Async_ESP32_FSWebServer.ino

/****************************************************************************************************************************
  Async_ESP32_FSWebServer - Example WebServer with SPIFFS backend for ESP32
  For Ethernet shields using ESP32_Ethernet (ESP32 + LwIP W5500 / ENC28J60)

  Modified from
  1. Tzapu               (https://github.com/tzapu/WiFiManager)
  2. Ken Taylor          (https://github.com/kentaylor)
  3. Alan Steremberg     (https://github.com/alanswx/ESPAsyncWiFiManager)
  4. Khoi Hoang          (https://github.com/khoih-prog/ESPAsync_WiFiManager)

  Built by Khoi Hoang https://github.com/khoih-prog/AsyncESP32_Ethernet_Manager
  Licensed under MIT license
 *****************************************************************************************************************************/
/*****************************************************************************************************************************
   Compare this efficient Async_ESP32_FSWebServer_DRD example with the so complicated twin ESP32_FSWebServer
   in (https://github.com/khoih-prog/ESP_WiFiManager) to appreciate the powerful AsynWebServer.

   How To Upload Files:
   1) Go to http://async-esp32fs.local/edit, then "Choose file" -> "Upload"
   2) or Upload the contents of the data folder with MkSPIFFS Tool ("ESP8266 Sketch Data Upload" in Tools menu in Arduino IDE)
   3) or you can upload the contents of a folder if you CD in that folder and run the following command:
      for file in `\ls -A1`; do curl -F "file=@$PWD/$file" esp8266fs.local/edit; done

   How To Use:
   1) access the sample web page at http://async-esp32fs.local
   2) edit the page by going to http://async-esp32fs.local/edit
   3) Use configurable user/password to login. Default is admin/admin
*****************************************************************************************************************************/

#if !( defined(ESP32) )
  #error This code is intended to run on the (ESP32 + LwIP W5500 or ENC28J60) platform! Please check your Tools->Board setting.
#endif

#define USING_W5500           true
#define USING_ENC28J60        false

#if !USING_W5500 && !USING_ENC28J60
  #undef USING_W5500
  #define USING_W5500           true
#endif

//////////////////////////////////////////////////////////////

// Use from 0 to 4. Higher number, more debugging messages and memory usage.
#define _ESPASYNC_ETH_MGR_LOGLEVEL_    4

// To not display stored SSIDs and PWDs on Config Portal, select false. Default is true
// Even the stored Credentials are not display, just leave them all blank to reconnect and reuse the stored Credentials
//#define DISPLAY_STORED_CREDENTIALS_IN_CP        false

//////////////////////////////////////////////////////////////

// Enter a MAC address and IP address for your controller below.
#define NUMBER_OF_MAC      20

byte mac[][NUMBER_OF_MAC] =
{
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x01 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x02 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x03 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x04 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x05 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x06 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x07 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x08 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x09 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x0A },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x0B },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x0C },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x0D },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x0E },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x0F },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x10 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x11 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x12 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x13 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x14 },
};

//////////////////////////////////////////////////////////

#if USING_W5500

// For W5500
// Optional values to override default settings
// Don't change unless you know what you're doing
//#define ETH_SPI_HOST        SPI3_HOST
//#define SPI_CLOCK_MHZ       25

// Must connect INT to GPIOxx or not working
//#define INT_GPIO            4

//#define MISO_GPIO           19
//#define MOSI_GPIO           23
//#define SCK_GPIO            18
//#define CS_GPIO             5

//////////////////////////////////////////////////////////

#else   // #if USING_W5500

//////////////////////////////////////////////////////////

// For ENC28J60
// Optional values to override default settings
// Don't change unless you know what you're doing
// Optional values to override default settings
//#define SPI_HOST            1
//#define SPI_CLOCK_MHZ       8

// Must connect INT to GPIOxx or not working
//#define INT_GPIO            4

//#define MISO_GPIO           19
//#define MOSI_GPIO           23
//#define SCK_GPIO            18
//#define CS_GPIO             5

//////////////////////////////////////////////////////////

#endif    // #if USING_W5500


//////////////////////////////////////////////////////////////

#include <ESPmDNS.h>

//////////////////////////////////////////////////////////////

// You only need to format the filesystem once
//#define FORMAT_FILESYSTEM       true
#define FORMAT_FILESYSTEM         false

