buf(new char[size + 1]);
+```
+
+**Remember always add 1 to the buffer length to store the terminating `0`.**
+
+
+Then just read the file into the buffer, and close the file to be safe
+
+```cpp
+// Read and store file contents in buf
+f.readBytes(buf.get(), size);
+// Closing file
+f.close();
+```
+
+### 6.3 Populate the just-read Jsonified data into the DynamicJsonDocument json object
+
+We again use the same `DynamicJsonDocument json` object to store the data we've just read from `CONFIG_FILE`.
+
+Why the same complicated `DynamicJsonDocument json` object ?? Because in steps 5, we did store `Jsonified data` using the same `DynamicJsonDocument json` object. It's much easier we now use it again to facilitate the parsing of `Jsonified data` back to the data we can use easily.
+
+
+We first create the object with enough size
+
+```cpp
+DynamicJsonDocument json(1024);
+```
+
+then populate it with data from buffer we read from `CONFIG_FILE` in step 6.2, pre-parse and check for error. All is done just by one command `deserializeJson()`
+
+```cpp
+auto deserializeError = deserializeJson(json, buf.get());
+```
+
+Abort if there is any data error in the process of writing, storing, reading back. If OK, just nicely print out to the Debug Terminal
+
+```cpp
+if ( deserializeError )
+{
+ Serial.println("JSON parseObject() failed");
+ return false;
+}
+
+serializeJson(json, Serial);
+```
+
+### 6.4 Parse the Jsonified data from the DynamicJsonDocument json object to store into corresponding parameters
+
+
+This is as simple as in the step 5.2, but in reverse direction.
+
+To be sure there is good corresponding data, not garbage, for each variable, we have to perform **sanity checks** by
+verifying the `DynamicJsonDocument json object` still contains the correct keys we passed to it when we wrote into `CONFIG_FILE`.
+
+For example:
+
+```cpp
+if (json.containsKey(ThingSpeakAPI_Label))
+```
+
+Then proceed to get every parameter we know we stored there from last CP `Save`.
+
+
+```cpp
+// Parse all config file parameters, override
+// local config variables with parsed values
+if (json.containsKey(ThingSpeakAPI_Label))
+{
+ strcpy(thingspeakApiKey, json[ThingSpeakAPI_Label]);
+}
+
+if (json.containsKey(SensorDht22_Label))
+{
+ sensorDht22 = json[SensorDht22_Label];
+}
+
+if (json.containsKey(PinSDA_Label))
+{
+ pinSda = json[PinSDA_Label];
+}
+
+if (json.containsKey(PinSCL_Label))
+{
+ pinScl = json[PinSCL_Label];
+}
+```
+
+
+### 6.5 Then what to do now
+
+**Just use those parameters for whatever purpose you designed them for in step 1:**
+
+
+```cpp
+The application will use DHT sensor (either DHT11 or DHT22) and need to connect to ThingSpeak with unique user's API Key. The DHT sensor is connected to the ESP boards using SDA/SCL pins which also need to be configurable.
+```
+
+---
+---
+
+## So, how it works?
+
+In `ConfigPortal Mode`, it starts an access point @ the current Static or DHCP IP.
+
+ Connect to it by going to, e.g. `http://192.168.2.232`, you'll see this `Main` page:
+
+
+ 
+
+
+Select `Information` to enter the Info page where the board info will be shown (long page)
+
+
+ 
+
+
+
+Select `Configuration` to enter this page where you can modify its Credentials
+
+
+ 
+
+
+Enter your credentials, then click **Save**. The Credentials will be saved and the board continues, or reboots if necessary, to connect to the selected Static IP or DHCP.
+
+
+ 
+
+
+
+If you're already satisfied with the current settings and don't want to change anything, just select **Exit Portal** from the `Main` page to continue or reboot the board and connect using the previously-stored Credentials.
+
+---
+---
+
+## Documentation
+
+#### Password protect the configuration Access Point
+
+You can password protect the ConfigPortal AP. Check [ESP32_FSWebServer](examples/ESP32_FSWebServer) example
+
+---
+
+#### Callbacks
+
+##### Save settings
+
+This gets called when custom parameters have been set **AND** a connection has been established. Use it to set a flag, so when all the configuration finishes, you can save the extra parameters somewhere.
+
+See [ConfigOnSwitchFS Example](examples/ConfigOnSwitchFS).
+
+```cpp
+ESP32_ENC_manager.setSaveConfigCallback(saveConfigCallback);
+```
+saveConfigCallback declaration and example
+
+```cpp
+//flag for saving data
+bool shouldSaveConfig = false;
+
+//callback notifying us of the need to save config
+void saveConfigCallback ()
+{
+ Serial.println("Should save config");
+ shouldSaveConfig = true;
+}
+```
+
+---
+
+#### ConfigPortal Timeout
+
+If you need to set a timeout so the `ESP32` doesn't hang waiting to be configured for ever.
+
+```cpp
+ESP32_ENC_manager.setConfigPortalTimeout(120);
+```
+
+which will wait 2 minutes (120 seconds). When the time passes, the `startConfigPortal()` function will return and continue the sketch,
+unless you're accessing the `Config Portal`. In this case, the `startConfigPortal()` function will stay until you save config data or exit
+the `Config Portal`.
