GitHub - arduino-hmueller01/ESP_WiFiManager_Lite: Light-Weight MultiWiFi/Credentials Manager

ESP_WiFiManager_Lite (Light Weight Credentials / WiFiManager for ESP32/ESP8266)

NOTE: khoih-prog/ESP_WiFiManager_Lite set his repo to Public archive. It is now read-only.
I started to fix bugs and adding new features in the develop branch here. Feel free to use it and to contribute.

Important Change from v1.9.0
- For v1.9.0 and up
Why do we need this ESP_WiFiManager_Lite library
- Features
- Currently supported Boards
Changelog
Prerequisites
Installation
- Use Arduino Library Manager
- Manual Install
- VS Code & PlatformIO
Note for Platform IO using ESP32 LittleFS
HOWTO Use analogRead() with ESP32 running WiFi and/or BlueTooth (BT/BLE)
- 1. ESP32 has 2 ADCs, named ADC1 and ADC2
- 2. ESP32 ADCs functions
- 3. ESP32 WiFi uses ADC2 for WiFi functions
How It Works
How to use
- 1. Basic usage
- 2. Add custom parameters
- 3. Not using custom parameters
- 4. To open Config Portal
- 5. To use different AP WiFi Channel
- 6. To use different static AP IP from default
- 7. To use custom DHCP HostName
- 8. To use custom HTML Style
- 9. To use custom Head Elements
- 10. To use CORS Header
- 11. To use and input only one set of WiFi SSID and PWD
  - 11.1 If you need to use and input only one set of WiFi SSID/PWD
  - 11.2 If you need to use both sets of WiFi SSID/PWD
- 12. To enable auto-scan of WiFi networks for selection in Configuration Portal
- 13. To avoid blocking in loop when WiFi is lost
  - 13.1 Max times to try WiFi per loop
  - 13.2 Interval between reconnection WiFi if lost
- 14. Not using Board_Name on Config_Portal
Examples
- 1. ESP_WiFi
- 2. ESP_WiFi_MQTT
So, how it works?
Important Notes
How to use default Credentials and have them pre-loaded onto Config Portal
- 1. To always load Default Credentials and override Config Portal data
- 2. To load Default Credentials when there is no valid Credentials
- 3. Example of Default Credentials
How to add dynamic parameters from sketch
Important Notes for using Dynamic Parameters' ids
Example ESP_WiFi
- 1. File ESP_WiFi.ino
- 2. File defines.h
- 3. File Credentials.h
- 4. File dynamicParams.h
Debug Terminal Output Samples
- 1. ESP_WiFi on ESP32_DEV
- 2. ESP_WiFi_MQTT on ESP8266_NODEMCU
- 3. ESP_WiFi_MQTT on ESP32S2_DEV
- 4. ESP_WiFi_MQTT on ESP32S2_DEV to demo MultiResetDetector
  - 4.1 MultiResetDetected => Open Config Portal
  - 4.2 Got valid Credentials from Config Portal then connected to WiFi
- 5. ESP_WiFi_MQTT on ESP32_DEV to demo WiFi Scan
  - 5.1 MRD/DRD => Open Config Portal
  - 5.2 Config Data Saved => Connection to Adafruit MQTT
- 6. ESP_WiFi on ESP32S3_DEV New
- 7. ESP_WiFi on ESP32C3_DEV using LittleFS New
Debug
Troubleshooting
Issues
TO DO
DONE
Contributions and Thanks
Contributing
License
Copyright

Important Change from v1.9.0

For v1.9.0 and up

ESP32 chipID is now correct and unique. The previous releases' 32-bit wrong chipID is mainly the 24-bit Organizational Unique Identifier (OUI) plus 8 bits from the correct chipID. That's why ESP_getChipId() function can return duplicated values if the boards are from the same batch.

For example

Chip_ID_64 : 0x98F4AB085288
chipOUI    : 0x98F4AB
chipId     : 0x85288
getEfuseMac: 0x885208ABF498

Why do we need this ESP_WiFiManager_Lite library

Features

If you have used one of the full-fledge WiFiManagers such as :

and have to write complicated callback functions to save custom parameters in SPIFFS/LittleFS/EEPROM, you'd appreciate the simplicity of this Light-Weight Credentials / WiFiManager.

This is a Credentials / WiFi Connection Manager for ESP32 and ESP8266 boards, permitting the addition of custom parameters to be configured in Config Portal. The parameters then will be saved automatically, without the complicated callback functions to handle data saving / retrieving.