//////////////////////////////////////////////////////////////

// LittleFS has higher priority than SPIFFS
#if ( defined(ESP_ARDUINO_VERSION_MAJOR) && (ESP_ARDUINO_VERSION_MAJOR >= 2) )
  #define USE_LITTLEFS    true
  #define USE_SPIFFS      false
#elif defined(ARDUINO_ESP32C3_DEV)
  // For core v1.0.6-, ESP32-C3 only supporting SPIFFS and EEPROM. To use v2.0.0+ for LittleFS
  #define USE_LITTLEFS          false
  #define USE_SPIFFS            true
#endif

#if USE_LITTLEFS
  // Use LittleFS
  #include "FS.h"

  // Check cores/esp32/esp_arduino_version.h and cores/esp32/core_version.h
  //#if ( ESP_ARDUINO_VERSION >= ESP_ARDUINO_VERSION_VAL(2, 0, 0) )  //(ESP_ARDUINO_VERSION_MAJOR >= 2)
  #if ( defined(ESP_ARDUINO_VERSION_MAJOR) && (ESP_ARDUINO_VERSION_MAJOR >= 2) )
    #if (_ESPASYNC_ETH_MGR_LOGLEVEL_ > 3)
      #warning Using ESP32 Core 1.0.6 or 2.0.0+
    #endif

    // The library has been merged into esp32 core from release 1.0.6
    #include <LittleFS.h>       // https://github.com/espressif/arduino-esp32/tree/master/libraries/LittleFS

    FS* filesystem =      &LittleFS;
    #define FileFS        LittleFS
    #define FS_Name       "LittleFS"
  #else
    #if (_ESPASYNC_ETH_MGR_LOGLEVEL_ > 3)
      #warning Using ESP32 Core 1.0.5-. You must install LITTLEFS library
    #endif

    // The library has been merged into esp32 core from release 1.0.6
    #include <LITTLEFS.h>       // https://github.com/lorol/LITTLEFS

    FS* filesystem =      &LITTLEFS;
    #define FileFS        LITTLEFS
    #define FS_Name       "LittleFS"
  #endif

#elif USE_SPIFFS
  #include <SPIFFS.h>
  FS* filesystem =      &SPIFFS;
  #define FileFS        SPIFFS
  #define FS_Name       "SPIFFS"
#else
  // Use FFat
  #include <FFat.h>
  FS* filesystem =      &FFat;
  #define FileFS        FFat
  #define FS_Name       "FFat"
#endif

#define LED_BUILTIN       2
#define LED_ON            HIGH
#define LED_OFF           LOW

#include <SPIFFSEditor.h>

//////////////////////////////////////////////////////////////

// Assuming max 49 chars
#define TZNAME_MAX_LEN            50
#define TIMEZONE_MAX_LEN          50

typedef struct
{
  char TZ_Name[TZNAME_MAX_LEN];     // "America/Toronto"
  char TZ[TIMEZONE_MAX_LEN];        // "EST5EDT,M3.2.0,M11.1.0"
  uint16_t checksum;
} EthConfig;

EthConfig         Ethconfig;

//////////////////////////////////////////////////////////////

#define  CONFIG_FILENAME              F("/eth_cred.dat")

//////////////////////////////////////////////////////////////

// Indicates whether ESP has credentials saved from previous session, or double reset detected
bool initialConfig = false;

// Use false if you don't like to display Available Pages in Information Page of Config Portal
// Comment out or use true to display Available Pages in Information Page of Config Portal
// Must be placed before #include <AsyncESP32_Ethernet_Manager.h>
#define USE_AVAILABLE_PAGES     false

// From v1.0.10 to permit disable/enable StaticIP configuration in Config Portal from sketch. Valid only if DHCP is used.
// You'll loose the feature of dynamically changing from DHCP to static IP, or vice versa
// You have to explicitly specify false to disable the feature.
//#define USE_STATIC_IP_CONFIG_IN_CP          false