+
+---
+
+#### On Demand ConfigPortal
+
+Example usage
+
+```cpp
+void loop()
+{
+ // is configuration portal requested?
+ if ((digitalRead(TRIGGER_PIN) == LOW) || (digitalRead(TRIGGER_PIN2) == LOW))
+ {
+ Serial.println(F("\nConfiguration portal requested."));
+ digitalWrite(LED_BUILTIN, LED_ON); // turn the LED on by making the voltage LOW to tell us we are in configuration mode.
+
+ //Local initialization. Once its business is done, there is no need to keep it around
+ // Use this to default DHCP hostname to ESP32-XXXXXX
+ //ESP32_ENC_Manager ESP32_ENC_manager;
+ // Use this to personalize DHCP hostname (RFC952 conformed)
+ ESP32_ENC_Manager ESP32_ENC_manager("ConfigOnSwitch");
+
+#if !USE_DHCP_IP
+#if USE_CONFIGURABLE_DNS
+ // Set static IP, Gateway, Subnetmask, DNS1 and DNS2
+ ESP32_ENC_manager.setSTAStaticIPConfig(stationIP, gatewayIP, netMask, dns1IP, dns2IP);
+#else
+ // Set static IP, Gateway, Subnetmask, Use auto DNS1 and DNS2.
+ ESP32_ENC_manager.setSTAStaticIPConfig(stationIP, gatewayIP, netMask);
+#endif
+#endif
+
+#if USING_CORS_FEATURE
+ ESP32_ENC_manager.setCORSHeader("Your Access-Control-Allow-Origin");
+#endif
+
+ //Check if there is stored credentials.
+ //If not found, device will remain in configuration mode until switched off via webserver.
+ Serial.println(F("Opening configuration portal. "));
+
+ if (loadConfigData())
+ {
+ ESP32_ENC_manager.setConfigPortalTimeout(
+ 120); //If no access point name has been previously entered disable timeout.
+ Serial.println(F("Got stored Credentials. Timeout 120s for Config Portal"));
+ }
+ else
+ {
+ // Enter CP only if no stored SSID on flash and file
+ ESP32_ENC_manager.setConfigPortalTimeout(0);
+ Serial.println(F("Open Config Portal without Timeout: No stored Credentials."));
+ initialConfig = true;
+ }
+
+ //Starts an access point
+ //and goes into a blocking loop awaiting configuration
+ if (!ESP32_ENC_manager.startConfigPortal())
+ Serial.println(F("Not connected to ETH network but continuing anyway."));
+ else
+ {
+ Serial.println(F("ETH network connected...yeey :)"));
+ Serial.print(F("Local IP: "));
+ Serial.println(ETH.localIP());
+ }
+
+#if USE_ESP_ETH_MANAGER_NTP
+ String tempTZ = ESP32_ENC_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 = ESP32_ENC_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
+
+ ESP32_ENC_manager.getSTAStaticIPConfig(EthSTA_IPconfig);
+
+ saveConfigData();
+
+#if !USE_DHCP_IP
+
+ // Reset to use new Static IP, if different from current ETH.localIP()
+ if (ETH.localIP() != EthSTA_IPconfig._sta_static_ip)
+ {
+ Serial.print(F("Current IP = "));
+ Serial.print(ETH.localIP());
+ Serial.print(F(". Reset to take new IP = "));
+ Serial.println(EthSTA_IPconfig._sta_static_ip);
+
+ ESP.restart();
+ delay(2000);
+ }
+
+#endif
+
+ digitalWrite(LED_BUILTIN, LED_OFF); // Turn led off as we are not in configuration mode.
+ }
+
+ // put your main code here, to run repeatedly
+ check_status();
+}
+```
+
+See [ConfigOnSwitch](examples/ConfigOnSwitch) example for a more complex version.
+
+---
+---
+
+#### Custom Parameters
+
+Many applications need configuration parameters like `MQTT host and port`, [Blynk](http://www.blynk.cc) or [emoncms](http://emoncms.org) tokens, etc. While it is possible to use [`ESP32_ENC_Manager`](https://github.com/khoih-prog/ESP32_ENC_Manager) to collect additional parameters, it is better to read these parameters from a web service once [`ESP32_ENC_Manager`](https://github.com/khoih-prog/ESP32_ENC_Manager) has been used to connect to the Internet.
+
+To capture other parameters with [`ESP32_ENC_Manager`](https://github.com/khoih-prog/ESP32_ENC_Manager) is a little bit more complicated than all the other features. This requires adding custom HTML to your form.
+
+If you want to do it with [`ESP32_ENC_Manager`](https://github.com/khoih-prog/ESP32_ENC_Manager) see the example [ConfigOnSwitchFS](examples/ConfigOnSwitchFS)
+
+---
+
+#### Custom IP Configuration
+
+You can set a custom IP for STA (station mode, client mode, normal project state)
+
+
+##### Custom Station (client) Static IP Configuration
+
+This will use the specified IP configuration instead of using DHCP in station mode.
+
+```cpp
+ESP32_ENC_manager.setSTAStaticIPConfig(IPAddress(192,168,2,232), IPAddress(192,168,2,1), IPAddress(255,255,255,0));
+```
+
+---
+
+#### Custom HTML, CSS, Javascript
+
+There are various ways in which you can inject custom HTML, CSS or Javascript into the ConfigPortal.