You can also specify DHCP HostName, static AP and STA IP. Use much less memory compared to full-fledge WiFiManager. Config Portal will be auto-adjusted to match the number of dynamic custom parameters. Credentials are saved in LittleFS, SPIFFS or EEPROM.

The web configuration portal, served from the ESP32/ESP8266 WiFi is operating as an access point (AP) with configurable static IP address or use default IP Address of 192.168.4.1

New recent features:

MultiWiFi feature for configuring/auto(re)connecting ESP32/ESP8266 WiFi to the available MultiWiFi APs at runtime.
Multi/DoubleDetectDetector feature to force Config Portal when multi/double reset is detected within predetermined time, default 10s.
Powerful-yet-simple-to-use feature to enable adding dynamic custom parameters from sketch and input using the same Config Portal. Config Portal will be auto-adjusted to match the number of dynamic parameters.
Optional default Credentials as well as Dynamic parameters to be optionally autoloaded into Config Portal to use or change instead of manually input.
Dynamic custom parameters to be saved automatically in non-volatile memory, such as LittleFS, SPIFFS or EEPROM..
Configurable Config Portal Title to be either BoardName or default undistinguishable names.
Examples are designed to separate Credentials / Defines / Dynamic Params / Code so that you can change Credentials / Dynamic Params quickly for each device.
Control Config Portal from software or Virtual Switches
To permit autoreset after configurable timeout if DRD/MRD or non-persistent forced-CP
Use new ESP32 LittleFS features
Scan WiFi networks for selection in Configuration Portal

Currently supported Boards

This ESP_WiFiManager_Lite library currently supports these following boards:

ESP8266 and ESP32-based boards using EEPROM, SPIFFS or LittleFS.
ESP32-S2 (ESP32-S2 Saola, AI-Thinker ESP-12K, etc.) using EEPROM, SPIFFS or LittleFS.
ESP32-C3 (ARDUINO_ESP32C3_DEV) using EEPROM, SPIFFS or LittleFS.
ESP32-S3 (ESP32S3_DEV, ESP32_S3_BOX, UM TINYS3, UM PROS3, UM FEATHERS3, etc.) using EEPROM, SPIFFS or LittleFS.

Prerequisites

Arduino IDE 1.8.19+ for Arduino.
ESP32 Core 2.0.6+ for ESP32-based boards.
ESP8266 Core 3.1.1+ for ESP8266-based boards. . SPIFFS is deprecated from ESP8266 core 2.7.1+, to use LittleFS.
ESP_DoubleResetDetector v1.3.2+ if using DRD feature. To install, check .
ESP_MultiResetDetector v1.3.2+ if using MRD feature. To install, check .
LittleFS_esp32 v1.0.6+ for ESP32-based boards using LittleFS with ESP32 core v1.0.5-. To install, check . Notice: This LittleFS_esp32 library has been integrated to Arduino ESP32 core v1.0.6+ and you don't need to install it if using ESP32 core v1.0.6+

Installation

Use Arduino Library Manager

The best and easiest way is to use Arduino Library Manager. Search for ESP_WiFiManager_Lite, then select / install the latest version. You can also use this link for more detailed instructions.

Manual Install

Navigate to ESP_WiFiManager_Lite page.
Download the latest release ESP_WiFiManager_Lite-main.zip.
Extract the zip file to ESP_WiFiManager_Lite-main directory
Copy the whole

ESP_WiFiManager_Lite-main folder to Arduino libraries' directory such as ~/Arduino/libraries/.

VS Code & PlatformIO:

Install VS Code
Install PlatformIO
Install ESP_WiFiManager_Lite library by using Library Manager. Search for ESP_WiFiManager_Lite in Platform.io Author's Libraries
Use included platformio.ini file from examples to ensure that all dependent libraries will installed automatically. Please visit documentation for the other options and examples at Project Configuration File

Note for Platform IO using ESP32 LittleFS

Necessary only for esp32 core v1.0.6-

From esp32 core v1.0.6+, LittleFS_esp32 v1.0.6 has been included and this step is not necessary anymore.

In Platform IO, to fix the error when using LittleFS_esp32 v1.0 for ESP32-based boards with ESP32 core v1.0.4- (ESP-IDF v3.2-), uncomment the following line

from

//#define CONFIG_LITTLEFS_FOR_IDF_3_2   /* For old IDF - like in release 1.0.4 */

to

#define CONFIG_LITTLEFS_FOR_IDF_3_2   /* For old IDF - like in release 1.0.4 */

It's advisable to use the latest LittleFS_esp32 v1.0.5+ to avoid the issue.