// Use false to disable NTP config. Advisable when using Cellphone, Tablet to access Config Portal.
// See Issue 23: On Android phone ConfigPortal is unresponsive (https://github.com/khoih-prog/ESP_WiFiManager/issues/23)
#define USE_ESP_ETH_MANAGER_NTP     false

// Just use enough to save memory. On ESP8266, can cause blank ConfigPortal screen
// if using too much memory
#define USING_AFRICA        false
#define USING_AMERICA       true
#define USING_ANTARCTICA    false
#define USING_ASIA          false
#define USING_ATLANTIC      false
#define USING_AUSTRALIA     false
#define USING_EUROPE        false
#define USING_INDIAN        false
#define USING_PACIFIC       false
#define USING_ETC_GMT       false

// Use true to enable CloudFlare NTP service. System can hang if you don't have Internet access while accessing CloudFlare
// See Issue #21: CloudFlare link in the default portal (https://github.com/khoih-prog/ESP_WiFiManager/issues/21)
#define USE_CLOUDFLARE_NTP          false

#define USING_CORS_FEATURE          true

//////////////////////////////////////////////////////////////

// Use USE_DHCP_IP == true for dynamic DHCP IP, false to use static IP which you have to change accordingly to your network
#if (defined(USE_STATIC_IP_CONFIG_IN_CP) && !USE_STATIC_IP_CONFIG_IN_CP)
  // Force DHCP to be true
  #if defined(USE_DHCP_IP)
    #undef USE_DHCP_IP
  #endif
  #define USE_DHCP_IP     true
#else
  // You can select DHCP or Static IP here
  //#define USE_DHCP_IP     true
  #define USE_DHCP_IP     false
#endif

#if ( USE_DHCP_IP )
  // Use DHCP

  #if (_ESPASYNC_ETH_MGR_LOGLEVEL_ > 3)
    #warning Using DHCP IP
  #endif

  IPAddress stationIP   = IPAddress(0, 0, 0, 0);
  IPAddress gatewayIP   = IPAddress(192, 168, 2, 1);
  IPAddress netMask     = IPAddress(255, 255, 255, 0);

#else
  // Use static IP

  #if (_ESPASYNC_ETH_MGR_LOGLEVEL_ > 3)
    #warning Using static IP
  #endif

  IPAddress stationIP   = IPAddress(192, 168, 2, 232);
  IPAddress gatewayIP   = IPAddress(192, 168, 2, 1);
  IPAddress netMask     = IPAddress(255, 255, 255, 0);
#endif

//////////////////////////////////////////////////////////////

#define USE_CONFIGURABLE_DNS      true

IPAddress dns1IP      = gatewayIP;
IPAddress dns2IP      = IPAddress(8, 8, 8, 8);

//////////////////////////////////////////////////////////////

// To eliminate WebServer.h conflicts when using AsyncWebServer
#define WEBSERVER_H

#include <AsyncESP32_Ethernet_Manager.h>               //https://github.com/khoih-prog/AsyncESP32_Ethernet_Manager

String host = "async-esp32fs";

#define HTTP_PORT     80

AsyncWebServer server(HTTP_PORT);
//AsyncDNSServer dnsServer;

AsyncEventSource events("/events");

String http_username = "admin";
String http_password = "admin";

String separatorLine = "===============================================================";

//////////////////////////////////////////////////////////////

/******************************************
   // Defined in AsyncESP32_Ethernet_Manager.hpp
  typedef struct
  {
    IPAddress _sta_static_ip;
    IPAddress _sta_static_gw;
    IPAddress _sta_static_sn;
    #if USE_CONFIGURABLE_DNS
    IPAddress _sta_static_dns1;
    IPAddress _sta_static_dns2;
    #endif
  }  ETH_STA_IPConfig;
******************************************/

ETH_STA_IPConfig EthSTA_IPconfig;

//////////////////////////////////////////////////////////////

void initSTAIPConfigStruct(ETH_STA_IPConfig &in_EthSTA_IPconfig)
{
  in_EthSTA_IPconfig._sta_static_ip   = stationIP;
  in_EthSTA_IPconfig._sta_static_gw   = gatewayIP;
  in_EthSTA_IPconfig._sta_static_sn   = netMask;
#if USE_CONFIGURABLE_DNS
  in_EthSTA_IPconfig._sta_static_dns1 = dns1IP;
  in_EthSTA_IPconfig._sta_static_dns2 = dns2IP;
#endif
}