+
+The options are:
+
+- **inject custom head element**
+
+You can use this to any html bit to the head of the ConfigPortal. If you add a `");
+```
+
+- **inject a custom bit of html in the configuration form**
+
+```cpp
+ESP32_EMParameter custom_text("This is just a text paragraph
");
+ESP32_ENC_manager.addParameter(&custom_text);
+```
+
+- **inject a custom bit of html in a configuration form element**
+
+Just add the bit you want added as the last parameter to the custom parameter constructor.
+
+```cpp
+ESP32_EMParameter custom_mqtt_server("server", "mqtt server", "iot.eclipse", 40, " readonly");
+```
+
+---
+---
+
+#### How to connect ENC28J60 to ESP32
+
+You can change the `INT` pin to another one. Default is `GPIO4`
+
+```cpp
+// Must connect INT to GPIOxx or not working
+#define INT_GPIO 4
+```
+
+---
+
+
+
+ 
+
+
+
+
+|ENC28J60|<--->|ESP32|
+|:-:|:-:|:-:|
+|MOSI|<--->|GPIO23|
+|MISO|<--->|GPIO19|
+|SCK|<--->|GPIO18|
+|SS|<--->|GPIO5|
+|INT|<--->|GPIO4|
+|GND|<--->|GND|
+|3.3V|<--->|3.3V|
+
+---
+---
+
+### Examples
+
+ 1. [ConfigOnSwitch](examples/ConfigOnSwitch)
+ 2. [ConfigOnSwitchFS](examples/ConfigOnSwitchFS)
+ 3. [ConfigOnDoubleReset_TZ](examples/ConfigOnDoubleReset_TZ) (now support ArduinoJson 6.0.0+ as well as 5.13.5-)
+ 4. [ConfigOnDoubleReset](examples/ConfigOnDoubleReset) (now support ArduinoJson 6.0.0+ as well as 5.13.5-)
+ 5. [ConfigPortalParamsOnSwitch](examples/ConfigPortalParamsOnSwitch) (now support ArduinoJson 6.0.0+ as well as 5.13.5-)
+ 6. [ESP32_FSWebServer](examples/ESP32_FSWebServer)
+ 7. [ESP32_FSWebServer_DRD](examples/ESP32_FSWebServer_DRD)
+
+---
+---
+
+### Example [ConfigOnSwitch](examples/ConfigOnSwitch)
+
+
+https://github.com/khoih-prog/ESP32_ENC_Manager/blob/9dfa0c4c6d488d175866cf9917e6b1cec4ea7220/examples/ConfigOnSwitch/ConfigOnSwitch.ino#L27-L908
+
+---
+---
+
+### Debug Terminal Output Samples
+
+#### 1. ConfigOnDoubleReset_TZ using LittleFS on ESP32_DEV with ESP32_ENC28J60
+
+##### 1.1 DRD => Config Portal
+
+This is terminal debug output when running [ConfigOnDoubleReset](examples/ConfigOnDoubleReset) on **ESP32_ENC28J60**. `Config Portal` was requested by DRD to input and save Credentials, such as Static IP address.
+
+```
+Starting ConfigOnDoubleReset_TZ using LittleFS on ESP32_DEV with ESP32_ENC28J60
+ESP32_ENC_Manager v1.0.0
+ESP_DoubleResetDetector v1.3.2
+[EM] Default SPI pinout:
+[EM] MOSI: 23
+[EM] MISO: 19
+[EM] SCK: 18
+[EM] CS: 5
+[EM] INT: 4
+[EM] SPI Clock (MHz): 8
+[EM] =========================
+ETH Started
+[EM] RFC925 Hostname = ConfigOnDoubleReset_TZ
+[EM] setSTAStaticIPConfig
+[EM] Set CORS Header to : Your Access-Control-Allow-Origin
+[EM] LoadCfgFile
+[EM] OK
+[EM] stationIP = 192.168.2.232 , gatewayIP = 192.168.2.1
+[EM] netMask = 255.255.255.0
+[EM] dns1IP = 192.168.2.1 , dns2IP = 8.8.8.8
+Got stored Credentials. Timeout 120s for Config Portal
+[EM] Current TZ_Name = America/New_York , TZ = EST5EDT,M3.2.0,M11.1.0
+[EM] stationIP = 192.168.2.232 , gatewayIP = 192.168.2.1
+[EM] netMask = 255.255.255.0
+[EM] dns1IP = 192.168.2.1 , dns2IP = 8.8.8.8
+ETH Connected
+ETH MAC: DE:AD:BE:EF:BE:0C, IPv4: 192.168.2.232
+FULL_DUPLEX, 10Mbps
+LittleFS Flag read = 0xD0D01234
+doubleResetDetected
+Saving config file...