Thanks to Roshan to report the issue in Error esp_littlefs.c 'utime_p'

HOWTO Use analogRead() with ESP32 running WiFi and/or BlueTooth (BT/BLE)

Please have a look at ESP_WiFiManager Issue 39: Not able to read analog port when using the autoconnect example to have more detailed description and solution of the issue.

1. ESP32 has 2 ADCs, named ADC1 and ADC2

2. ESP32 ADCs functions

ADC1 controls ADC function for pins GPIO32-GPIO39
ADC2 controls ADC function for pins GPIO0, 2, 4, 12-15, 25-27

3.. ESP32 WiFi uses ADC2 for WiFi functions

Look in file adc_common.c

In ADC2, there're two locks used for different cases:

lock shared with app and Wi-Fi: ESP32: When Wi-Fi using the ADC2, we assume it will never stop, so app checks the lock and returns immediately if failed. ESP32S2: The controller's control over the ADC is determined by the arbiter. There is no need to control by lock.

lock shared between tasks: when several tasks sharing the ADC2, we want to guarantee all the requests will be handled. Since conversions are short (about 31us), app returns the lock very soon, we use a spinlock to stand there waiting to do conversions one by one.

adc2_spinlock should be acquired first, then adc2_wifi_lock or rtc_spinlock.

In order to use ADC2 for other functions, we have to acquire complicated firmware locks and very difficult to do
So, it's not advisable to use ADC2 with WiFi/BlueTooth (BT/BLE).
Use ADC1, and pins GPIO32-GPIO39
If somehow it's a must to use those pins serviced by ADC2 (GPIO0, 2, 4, 12, 13, 14, 15, 25, 26 and 27), use the fix mentioned at the end of ESP_WiFiManager Issue 39: Not able to read analog port when using the autoconnect example to work with ESP32 WiFi/BlueTooth (BT/BLE).

How It Works

The ESP_WiFi example shows how it works and should be used as the basis for a sketch that uses this library.
The concept of ESP_WiFi is that a new ESP32/ESP8266 WiFi will start a WiFi configuration portal when powered up, but has no valid stored Credentials or can't connect to WiFi APs after a pre-determined time.
There are 6 more custom parameters added in the sketch which you can use in your program later. In the example, they are: 2 sets of Blynk Servers and Tokens, Blynk Port and MQTT Server.
Using any WiFi enabled device with a browser (computer, phone, tablet) connect to the newly created AP and type in the configurable AP IP address (default 192.168.4.1). The Config Portal AP channel (default 10) is also configurable to avoid conflict with other APs.
The Config Portal is auto-adjusted to fix the 4 static parameters (WiFi SSIDs/PWDs) as well as 6 more dynamic custom parameters.
After the custom data entered, and Save button pressed, the configuration data will be saved in host's non-volatile memory, then the board reboots.
If there is valid stored Credentials, it'll go directly to connect to one of the MultiWiFi APs without starting / using the Config Portal.
ESP32/ESP8266 WiFi will try to connect. If successful, the dynamic DHCP and/or configured static IP address will be displayed in the configuration portal.
The ESP32/ESP8266 WiFi Config Portal network and Web Server will shutdown to return control to the sketch code.
In the operation, if the current WiFi connection is lost because of any reason, the system will auto(Re)connect to the remaining WiFi AP.
If system can't connect to any of the 2 WiFi APs, the Config Portal will start, after some pre-determined time, to permit user to update the Credentials.

How to use

1. Basic usage

Include in your sketch

// Must be before #include <ESP_WiFiManager_Lite.h>
#include <ESP_WiFiManager_Lite.h>

ESP_WiFiManager_Lite* ESP_WiFiManager;

2. Add custom parameters

To add custom parameters, just add

#include "defines.h"

// USE_DYNAMIC_PARAMETERS defined in defined.h

/////////////// Start dynamic Credentials ///////////////

//Defined in <ESP_WiFiManager_Lite.h>
/**************************************
  #define MAX_ID_LEN                5
  #define MAX_DISPLAY_NAME_LEN      16

  typedef struct
  {
    char id             [MAX_ID_LEN + 1];
    char displayName    [MAX_DISPLAY_NAME_LEN + 1];
    char *pdata;
    uint8_t maxlen;
  } MenuItem;
**************************************/