//////////////////////////////////////////////////////////////

void displayIPConfigStruct(ETH_STA_IPConfig in_EthSTA_IPconfig)
{
  LOGERROR3(F("stationIP ="), in_EthSTA_IPconfig._sta_static_ip, ", gatewayIP =", in_EthSTA_IPconfig._sta_static_gw);
  LOGERROR1(F("netMask ="), in_EthSTA_IPconfig._sta_static_sn);
#if USE_CONFIGURABLE_DNS
  LOGERROR3(F("dns1IP ="), in_EthSTA_IPconfig._sta_static_dns1, ", dns2IP =", in_EthSTA_IPconfig._sta_static_dns2);
#endif
}

//////////////////////////////////////////////////////////////

//format bytes
String formatBytes(size_t bytes)
{
  if (bytes < 1024)
  {
    return String(bytes) + "B";
  }
  else if (bytes < (1024 * 1024))
  {
    return String(bytes / 1024.0) + "KB";
  }
  else if (bytes < (1024 * 1024 * 1024))
  {
    return String(bytes / 1024.0 / 1024.0) + "MB";
  }
  else
  {
    return String(bytes / 1024.0 / 1024.0 / 1024.0) + "GB";
  }
}

//////////////////////////////////////////////////////////////

void toggleLED()
{
  //toggle state
  digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN));
}

//////////////////////////////////////////////////////////////

#if USE_ESP_ETH_MANAGER_NTP
void printLocalTime()
{
  struct tm timeinfo;

  getLocalTime( &timeinfo );

  // Valid only if year > 2000.
  // You can get from timeinfo : tm_year, tm_mon, tm_mday, tm_hour, tm_min, tm_sec
  if (timeinfo.tm_year > 100 )
  {
    Serial.print("Local Date/Time: ");
    Serial.print( asctime( &timeinfo ) );
  }
}
#endif

//////////////////////////////////////////////////////////////

void heartBeatPrint()
{
#if USE_ESP_ETH_MANAGER_NTP
  printLocalTime();
#else
  static int num = 1;

#if USING_W5500
  if (ESP32_W5500_isConnected())
#else
  if (ESP32_ENC_isConnected())
#endif
    Serial.print(F("H"));        // H means connected to Ethernet
  else
    Serial.print(F("F"));        // F means not connected to Ethernet

  if (num == 80)
  {
    Serial.println();
    num = 1;
  }
  else if (num++ % 10 == 0)
  {
    Serial.print(F(" "));
  }

#endif
}

//////////////////////////////////////////////////////////////

void check_status()
{
  static ulong checkstatus_timeout  = 0;
  static ulong LEDstatus_timeout    = 0;

  static ulong current_millis;

#if USE_ESP_ETH_MANAGER_NTP
#define HEARTBEAT_INTERVAL    60000L
#else
#define HEARTBEAT_INTERVAL    10000L
#endif

#define LED_INTERVAL          2000L

  current_millis = millis();

  if ((current_millis > LEDstatus_timeout) || (LEDstatus_timeout == 0))
  {
    // Toggle LED at LED_INTERVAL = 2s
    toggleLED();
    LEDstatus_timeout = current_millis + LED_INTERVAL;
  }

  // Print hearbeat every HEARTBEAT_INTERVAL (10) seconds.
  if ((current_millis > checkstatus_timeout) || (checkstatus_timeout == 0))
  {
    heartBeatPrint();
    checkstatus_timeout = current_millis + HEARTBEAT_INTERVAL;
  }
}

//////////////////////////////////////////////////////////////

int calcChecksum(uint8_t* address, uint16_t sizeToCalc)
{
  uint16_t checkSum = 0;

  for (uint16_t index = 0; index < sizeToCalc; index++)
  {
    checkSum += * ( ( (byte*) address ) + index);
  }

  return checkSum;
}

//////////////////////////////////////////////////////////////

bool loadConfigData()
{
  File file = FileFS.open(CONFIG_FILENAME, "r");
  LOGERROR(F("LoadCfgFile "));

  memset((void *) &Ethconfig,       0, sizeof(Ethconfig));
  memset((void *) &EthSTA_IPconfig, 0, sizeof(EthSTA_IPconfig));

  if (file)
  {
    file.readBytes((char *) &Ethconfig,   sizeof(Ethconfig));
    file.readBytes((char *) &EthSTA_IPconfig, sizeof(EthSTA_IPconfig));
    file.close();