+Saving config file OK
+Open Config Portal without Timeout: Double Reset Detected
+Starting configuration portal @ 192.168.2.232
+[EM] _configPortalStart millis() = 2325
+[EM] Config Portal IP address = 192.168.2.232
+[EM] HTTP server started
+[EM] startConfigPortal : Enter loop
+[EM] handleRoot
+
+[EM] captivePortal: hostHeader = 192.168.2.232
+[EM] Handle ETH
+[EM] Static IP = 192.168.2.232
+[EM] Sent config page
+[EM] ETH save
+[EM] TZ name = America/New_York
+[EM] New Static IP = 192.168.2.233
+[EM] New Static Gateway = 192.168.2.1
+[EM] New Static Netmask = 255.255.255.0
+[EM] New Static DNS1 = 192.168.2.1
+[EM] New Static DNS2 = 8.8.8.8
+[EM] Sent eth save page
+[EM] stopConfigPortal
+ETH network connected...yeey :)
+[EM] Saving current TZ_Name = America/New_York , TZ = EST5EDT,M3.2.0,M11.1.0
+[EM] getSTAStaticIPConfig
+[EM] SaveCfgFile
+[EM] stationIP = 192.168.2.233 , gatewayIP = 192.168.2.1
+[EM] netMask = 255.255.255.0
+[EM] dns1IP = 192.168.2.1 , dns2IP = 8.8.8.8
+[EM] OK
+Current IP = 192.168.2.232. Reset to take new IP = 192.168.2.233
+ets Jun 8 2016 00:22:57
+```
+
+##### 1.2. Get new Static IP after reset
+
+```
+Starting ConfigOnDoubleReset_TZ using LittleFS on ESP32_DEV with ESP32_ENC28J60
+ESP32_ENC_Manager v1.0.0
+ESP_DoubleResetDetector v1.3.2
+[EM] Default SPI pinout:
+[EM] MOSI: 23
+[EM] MISO: 19
+[EM] SCK: 18
+[EM] CS: 5
+[EM] INT: 4
+[EM] SPI Clock (MHz): 8
+[EM] =========================
+ETH Started
+[EM] RFC925 Hostname = ConfigOnDoubleReset_TZ
+[EM] setSTAStaticIPConfig
+[EM] Set CORS Header to : Your Access-Control-Allow-Origin
+[EM] LoadCfgFile
+[EM] OK
+[EM] stationIP = 192.168.2.233 , gatewayIP = 192.168.2.1
+[EM] netMask = 255.255.255.0
+[EM] dns1IP = 192.168.2.1 , dns2IP = 8.8.8.8
+Got stored Credentials. Timeout 120s for Config Portal
+[EM] Current TZ_Name = America/New_York , TZ = EST5EDT,M3.2.0,M11.1.0
+[EM] stationIP = 192.168.2.233 , gatewayIP = 192.168.2.1
+[EM] netMask = 255.255.255.0
+[EM] dns1IP = 192.168.2.1 , dns2IP = 8.8.8.8
+ETH Connected
+ETH MAC: DE:AD:BE:EF:FE:0D, IPv4: 192.168.2.233
+FULL_DUPLEX, 10Mbps
+LittleFS Flag read = 0xD0D04321
+No doubleResetDetected
+Saving config file...
+Saving config file OK
+After waiting 0.00 secs more in setup(), connection result is connected. Local IP: 192.168.2.233
+[EM] freeing allocated params!
+Local Date/Time: Sat Dec 10 22:03:59 2022
+Stop doubleResetDetecting
+Saving config file...
+Saving config file OK
+Local Date/Time: Sun Dec 11 00:59:48 2022
+Local Date/Time: Sun Dec 11 01:00:48 2022
+Local Date/Time: Sun Dec 11 01:01:48 2022
+Local Date/Time: Sun Dec 11 01:02:48 2022
+```
+
+---
+
+#### 2. ConfigOnSwichFS using LittleFS on ESP32_DEV with ESP32_ENC28J60
+
+This is terminal debug output when running [ConfigOnSwichFS](examples/ConfigOnSwichFS) on **ESP32_ENC28J60**. `Config Portal` was requested to input and save Credentials.
+
+
+```
+Starting ConfigOnSwichFS using LittleFS on ESP32_DEV with ESP32_ENC28J60
+ESP32_ENC_Manager v1.0.0
+[EM] Default SPI pinout:
+[EM] MOSI: 23
+[EM] MISO: 19
+[EM] SCK: 18
+[EM] CS: 5
+[EM] INT: 4
+[EM] SPI Clock (MHz): 8
+[EM] =========================
+ETH Started
+Configuration file not found
+Failed to read ConfigFile, using default values
+[EM] RFC925 Hostname = ConfigOnSwitchFS
+[EM] setSTAStaticIPConfig
+[EM] Set CORS Header to : Your Access-Control-Allow-Origin
+[EM] LoadCfgFile
+[EM] OK
+[EM] stationIP = 192.168.2.232 , gatewayIP = 192.168.2.1
+[EM] netMask = 255.255.255.0
+[EM] dns1IP = 192.168.2.1 , dns2IP = 8.8.8.8
+Got stored Credentials. Timeout 120s for Config Portal
+[EM] Current TZ_Name = America/New_York , TZ = EST5EDT,M3.2.0,M11.1.0
+[EM] stationIP = 192.168.2.232 , gatewayIP = 192.168.2.1
+[EM] netMask = 255.255.255.0
+[EM] dns1IP = 192.168.2.1 , dns2IP = 8.8.8.8
+ETH Connected
+ETH MAC: DE:AD:BE:EF:FE:07, IPv4: 192.168.2.232
+FULL_DUPLEX, 10Mbps
+After waiting 0.00 secs more in setup(), connection result is connected. Local IP: 192.168.2.232
+[EM] freeing allocated params!
