient.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/**
- *
- * The ESP SSL Client Class, ESP_SSLClient.h v2.0.6
- *
- * Created August 6, 2023
- *
- * The MIT License (MIT)
- * Copyright (c) 2023 K. Suwatchai (Mobizt)
- *
- *
- * Permission is hereby granted, free of charge, to any person returning a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
- * the Software, and to permit persons to whom the Software is furnished to do so,
- * subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
- * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
- * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-#ifndef ESP_SSLCLIENT_H
-#define ESP_SSLCLIENT_H
-
-#include "ESP_SSLClient_FS.h"
-
-#ifndef SSLCLIENT_CONNECTION_UPGRADABLE
-#define SSLCLIENT_CONNECTION_UPGRADABLE
-#endif
-
-#include "client/BSSL_TCP_Client.h"
-
-class ESP_SSLClient : public BSSL_TCP_Client
-{ 
-public:
-    ESP_SSLClient(){};
-    ~ESP_SSLClient(){};
-};
-
-#endif
\ No newline at end of file
diff --git a/src/client/ESP_SSLClient_Const.h b/src/client/ESP_SSLClient_Const.h
deleted file mode 100644
index 19711bc..0000000
--- a/src/client/ESP_SSLClient_Const.h
+++ /dev/null
@@ -1,124 +0,0 @@
-#ifndef ESP_SSLCLIENT_CONST_H
-#define ESP_SSLCLIENT_CONST_H
-
-#pragma GCC diagnostic ignored "-Wunused-function"
-#pragma GCC diagnostic ignored "-Wvla"
-
-#include "ESP_SSLClient_FS.h"
-
-#include <Arduino.h>
-#include <Client.h>
-
-#define ESP_SSLCLIENT_VALID_TIMESTAMP 1690979919
-
-#ifndef SSLCLIENT_CONNECTION_UPGRADABLE
-#define SSLCLIENT_CONNECTION_UPGRADABLE
-#endif
-
-#ifdef ESP_SSLCLIENT_ENABLE_DEBUG
-#if !defined(ESP_SSLCLIENT_DEBUG_PORT)
-#define ESP_SSLCLIENT_DEBUG_PORT Serial
-#endif
-#define ESP_SSLCLIENT_DEBUG_PRINT ESP_SSLCLIENT_DEBUG_PORT.print
-#else
-#define ESP_SSLCLIENT_DEBUG_PRINT(...)
-#endif
-
-enum esp_ssl_client_debug_level
-{
-    esp_ssl_debug_none = 0,
-    esp_ssl_debug_error = 1,
-    esp_ssl_debug_warn = 2,
-    esp_ssl_debug_info = 3,
-    esp_ssl_debug_dump = 4
-};
-
-enum esp_ssl_client_error_types
-{
-    esp_ssl_ok,
-    esp_ssl_connection_fail,
-    esp_ssl_write_error,
-    esp_ssl_read_error,
-    esp_ssl_out_of_memory,
-    esp_ssl_internal_error
-};
-
-#if defined(ESP_SSLCLIENT_ENABLE_DEBUG)
-
-static void esp_ssl_debug_print_prefix(const char *func_name, int level)
-{
-    ESP_SSLCLIENT_DEBUG_PRINT(PSTR("> "));
-    // print the debug level
-    switch (level)
-    {
-    case esp_ssl_debug_info:
-        ESP_SSLCLIENT_DEBUG_PRINT(PSTR("INFO."));
-        break;
-    case esp_ssl_debug_warn:
-        ESP_SSLCLIENT_DEBUG_PRINT(PSTR("WARN."));
-        break;
-    case esp_ssl_debug_error:
-        ESP_SSLCLIENT_DEBUG_PRINT(PSTR("ERROR."));
-        break;
-    default:
-        break;
-    }
-
-    // print the function name
-    ESP_SSLCLIENT_DEBUG_PRINT(PSTR(""));
-    ESP_SSLCLIENT_DEBUG_PRINT(func_name);
-    ESP_SSLCLIENT_DEBUG_PRINT(PSTR(": "));
-}
-
-static void esp_ssl_debug_print(PGM_P msg, int debug_level, int level, const char *func_name)
-{
-    if (debug_level >= level)
-    {
-        esp_ssl_debug_print_prefix(func_name, level);
-        ESP_SSLCLIENT_DEBUG_PRINT(msg);
-        ESP_SSLCLIENT_DEBUG_PRINT("\r\n");
-    }
-}
-
-#endif
-
-static uint8_t htoi(unsigned char c)
-{
-    if (c >= '0' && c <= '9')
-        return c - '0';
-    else if (c >= 'A' && c <= 'F')
-        return 10 + c - 'A';
-    else if (c >= 'a' && c <= 'f')
-        return 10 + c - 'a';
-    else
-        return 255;
-}
-
-// Helper function which aborts a TLS handshake by sending TLS
-// ClientAbort and ClientClose messages.