    LOGERROR(F("OK"));

    if ( Ethconfig.checksum != calcChecksum( (uint8_t*) &Ethconfig, sizeof(Ethconfig) - sizeof(Ethconfig.checksum) ) )
    {
      LOGERROR(F("Ethconfig checksum wrong"));

      return false;
    }

    displayIPConfigStruct(EthSTA_IPconfig);

    return true;
  }
  else
  {
    LOGERROR(F("failed"));

    return false;
  }
}

//////////////////////////////////////////////////////////////

void saveConfigData()
{
  File file = FileFS.open(CONFIG_FILENAME, "w");
  LOGERROR(F("SaveCfgFile "));

  if (file)
  {
    Ethconfig.checksum = calcChecksum( (uint8_t*) &Ethconfig, sizeof(Ethconfig) - sizeof(Ethconfig.checksum) );

    file.write((uint8_t*) &Ethconfig, sizeof(Ethconfig));

    displayIPConfigStruct(EthSTA_IPconfig);

    file.write((uint8_t*) &EthSTA_IPconfig, sizeof(EthSTA_IPconfig));
    file.close();

    LOGERROR(F("OK"));
  }
  else
  {
    LOGERROR(F("failed"));
  }
}

//////////////////////////////////////////////////////////////

#if USING_W5500

void beginEthernet()
{
  LOGWARN(F("Default SPI pinout:"));
  LOGWARN1(F("SPI_HOST:"), ETH_SPI_HOST);
  LOGWARN1(F("MOSI:"), MOSI_GPIO);
  LOGWARN1(F("MISO:"), MISO_GPIO);
  LOGWARN1(F("SCK:"),  SCK_GPIO);
  LOGWARN1(F("CS:"),   CS_GPIO);
  LOGWARN1(F("INT:"),  INT_GPIO);
  LOGWARN1(F("SPI Clock (MHz):"), SPI_CLOCK_MHZ);
  LOGWARN(F("========================="));

  ///////////////////////////////////

  // To be called before ETH.begin()
  ESP32_W5500_onEvent();

  // start the ethernet connection and the server:
  // Use DHCP dynamic IP and random mac
  uint16_t index = millis() % NUMBER_OF_MAC;

  //bool begin(int MISO_GPIO, int MOSI_GPIO, int SCLK_GPIO, int CS_GPIO, int INT_GPIO, int SPI_CLOCK_MHZ,
  //           int SPI_HOST, uint8_t *W5500_Mac = W5500_Default_Mac);
  //ETH.begin( MISO_GPIO, MOSI_GPIO, SCK_GPIO, CS_GPIO, INT_GPIO, SPI_CLOCK_MHZ, ETH_SPI_HOST );
  ETH.begin( MISO_GPIO, MOSI_GPIO, SCK_GPIO, CS_GPIO, INT_GPIO, SPI_CLOCK_MHZ, ETH_SPI_HOST, mac[index] );
}

void initEthernet()
{
#if !( USE_DHCP_IP )
  displayIPConfigStruct(EthSTA_IPconfig);

  // Static IP, leave without this line to get IP via DHCP
  //bool config(IPAddress local_ip, IPAddress gateway, IPAddress subnet, IPAddress dns1 = 0, IPAddress dns2 = 0);
  //ETH.config(stationIP, gatewayIP, netMask, dns1IP, dns2IP);
  ETH.config(EthSTA_IPconfig._sta_static_ip, EthSTA_IPconfig._sta_static_gw, EthSTA_IPconfig._sta_static_sn,
             EthSTA_IPconfig._sta_static_dns1);
#endif