+Local Date/Time: Thu Dec 8 16:31:38 2022
+
+Configuration portal requested.
+[EM] RFC925 Hostname = ConfigOnSwitchFS
+Opening configuration portal.
+[EM] LoadCfgFile
+[EM] OK
+[EM] stationIP = 192.168.2.232 , gatewayIP = 192.168.2.1
+[EM] netMask = 255.255.255.0
+[EM] dns1IP = 192.168.2.1 , dns2IP = 8.8.8.8
+Got stored Credentials. Timeout 120s for Config Portal
+[EM] Adding parameter thingspeakApiKey
+[EM] Adding parameter SensorDHT22
+[EM] Adding parameter PinSda
+[EM] Adding parameter PinScl
+[EM] setSTAStaticIPConfig for USE_CONFIGURABLE_DNS
+[EM] Set CORS Header to : Your Access-Control-Allow-Origin
+[EM] _configPortalStart millis() = 17427
+[EM] Config Portal IP address = 192.168.2.232
+[EM] HTTP server started
+[EM] startConfigPortal : Enter loop
+[EM] handleRoot
+[EM] request host IP = 192.168.2.232
+[EM] Handle ETH
+[EM] Static IP = 192.168.2.232
+[EM] Sent config page
+[EM] ETH save
+[EM] TZ = America/New_York
+[EM] Parameter and value : thingspeakApiKey API_Key
+[EM] Parameter and value : SensorDHT22 T
+[EM] Parameter and value : PinSda 21
+[EM] Parameter and value : PinScl 22
+[EM] New Static IP = 192.168.2.233
+[EM] New Static Gateway = 192.168.2.1
+[EM] New Static Netmask = 255.255.255.0
+[EM] New Static DNS1 = 192.168.2.1
+[EM] New Static DNS2 = 8.8.8.8
+[EM] Sent eth save page
+[EM] stopConfigPortal
+[EM] startConfigPortal: exit, _configPortalTimeout = 0 millis() = 67391
+ETH network connected...yeey :)
+Local IP: 192.168.2.232
+[EM] Saving current TZ_Name = America/New_York , TZ = EST5EDT,M3.2.0,M11.1.0
+[EM] getSTAStaticIPConfig
+[EM] SaveCfgFile
+[EM] stationIP = 192.168.2.233 , gatewayIP = 192.168.2.1
+[EM] netMask = 255.255.255.0
+[EM] dns1IP = 192.168.2.1 , dns2IP = 8.8.8.8
+[EM] OK
+Saving config file
+{
+ "thingspeakApiKey": "API_Key",
+ "SensorDHT22": true,
+ "PinSda": 21,
+ "PinScl": 22
+}
+Config file was successfully saved
+[EM] freeing allocated params!
+Local Date/Time: Sun Dec 11 00:59:48 2022
+Local Date/Time: Sun Dec 11 01:00:48 2022
+Local Date/Time: Sun Dec 11 01:01:48 2022
+Local Date/Time: Sun Dec 11 01:02:48 2022
+```
+
+---
+
+#### 3. ESP32_FSWebServer_DRD using LittleFS on ESP32_DEV with ESP32_ENC28J60
+
+This is terminal debug output when running [ESP32_FSWebServer_DRD](examples/ESP32_FSWebServer_DRD) on **ESP32_ENC28J60**. `Config Portal` was requested by DRD (also using **LittleFS**) to input and save Credentials.
+
+
+```cpp
+Starting ESP32_FSWebServer_DRD using LittleFS on ESP32_DEV with ESP32_ENC28J60
+ESP32_ENC_Manager v1.0.0
+ESP_DoubleResetDetector v1.3.2
+FS File: CanadaFlag_1.png, size: 40.25KB
+FS File: CanadaFlag_2.png, size: 8.12KB
+FS File: CanadaFlag_3.jpg, size: 10.89KB
+FS File: drd.dat, size: 4B
+FS File: edit.htm.gz, size: 4.02KB
+FS File: eth_cred.dat, size: 142B
+FS File: favicon.ico, size: 1.12KB
+FS File: graphs.js.gz, size: 1.92KB
+FS File: index.htm, size: 3.63KB
+FS File: mrd.dat, size: 4B
+FS File: page1.html, size: 1.16KB
+FS File: page2.html, size: 1.16KB
+FS File: page3.html, size: 1.16KB
+FS File: wifi_cred.dat, size: 334B
+FS File: wm_config.bak, size: 236B
+FS File: wm_config.dat, size: 236B
+FS File: wm_cp.bak, size: 4B
+FS File: wm_cp.dat, size: 4B
+FS File: wm_cred.bak, size: 180B
+FS File: wm_cred.dat, size: 180B
+[EM] Default SPI pinout:
+[EM] MOSI: 23
+[EM] MISO: 19
+[EM] SCK: 18
+[EM] CS: 5
+[EM] INT: 4
+[EM] SPI Clock (MHz): 8
+[EM] =========================
+ETH Started
+[EM] RFC925 Hostname = ESP32-FSWebServerDRD
+[EM] setSTAStaticIPConfig
+[EM] Set CORS Header to : Your Access-Control-Allow-Origin
+[EM] LoadCfgFile
+[EM] OK
+[EM] stationIP = 192.168.2.233 , gatewayIP = 192.168.2.1
+[EM] netMask = 255.255.255.0
+[EM] dns1IP = 192.168.2.1 , dns2IP = 8.8.8.8
+[EM] stationIP = 192.168.2.233 , gatewayIP = 192.168.2.1
+[EM] netMask = 255.255.255.0
+[EM] dns1IP = 192.168.2.1 , dns2IP = 8.8.8.8
+ETH Connected
+ETH MAC: DE:AD:BE:EF:BE:10, IPv4: 192.168.2.233
+FULL_DUPLEX, 10Mbps
+Got stored Credentials. Timeout 120s for Config Portal
+LittleFS Flag read = 0xD0D04321
+No doubleResetDetected
+Saving config file...