#if USE_DYNAMIC_PARAMETERS

#define MAX_BLYNK_SERVER_LEN      34
#define MAX_BLYNK_TOKEN_LEN       34

char Blynk_Server1 [MAX_BLYNK_SERVER_LEN + 1]  = "account.duckdns.org";
char Blynk_Token1  [MAX_BLYNK_TOKEN_LEN + 1]   = "token1";

char Blynk_Server2 [MAX_BLYNK_SERVER_LEN + 1]  = "account.ddns.net";
char Blynk_Token2  [MAX_BLYNK_TOKEN_LEN + 1]   = "token2";

#define MAX_BLYNK_PORT_LEN        6
char Blynk_Port   [MAX_BLYNK_PORT_LEN + 1]  = "8080";

#define MAX_MQTT_SERVER_LEN      34
char MQTT_Server  [MAX_MQTT_SERVER_LEN + 1]   = "mqtt.duckdns.org";

MenuItem myMenuItems [] =
{
  { "sv1", "Blynk Server1", Blynk_Server1,  MAX_BLYNK_SERVER_LEN },
  { "tk1", "Token1",        Blynk_Token1,   MAX_BLYNK_TOKEN_LEN },
  { "sv2", "Blynk Server2", Blynk_Server2,  MAX_BLYNK_SERVER_LEN },
  { "tk2", "Token2",        Blynk_Token2,   MAX_BLYNK_TOKEN_LEN },
  { "prt", "Port",          Blynk_Port,     MAX_BLYNK_PORT_LEN },
  { "mqt", "MQTT Server",   MQTT_Server,    MAX_MQTT_SERVER_LEN },
};

uint16_t NUM_MENU_ITEMS = sizeof(myMenuItems) / sizeof(MenuItem);  //MenuItemSize;

#else

MenuItem myMenuItems [] = {};

uint16_t NUM_MENU_ITEMS = 0;

#endif    //USE_DYNAMIC_PARAMETERS

3. Not using custom parameters

If you don't need to add dynamic parameters, use the following in sketch

#define USE_DYNAMIC_PARAMETERS      false

4. To open Config Portal

When you want to open a config portal, just add

ESP_WiFiManager = new ESP_WiFiManager_Lite();
ESP_WiFiManager->begin();

5. To use different AP WiFi Channel

To not use default AP WiFi Channel 10 to avoid conflict with other WiFi APs :

ESP_WiFiManager->setConfigPortalChannel(newChannel);

To use random AP WiFi Channel to avoid conflict with other WiFi APs :

ESP_WiFiManager->setConfigPortalChannel(0);

6. To use different static AP IP from default

To use different static AP IP (not use default 192.168.4.1), call

ESP_WiFiManager->setConfigPortalIP(IPAddress(xxx,xxx,xxx,xxx));

7. To use custom DHCP HostName

To set custom DHCP HostName :

// Set customized DHCP HostName
ESP_WiFiManager->begin("ESP32-WIFI_ABCDEF");

or just use the default Hostname, for example "ESP_ABCDEF"

//Or use default Hostname "ESPC_ABCDEF"
ESP_WiFiManager->begin();

8. To use custom HTML Style

const char NewCustomsStyle[] /*PROGMEM*/ = "<style>div,input{padding:5px;font-size:1em;}input{width:95%;}body{text-align: center;}\
button{background-color:blue;color:white;line-height:2.4rem;font-size:1.2rem;width:100%;}fieldset{border-radius:0.3rem;margin:0px;}</style>";

...

ESP_WiFiManager->setCustomsStyle(NewCustomsStyle);

9. To use custom Head Elements

ESP_WiFiManager->setCustomsHeadElement("<style>html{filter: invert(10%);}</style>");

10. To use CORS Header

ESP_WiFiManager->setCORSHeader("Your Access-Control-Allow-Origin");

While in AP mode, connect to it using its SSID (ESP_ABCDEF) / Password ("MyESP_ABCDEF"), then open a browser to the Portal AP IP, default 192.168.4.1, configure wifi then click Save. The Credentials / WiFi connection information will be saved in non-volatile memory. It will then autoconnect.

Once Credentials / WiFi network information is saved in the host non-volatile memory, it will try to autoconnect to WiFi every time it is started, without requiring any function calls in the sketch.