  ESP32_W5500_waitForConnect();
}

#else

void beginEthernet()
{
  LOGWARN(F("Default SPI pinout:"));
  LOGWARN1(F("MOSI:"), MOSI_GPIO);
  LOGWARN1(F("MISO:"), MISO_GPIO);
  LOGWARN1(F("SCK:"),  SCK_GPIO);
  LOGWARN1(F("CS:"),   CS_GPIO);
  LOGWARN1(F("INT:"),  INT_GPIO);
  LOGWARN1(F("SPI Clock (MHz):"), SPI_CLOCK_MHZ);
  LOGWARN(F("========================="));

  ///////////////////////////////////

  // To be called before ETH.begin()
  ESP32_ENC_onEvent();

  // start the ethernet connection and the server:
  // Use DHCP dynamic IP and random mac
  uint16_t index = millis() % NUMBER_OF_MAC;

  //bool begin(int MISO_GPIO, int MOSI_GPIO, int SCLK_GPIO, int CS_GPIO, int INT_GPIO, int SPI_CLOCK_MHZ,
  //           int SPI_HOST, uint8_t *ENC28J60_Mac = ENC28J60_Default_Mac);
  //ETH.begin( MISO_GPIO, MOSI_GPIO, SCK_GPIO, CS_GPIO, INT_GPIO, SPI_CLOCK_MHZ, SPI_HOST );
  ETH.begin( MISO_GPIO, MOSI_GPIO, SCK_GPIO, CS_GPIO, INT_GPIO, SPI_CLOCK_MHZ, SPI_HOST, mac[index] );
}

void initEthernet()
{
#if !( USE_DHCP_IP )
  displayIPConfigStruct(EthSTA_IPconfig);

  // Static IP, leave without this line to get IP via DHCP
  //bool config(IPAddress local_ip, IPAddress gateway, IPAddress subnet, IPAddress dns1 = 0, IPAddress dns2 = 0);
  //ETH.config(stationIP, gatewayIP, netMask, dns1IP, dns2IP);
  ETH.config(EthSTA_IPconfig._sta_static_ip, EthSTA_IPconfig._sta_static_gw, EthSTA_IPconfig._sta_static_sn,
             EthSTA_IPconfig._sta_static_dns1);
#endif

  ESP32_ENC_waitForConnect();
}

#endif

//////////////////////////////////////////////////////////////

void setup()
{
  //set led pin as output
  pinMode(LED_BUILTIN, OUTPUT);

  Serial.begin(115200);

  while (!Serial && millis() < 5000);

  delay(200);

  Serial.print(F("\nStarting Async_ESP32_FSWebServer using "));
  Serial.print(FS_Name);
  Serial.print(F(" on "));
  Serial.print(ARDUINO_BOARD);
  Serial.print(F(" with "));
  Serial.println(SHIELD_TYPE);
  Serial.println(ASYNC_ESP32_ETH_MANAGER_VERSION);

  Serial.setDebugOutput(false);

  if (FORMAT_FILESYSTEM)
    FileFS.format();

  // Format FileFS if not yet
  if (!FileFS.begin(true))
  {
    Serial.println(F("SPIFFS/LittleFS failed! Already tried formatting."));

    if (!FileFS.begin())
    {
      // prevents debug info from the library to hide err message.
      delay(100);

#if USE_LITTLEFS
      Serial.println(F("LittleFS failed!. Please use SPIFFS or EEPROM. Stay forever"));
#else
      Serial.println(F("SPIFFS failed!. Please use LittleFS or EEPROM. Stay forever"));
#endif

      while (true)
      {
        delay(1);
      }
    }
  }

  File root = FileFS.open("/");
  File file = root.openNextFile();

  while (file)
  {
    String fileName = file.name();
    size_t fileSize = file.size();
    Serial.printf("FS File: %s, size: %s\n", fileName.c_str(), formatBytes(fileSize).c_str());
    file = root.openNextFile();
  }

  Serial.println();

  unsigned long startedAt = millis();

  beginEthernet();

  initSTAIPConfigStruct(EthSTA_IPconfig);

  digitalWrite(LED_BUILTIN, LED_ON);