+Saving config file OK
+After waiting 0.00 secs more in setup(), connection result is connected. Local IP: 192.168.2.233
+HTTP server started @ 0.0.0.0
+HTTP server started @ 192.168.2.233
+===============================================================
+Open http://192.168.2.233/edit to see the file browser
+Using username = admin and password = admin
+===============================================================
+[EM] freeing allocated params!
+HStop doubleResetDetecting
+Saving config file...
+Saving config file OK
+HHHhandleFileRead: /edit.htm
+handleFileRead: /index.htm
+handleFileList: /
+handleFileList: [{"type":"file","name":"CanadaFlag_1.png"},{"type":"file","name":"CanadaFlag_2.png"},{"type":"file","name":"CanadaFlag_3.jpg"},{"type":"file","name":"drd.dat"},{"type":"file","name":"edit.htm.gz"},{"type":"file","name":"eth_cred.dat"},{"type":"file","name":"favicon.ico"},{"type":"file","name":"graphs.js.gz"},{"type":"file","name":"index.htm"},{"type":"file","name":"mrd.dat"},{"type":"file","name":"page1.html"},{"type":"file","name":"page2.html"},{"type":"file","name":"page3.html"},{"type":"file","name":"wifi_cred.dat"},{"type":"file","name":"wm_config.bak"},{"type":"file","name":"wm_config.dat"},{"type":"file","name":"wm_cp.bak"},{"type":"file","name":"wm_cp.dat"},{"type":"file","name":"wm_cred.bak"},{"type":"file","name":"wm_cred.dat"}]
+handleFileRead: /CanadaFlag_1.png
+HH
+```
+
+---
+---
+
+### Debug
+
+Debug is enabled by default on Serial. To disable, add before `startConfigPortal()`
+
+```cpp
+ESP32_ENC_manager.setDebugOutput(false);
+```
+
+You can also change the debugging level from 0 to 4
+
+```cpp
+// Use from 0 to 4. Higher number, more debugging messages and memory usage.
+#define _ESP32_ETH_MGR_LOGLEVEL_ 3
+```
+---
+
+### Troubleshooting
+
+If you get compilation errors, more often than not, you may need to install a newer version of the `ESP32` core for Arduino.
+
+Sometimes, the library will only work if you update the `ESP32` core to the latest version because I am using some newly added function.
+
+If you connect to the created configuration Access Point but the ConfigPortal does not show up, just open a browser and type in the IP of the web portal, by default `192.168.2.232`.
+
+---
+
+### Issues ###
+
+Submit issues to: [ESP32_ENC_Manager issues](https://github.com/khoih-prog/ESP32_ENC_Manager/issues)
+
+---
+---
+
+
+### Contributions and Thanks
+
+ 1. Based on and modified from [Tzapu](https://github.com/tzapu/WiFiManager), [KenTaylor's version]( https://github.com/kentaylor/WiFiManager), and [`Khoi Hoang's ESP_WiFiManager`](https://github.com/khoih-prog/ESP_WiFiManager).