11. To use and input only one set of WiFi SSID and PWD

11.1 If you need to use and input only one set of WiFi SSID/PWD

// Permit input only one set of WiFi SSID/PWD. The other can be "NULL or "blank"
// Default is false (if not defined) => must input 2 sets of SSID/PWD
#define REQUIRE_ONE_SET_SSID_PW       true

But it's always advisable to use and input both sets for reliability.

11.2 If you need to use both sets of WiFi SSID/PWD

// Permit input only one set of WiFi SSID/PWD. The other can be "NULL or "blank"
// Default is false (if not defined) => must input 2 sets of SSID/PWD
#define REQUIRE_ONE_SET_SSID_PW       false

12. To enable auto-scan of WiFi networks for selection in Configuration Portal

12.1 Enable auto-scan of WiFi networks for selection in Configuration Portal

#define SCAN_WIFI_NETWORKS                  true

The manual input of SSIDs is default enabled, so that users can input arbitrary SSID, not only from the scanned list. This is for the sample use-cases in which users can input the known SSIDs of another place, then send the boards to that place. The boards can connect to WiFi without users entering Config Portal to re-configure.

12.2 Disable manually input SSIDs

// To disable manually input SSID, only from a scanned SSID lists
#define MANUAL_SSID_INPUT_ALLOWED           false

This is for normal use-cases in which users can only select an SSID from a scanned list of SSIDs to avoid typo mistakes and/or security.

12.3 Select maximum number of SSIDs in the list

The maximum number of SSIDs in the list is seletable from 2 to 15. If invalid number of SSIDs is selected, the default number of 10 will be used.

// From 2-15
#define MAX_SSID_IN_LIST                    8

13. To avoid blocking in loop when WiFi is lost

13.1 Max times to try WiFi per loop

To define max times to try WiFi per loop() iteration. To avoid blocking issue in loop()

Default is 1 if not defined, and minimum is forced to be 1.

To use, uncomment in defines.h.

Check retries block the main loop #18

#define MAX_NUM_WIFI_RECON_TRIES_PER_LOOP     2

13.2 Interval between reconnection WiFi if lost

Default is no interval between reconnection WiFi times if lost WiFi. Max permitted interval will be 10mins.

Uncomment to use. Be careful, WiFi reconnection will be delayed if using this method.

Only use whenever urgent tasks in loop() can't be delayed. But if so, it's better you have to rewrite your code, e.g. using higher priority tasks.

Check retries block the main loop #18

#define WIFI_RECON_INTERVAL                   30000     // 30s

14. Not using Board_Name on Config_Portal

Default is true. Just change to false to not using Board_Name on Config_Portal

https://github.com/khoih-prog/ESP_WiFiManager_Lite/blob/ce798e201dc1e895ca952ca212123b7091323a99/examples/ESP_WiFi/defines.h#L125-L130

Examples

So, how it works?

In Configuration Portal Mode, it starts an AP called ESP_ABCDEF. Connect to it using the configurable password you can define in the code. For example, MyESP_ABCDEF (see examples):

After you connected, please, go to http://192.168.4.1 or newly configured AP IP, you'll see this Main page:

Enter your credentials,

1. Without SCAN_WIFI_NETWORKS

Enter your credentials,

or

2. With SCAN_WIFI_NETWORKS

then click Save.

The WiFi Credentials will be saved and the board connect to the selected WiFi AP.

If you're already connected to a listed WiFi AP and don't want to change anything, just select Exit from the Main page to reboot the board and connect to the previously-stored AP. The WiFi Credentials are still intact.

Important Notes

Now you can use special chars such as ~, !, @, #, $, %, ^, &, _, -, space,etc. thanks to brondolin to provide the amazing fix in No save the char # at end of the wifi password to permit input special chars such as % and # into data fields.
The SSIDs, Passwords must be input (or to make them different from blank). Otherwise, the Config Portal will re-open until those fields have been changed. If you don't need any field, just input anything or use duplicated data from similar field.
WiFi password min length now is 8, max length is 63 chars according to WPA2 standard.