-static bool send_abort(Client *probe, bool supportsLen)
-{
-    // If we're still connected, send the appropriate notice that
-    // we're aborting the handshake per RFCs.
-    static const uint8_t clientAbort_P[] PROGMEM = {
-        0x15 /*alert*/, 0x03, 0x03 /*TLS 1.2*/, 0x00, 0x02,
-        1, 90 /* warning: user_cancelled */
-    };
-    static const uint8_t clientClose_P[] PROGMEM = {
-        0x15 /*alert*/, 0x03, 0x03 /*TLS 1.2*/, 0x00, 0x02,
-        1, 0 /* warning: close_notify */
-    };
-    if (probe->connected())
-    {
-        uint8_t msg[sizeof(clientAbort_P)];
-        memcpy_P(msg, clientAbort_P, sizeof(clientAbort_P));
-        probe->write(msg, sizeof(clientAbort_P));
-        memcpy_P(msg, clientClose_P, sizeof(clientClose_P));
-        probe->write(msg, sizeof(clientClose_P));
-    }
-    return supportsLen;
-}
-
-const uint16_t _secure_ports[26] = {443 /* HTTPS */, 465 /* SMTP */, 563 /* NNTP */, 636 /* LDAPS */, 695 /* IEEE-MMS-SSL */, 832 /* NETCONF */, 853 /* DNS */, 989 /* FTPS */, 990 /* FTPS */, 992 /* Telnet */, 993 /* IMAP */, 995 /* POP3 */, 4116 /* Smartcard */, 4843 /* OPC */, 5061 /* SIP */, 5085 /* LLIP */, 5349 /* NAT */, 5671 /* AMQP */, 5986 /* WinRM-HTTPS */, 6513 /* NETCONF */, 6514 /* Syslog */, 6515 /* Elipse RPC */, 6619 /* OFTP */, 8243 /* Apache Synapse */, 8403 /* GxFWD */, 8883 /* MQTT */};
-
-#endif
\ No newline at end of file
diff --git a/src/client/ESP_SSLClient_FS.h b/src/client/ESP_SSLClient_FS.h
deleted file mode 100644
index a7f5509..0000000
--- a/src/client/ESP_SSLClient_FS.h
+++ /dev/null
@@ -1,39 +0,0 @@
-#ifndef ESP_SSLClient_FS_H
-#define ESP_SSLClient_FS_H
-
-#if (defined(ESP8266) || defined(ARDUINO_ARCH_RP2040)) && !defined(ARDUINO_NANO_RP2040_CONNECT)
-// for ESP8266 and Raspberry Pi Pico (RP2040) only except for Arduino Nano RP2040 Connect 
-#define USE_EMBED_SSL_ENGINE
-#else
-#define USE_LIB_SSL_ENGINE
-#endif
-
-#pragma once
-
-// for enable debugging
-#define ESP_SSLCLIENT_ENABLE_DEBUG
-
-/** Call ssl_client.setDebugLevel(x) to set the debug
- * esp_ssl_debug_none = 0
- * esp_ssl_debug_error = 1
- * esp_ssl_debug_warn = 2
- * esp_ssl_debug_info = 3
- * esp_ssl_debug_dump = 4
- */
-
-// for debug port
-#define ESP_SSLCLIENT_DEBUG_PORT Serial
-
-// for SSL Error String
-#define ESP_SSLCLIENT_ENABLE_SSL_ERROR_STRING
-
-// for Filesystem support that required for CertStore
-#define ESP_SSLCLIENT_USE_FILESYSTEM
-
-#if defined __has_include
-#if __has_include(<Custom_ESP_SSLClient_FS.h>)
-#include "Custom_ESP_SSLClient_FS"
-#endif
-#endif
-
-#endif
\ No newline at end of file