+
+
+
+
+---
+
+### Contributing
+
+If you want to contribute to this project:
+
+- Report bugs and errors
+- Ask for enhancements
+- Create issues and pull requests
+- Tell other people about this library
+
+---
+
+### License and credits
+
+- The library is licensed under [MIT](https://github.com/khoih-prog/ESP32_ENC_Manager/blob/main/LICENSE)
+
+---
+
+## Copyright
+
+Copyright 2022- Khoi Hoang
+
+
+
+---
+---
+
+## Table of Contents
+
+* [Why do we need this ESP32_ENC_Manager library](#why-do-we-need-this-ESP32_ENC_Manager-library)
+ * [Features](#features)
+ * [Currently supported Boards](#currently-supported-boards)
+* [Changelog](changelog.md)
+* [Prerequisites](#prerequisites)
+* [Installation](#installation)
+ * [Use Arduino Library Manager](#use-arduino-library-manager)
+ * [Manual Install](#manual-install)
+ * [VS Code & PlatformIO](#vs-code--platformio)
+* [Note for Platform IO using ESP32 LittleFS](#note-for-platform-io-using-esp32-littlefs)
+* [HOWTO Fix `Multiple Definitions` Linker Error](#howto-fix-multiple-definitions-linker-error)
+* [HOWTO Use analogRead() with ESP32 running WiFi and/or BlueTooth (BT/BLE)](#howto-use-analogread-with-esp32-running-wifi-andor-bluetooth-btble)
+ * [1. ESP32 has 2 ADCs, named ADC1 and ADC2](#1--esp32-has-2-adcs-named-adc1-and-adc2)
+ * [2. ESP32 ADCs functions](#2-esp32-adcs-functions)
+ * [3. ESP32 WiFi uses ADC2 for WiFi functions](#3-esp32-wifi-uses-adc2-for-wifi-functions)
+* [How It Works](#how-it-works)
+* [HOWTO Basic configurations](#howto-basic-configurations)
+ * [1. Using default for every configurable parameter](#1-using-default-for-every-configurable-parameter)
+ * [2. Using many configurable parameters](#2-using-many-configurable-parameters)
+ * [3. Using STA-mode DHCP, but don't like to change to static IP or display in Config Portal](#3-using-sta-mode-dhcp-but-dont-like-to-change-to-static-ip-or-display-in-config-portal)
+ * [4. Using STA-mode DHCP, but permit to change to static IP and display in Config Portal](#4-using-sta-mode-dhcp-but-permit-to-change-to-static-ip-and-display-in-config-portal)
+ * [5. Using STA-mode StaticIP, and be able to change to DHCP IP and display in Config Portal](#5-using-sta-mode-staticip-and-be-able-to-change-to-dhcp-ip-and-display-in-config-portal)
+ * [6. Using STA-mode StaticIP and configurable DNS, and be able to change to DHCP IP and display in Config Portal](#6-using-sta-mode-staticip-and-configurable-dns-and-be-able-to-change-to-dhcp-ip-and-display-in-config-portal)
+ * [7. Using STA-mode StaticIP and auto DNS, and be able to change to DHCP IP and display in Config Portal](#7-using-sta-mode-staticip-and-auto-dns-and-be-able-to-change-to-dhcp-ip-and-display-in-config-portal)
+ * [8. Not using NTP to avoid issue with some WebBrowsers, especially in CellPhone or Tablets.](#8-not-using-ntp-to-avoid-issue-with-some-webbrowsers-especially-in-cellphone-or-tablets)
+ * [9. Using NTP feature with CloudFlare. System can hang until you have Internet access for CloudFlare.](#9-using-ntp-feature-with-cloudflare-system-can-hang-until-you-have-internet-access-for-cloudflare)
+ * [10. Using NTP feature without CloudFlare to avoid system hang if no Internet access for CloudFlare.](#10-using-ntp-feature-without-cloudflare-to-avoid-system-hang-if-no-internet-access-for-cloudflare)
+ * [11. Setting STA-mode static IP](#11-setting-sta-mode-static-ip)
+ * [12. Using CORS (Cross-Origin Resource Sharing) feature](#12-using-cors-cross-origin-resource-sharing-feature)
+ * [13. How to auto getting _timezoneName](#13-how-to-auto-getting-_timezonename)
+ * [14. How to get TZ variable to configure Timezone](#14-how-to-get-tz-variable-to-configure-timezone)
+ * [15. How to use the TZ variable to configure Timezone](#15-how-to-use-the-tz-variable-to-configure-timezone)
+* [HOWTO Open Config Portal](#howto-open-config-portal)
+* [HOWTO Add Dynamic Parameters](#howto-add-dynamic-parameters)
+ * [1. Determine the variables to be configured via Config Portal (CP)](#1-determine-the-variables-to-be-configured-via-config-portal-cp)
+ * [2. Initialize the variables to prepare for Config Portal (CP)](#2-initialize-the-variables-to-prepare-for-config-portal-cp)
+ * [2.1 Use the following simple constructor for simple variables such as `thingspeakApiKey`, `pinSda` and `pinScl`](#21-use-the-following-simple-constructor-for-simple-variables-such-as-thingspeakapikey-pinsda-and-pinscl-)
+ * [2.2 For example, to create a new `ESP32_EMParameter` object `p_thingspeakApiKey` for `thingspeakApiKey`](#22-for-example-to-create-a-new-ESP32_EMParameter-object-p_thingspeakapikey-for-thingspeakapikey)
+ * [2.3 Use the more complex following constructor for variables such as `sensorDht22`](#23-use-the-more-complex-following-constructor-for-variables-such-as-sensordht22)