  //Local intialization. Once its business is done, there is no need to keep it around
  // Use this to default DHCP hostname to ESP32-XXXXXX
  //AsyncESP32_Ethernet_Manager AsyncESP32_Ethernet_manager(&webServer, &dnsServer);
  // Use this to personalize DHCP hostname (RFC952 conformed)
#if ( USING_ESP32_S2 || USING_ESP32_C3 )
  AsyncESP32_Ethernet_Manager AsyncESP32_Ethernet_manager(&server, NULL, "AsyncESP32-FSWebServer");
#else
  AsyncDNSServer dnsServer;

  AsyncESP32_Ethernet_Manager AsyncESP32_Ethernet_manager(&server, &dnsServer, "AsyncESP32-FSWebServer");
#endif

#if !USE_DHCP_IP
  // Set (static IP, Gateway, Subnetmask, DNS1 and DNS2) or (IP, Gateway, Subnetmask)
  AsyncESP32_Ethernet_manager.setSTAStaticIPConfig(EthSTA_IPconfig);
#endif

#if USING_CORS_FEATURE
  AsyncESP32_Ethernet_manager.setCORSHeader("Your Access-Control-Allow-Origin");
#endif

  bool configDataLoaded = loadConfigData();

  //////////////////////////////////

  // Connect ETH now if using STA
  initEthernet();

  //////////////////////////////////

  if (configDataLoaded)
  {
#if USE_ESP_ETH_MANAGER_NTP

    if ( strlen(Ethconfig.TZ_Name) > 0 )
    {
      LOGERROR3(F("Saving current TZ_Name ="), Ethconfig.TZ_Name, F(", TZ = "), Ethconfig.TZ);

      //configTzTime(Ethconfig.TZ, "pool.ntp.org" );
      configTzTime(Ethconfig.TZ, "time.nist.gov", "0.pool.ntp.org", "1.pool.ntp.org");
    }
    else
    {
      Serial.println(F("Current Timezone is not set. Enter Config Portal to set."));
    }

#endif
  }
  else
  {
    // From v1.1.0, Don't permit NULL password
    //if ( (Router_SSID == "") || (Router_Pass == "") )
    {
      Serial.println(F("We haven't got any access point credentials, so get them now"));

      initialConfig = true;

      Serial.print(F("Starting configuration portal @ "));
      Serial.println(ETH.localIP());

      //sets timeout in seconds until configuration portal gets turned off.
      //If not specified device will remain in configuration mode until
      //switched off via webserver or device is restarted.
      //AsyncESP32_Ethernet_manager.setConfigPortalTimeout(600);

      // Starts an access point
      if (!AsyncESP32_Ethernet_manager.startConfigPortal())
        Serial.println(F("Not connected to ETH network but continuing anyway."));
      else
      {
        Serial.println(F("ETH network connected...yeey :)"));
      }

#if USE_ESP_ETH_MANAGER_NTP
      String tempTZ   = AsyncESP32_Ethernet_manager.getTimezoneName();

      if (strlen(tempTZ.c_str()) < sizeof(Ethconfig.TZ_Name) - 1)
        strcpy(Ethconfig.TZ_Name, tempTZ.c_str());
      else
        strncpy(Ethconfig.TZ_Name, tempTZ.c_str(), sizeof(Ethconfig.TZ_Name) - 1);

      const char * TZ_Result = AsyncESP32_Ethernet_manager.getTZ(Ethconfig.TZ_Name);

      if (strlen(TZ_Result) < sizeof(Ethconfig.TZ) - 1)
        strcpy(Ethconfig.TZ, TZ_Result);
      else
        strncpy(Ethconfig.TZ, TZ_Result, sizeof(Ethconfig.TZ_Name) - 1);

      if ( strlen(Ethconfig.TZ_Name) > 0 )
      {
        LOGERROR3(F("Saving current TZ_Name ="), Ethconfig.TZ_Name, F(", TZ = "), Ethconfig.TZ);

        //configTzTime(Ethconfig.TZ, "pool.ntp.org" );
        configTzTime(Ethconfig.TZ, "time.nist.gov", "0.pool.ntp.org", "1.pool.ntp.org");
      }
      else
      {
        LOGERROR(F("Current Timezone Name is not set. Enter Config Portal to set."));
      }

#endif

      AsyncESP32_Ethernet_manager.getSTAStaticIPConfig(EthSTA_IPconfig);

      saveConfigData();
    }
  }

  startedAt = millis();