+ * [2.4 For example, to create a new `ESP32_EMParameter` object `p_sensorDht22` for `sensorDht22`](#24-for-example-to-create-a-new-ESP32_EMParameter-object-p_sensordht22-for-sensordht22)
+ * [3. Add the variables to Config Portal (CP)](#3-add-the-variables-to-config-portal-cp)
+ * [3.1 addParameter() function Prototype:](#31-addparameter-function-prototype)
+ * [3.2 Code to add variables to CP](#32-code-to-add-variables-to-cp)
+ * [4. Save the variables configured in Config Portal (CP)](#4-save-the-variables-configured-in-config-portal-cp)
+ * [4.1 Getting variables' data from CP](#41-getting-variables-data-from-cp)
+ * [5. Write to FS (SPIFFS, LittleFS, etc.) using JSON format](#5-write-to-fs-spiffs-littlefs-etc-using-json-format)
+ * [5.1 Create a DynamicJsonDocument Object](#51-create-a-dynamicjsondocument-object)
+ * [5.2 Fill the DynamicJsonDocument Object with data got from Config Portal](#52-fill-the-dynamicjsondocument-object-with-data-got-from-config-portal)
+ * [5.3 Open file to write the Jsonified data](#53-open-file-to-write-the-jsonified-data)
+ * [5.4 Write the Jsonified data to CONFIG_FILE](#54-write-the-jsonified-data-to-config_file)
+ * [5.5 Close CONFIG_FILE to flush and save the data](#55-close-config_file-to-flush-and-save-the-data)
+ * [6. Read from FS using JSON format](#6-read-from-fs-using-json-format)
+ * [6.1 Open CONFIG_FILE to read](#61-open-config_file-to-read)
+ * [6.2 Open CONFIG_FILE to read](62-open-config_file-to-read)
+ * [6.3 Populate the just-read Jsonified data into the DynamicJsonDocument json object](#63-populate-the-just-read-jsonified-data-into-the-dynamicjsondocument-json-object)
+ * [6.4 Parse the Jsonified data from the DynamicJsonDocument json object to store into corresponding parameters](#64-parse-the-jsonified-data-from-the-dynamicjsondocument-json-object-to-store-into-corresponding-parameters)
+ * [6.5 Then what to do now](#65-then-what-to-do-now)
+* [So, how it works?](#so-how-it-works)
+* [Documentation](#documentation)
+ * [Password protect the configuration Access Point](#password-protect-the-configuration-access-point)
+ * [Callbacks](#callbacks)
+ * [Save settings](#save-settings)
+ * [ConfigPortal Timeout](#configportal-timeout)
+ * [On Demand ConfigPortal](#on-demand-configportal)
+ * [Custom Parameters](#custom-parameters)
+ * [Custom IP Configuration](#custom-ip-configuration)
+ * [Custom Station (client) Static IP Configuration](#custom-station-client-static-ip-configuration)
+ * [Custom HTML, CSS, Javascript](#custom-html-css-javascript)
+* [How to connect ENC28J60 to ESP32](#How-to-connect-ENC28J60-to-ESP32)
+* [Examples](#examples)
+ * [ConfigOnSwitch](examples/ConfigOnSwitch)
+ * [ConfigOnSwitchFS](examples/ConfigOnSwitchFS)
+ * [ConfigOnDoubleReset_TZ](examples/ConfigOnDoubleReset_TZ) (now support ArduinoJson 6.0.0+ as well as 5.13.5-)
+ * [ConfigOnDoubleReset](examples/ConfigOnDoubleReset) (now support ArduinoJson 6.0.0+ as well as 5.13.5-)
+ * [ConfigPortalParamsOnSwitch](examples/ConfigPortalParamsOnSwitch) (now support ArduinoJson 6.0.0+ as well as 5.13.5-)
+ * [ESP32_FSWebServer](examples/ESP32_FSWebServer)
+ * [ESP32_FSWebServer_DRD](examples/ESP32_FSWebServer_DRD)
+* [Example ConfigOnSwitch](#example-ConfigOnSwitch)
+* [Debug Terminal Output Samples](#debug-terminal-output-samples)
+ * [1. ConfigOnDoubleReset_TZ using LittleFS on ESP32_DEV with ESP32_ENC28J60](#1-ConfigOnDoubleReset_TZ-using-LittleFS-on-ESP32_DEV-with-ESP32_ENC28J60)
+ * [2. ConfigOnSwichFS using LittleFS on ESP32_DEV with ESP32_ENC28J60](#2-ConfigOnSwichFS-using-LittleFS-on-ESP32_DEV-with-ESP32_ENC28J60)
+ * [3. ESP32_FSWebServer_DRD using LittleFS on ESP32_DEV with ESP32_ENC28J60](#3-ESP32_FSWebServer_DRD-using-LittleFS-on-ESP32_DEV-with-ESP32_ENC28J60)
+* [Debug](#debug)
+* [Troubleshooting](#troubleshooting)
+* [Issues](#issues)
+* [Contributions and Thanks](#contributions-and-thanks)
+* [Contributing](#contributing)
+* [License and credits](#license-and-credits)
+* [Copyright](#copyright)
+
+---
+---
+
+
+### Why do we need this [ESP32_ENC_Manager library](https://github.com/khoih-prog/ESP32_ENC_Manager)
+
+#### Features
+
+This is an `ESP32 + LwIP ENC28J60` Credentials and Connection Manager with fallback Web ConfigPortal. This Library is used for configuring ESP32 Ethernet Static / DHCP and Credentials at runtime. You can specify static DNS servers, personalized HostName and `CORS` feature.
+
+This library is based on, modified and improved from:
+
+1. [`Khoi Hoang's ESP_WiFiManager`](https://github.com/khoih-prog/ESP_WiFiManager)
+
+
+#### Currently supported Boards
+
+This [**ESP32_ENC_Manager** library](https://github.com/khoih-prog/ESP32_ENC_Manager) currently supports these following boards:
+
+ 1. **ESP32_DEV** using `LwIP ENC28J60 Ethernet`
+
+
+