  Serial.print(F("After waiting "));
  Serial.print((float) (millis() - startedAt) / 1000);
  Serial.print(F(" secs more in setup(), connection result is "));

#if USING_W5500
  if (ESP32_W5500_isConnected())
#else
  if (ESP32_ENC_isConnected())
#endif
  {
    Serial.print(F("connected. Local IP: "));
    Serial.println(ETH.localIP());
  }

  if ( !MDNS.begin(host.c_str()) )
  {
    Serial.println(F("Error starting MDNS responder!"));
  }

  // Add service to MDNS-SD
  MDNS.addService("http", "tcp", HTTP_PORT);

  //SERVER INIT
  events.onConnect([](AsyncEventSourceClient * client)
  {
    client->send("hello!", NULL, millis(), 1000);
  });

  server.addHandler(&events);

  server.on("/heap", HTTP_GET, [](AsyncWebServerRequest * request)
  {
    request->send(200, "text/plain", String(ESP.getFreeHeap()));
  });

  server.addHandler(new SPIFFSEditor(FileFS, http_username, http_password));
  server.serveStatic("/", FileFS, "/").setDefaultFile("index.htm");

  server.onNotFound([](AsyncWebServerRequest * request)
  {
    Serial.print(F("NOT_FOUND: "));

    if (request->method() == HTTP_GET)
      Serial.print(F("GET"));
    else if (request->method() == HTTP_POST)
      Serial.print(F("POST"));
    else if (request->method() == HTTP_DELETE)
      Serial.print(F("DELETE"));
    else if (request->method() == HTTP_PUT)
      Serial.print(F("PUT"));
    else if (request->method() == HTTP_PATCH)
      Serial.print(F("PATCH"));
    else if (request->method() == HTTP_HEAD)
      Serial.print(F("HEAD"));
    else if (request->method() == HTTP_OPTIONS)
      Serial.print(F("OPTIONS"));
    else
      Serial.print(F("UNKNOWN"));

    Serial.println(" http://" + request->host() + request->url());

    if (request->contentLength())
    {
      Serial.println("_CONTENT_TYPE: " + request->contentType());
      Serial.println("_CONTENT_LENGTH: " + request->contentLength());
    }

    int headers = request->headers();
    int i;

    for (i = 0; i < headers; i++)
    {
      AsyncWebHeader* h = request->getHeader(i);
      Serial.println("_HEADER[" + h->name() + "]: " + h->value());
    }

    int params = request->params();

    for (i = 0; i < params; i++)
    {
      AsyncWebParameter* p = request->getParam(i);

      if (p->isFile())
      {
        Serial.println("_FILE[" + p->name() + "]: " + p->value() + ", size: " + p->size());
      }
      else if (p->isPost())
      {
        Serial.println("_POST[" + p->name() + "]: " + p->value());
      }
      else
      {
        Serial.println("_GET[" + p->name() + "]: " + p->value());
      }
    }

    request->send(404);
  });

  server.onFileUpload([](AsyncWebServerRequest * request, const String & filename, size_t index, uint8_t *data,
                         size_t len, bool final)
  {
    (void) request;

    if (!index)
      Serial.println("UploadStart: " + filename);

    Serial.print((const char*)data);

    if (final)
      Serial.println("UploadEnd: " + filename + "(" + String(index + len) + ")" );
  });

  server.onRequestBody([](AsyncWebServerRequest * request, uint8_t *data, size_t len, size_t index, size_t total)
  {
    (void) request;

    if (!index)
      Serial.println("BodyStart: " + total);

    Serial.print((const char*)data);

    if (index + len == total)
      Serial.println("BodyEnd: " + total);
  });

  server.begin();

  //////////////////////////////////////////////////////////////

  Serial.print(F("HTTP server started @ "));
  Serial.println(ETH.localIP());

  Serial.println(separatorLine);
  Serial.print("Open http://");
  Serial.print(ETH.localIP());
  Serial.println("/edit to see the file browser");
  Serial.println("Using username = " + http_username + " and password = " + http_password);
  Serial.println(separatorLine);

  digitalWrite(LED_BUILTIN, LED_OFF);
}

//////////////////////////////////////////////////////////////

void loop()
{
  check_status();
}