How to use default Credentials and have them pre-loaded onto Config Portal

See this example and modify as necessary

1. To always load Default Credentials and override Config Portal data

// Used mostly for development and debugging. FORCES default values to be loaded each run.
// Config Portal data input will be ignored and overridden by DEFAULT_CONFIG_DATA
bool LOAD_DEFAULT_CONFIG_DATA = true;

2. To load Default Credentials when there is no valid Credentials.

Config Portal data input will be override DEFAULT_CONFIG_DATA

// Used mostly once debugged. Assumes good data already saved in device.
// Config Portal data input will be override DEFAULT_CONFIG_DATA
bool LOAD_DEFAULT_CONFIG_DATA = false;

3. Example of Default Credentials

/// Start Default Config Data //////////////////

/*
#define SSID_MAX_LEN      32
//From v1.0.3, WPA2 passwords can be up to 63 characters long.
#define PASS_MAX_LEN      64

typedef struct
{
  char wifi_ssid[SSID_MAX_LEN];
  char wifi_pw  [PASS_MAX_LEN];
}  WiFi_Credentials;

#define NUM_WIFI_CREDENTIALS      2

// Configurable items besides fixed Header, just add board_name 
#define NUM_CONFIGURABLE_ITEMS    ( ( 2 * NUM_WIFI_CREDENTIALS ) + 1 )
////////////////

typedef struct Configuration
{
  char header         [16];
  WiFi_Credentials  WiFi_Creds  [NUM_WIFI_CREDENTIALS];
  char board_name     [24];
  int  checkSum;
} ESP_WM_LITE_Configuration;
*/

#define TO_LOAD_DEFAULT_CONFIG_DATA      false

#if TO_LOAD_DEFAULT_CONFIG_DATA

// This feature is primarily used in development to force a known set of values as Config Data
// It will NOT force the Config Portal to activate. Use DRD or erase Config Data with ESP_WiFiManager.clearConfigData()

// Used mostly for development and debugging. FORCES default values to be loaded each run.
// Config Portal data input will be ignored and overridden by DEFAULT_CONFIG_DATA
//bool LOAD_DEFAULT_CONFIG_DATA = true;

// Used mostly once debugged. Assumes good data already saved in device.
// Config Portal data input will be override DEFAULT_CONFIG_DATA
bool LOAD_DEFAULT_CONFIG_DATA = false;


ESP_WM_LITE_Configuration defaultConfig =
{
  //char header[16], dummy, not used
#if ESP8266 
  "ESP8266",
#else
  "ESP32",
#endif

  // WiFi_Credentials  WiFi_Creds  [NUM_WIFI_CREDENTIALS];
  // WiFi_Credentials.wifi_ssid and WiFi_Credentials.wifi_pw
  "SSID1",  "password1",
  "SSID2",  "password2",
  //char board_name     [24];

#if ESP8266 
  "ESP8266-Control",
#else
  "ESP32-Control",
#endif

  // terminate the list
  //int  checkSum, dummy, not used
  0
  /////////// End Default Config Data /////////////
};

#else

bool LOAD_DEFAULT_CONFIG_DATA = false;

ESP_WM_LITE_Configuration defaultConfig;

#endif    // TO_LOAD_DEFAULT_CONFIG_DATA

/////////// End Default Config Data /////////////

How to add dynamic parameters from sketch

Example of Default dynamicParams

To add custom parameters, just modify the example below

#include "defines.h"

// USE_DYNAMIC_PARAMETERS defined in defined.h

/////////////// Start dynamic Credentials ///////////////

//Defined in <ESP_WiFiManager_Lite.h>
/**************************************
  #define MAX_ID_LEN                5
  #define MAX_DISPLAY_NAME_LEN      16

  typedef struct
  {
  char id             [MAX_ID_LEN + 1];
  char displayName    [MAX_DISPLAY_NAME_LEN + 1];
  char *pdata;
  uint8_t maxlen;
  } MenuItem;
**************************************/

#if USE_DYNAMIC_PARAMETERS

#define MAX_BLYNK_SERVER_LEN      34
#define MAX_BLYNK_TOKEN_LEN       34

char Blynk_Server1 [MAX_BLYNK_SERVER_LEN + 1]  = "account.duckdns.org";
char Blynk_Token1  [MAX_BLYNK_TOKEN_LEN + 1]   = "token1";

char Blynk_Server2 [MAX_BLYNK_SERVER_LEN + 1]  = "account.ddns.net";
char Blynk_Token2  [MAX_BLYNK_TOKEN_LEN + 1]   = "token2";

#define MAX_BLYNK_PORT_LEN        6
char Blynk_Port   [MAX_BLYNK_PORT_LEN + 1]  = "8080";

#define MAX_MQTT_SERVER_LEN      34
char MQTT_Server  [MAX_MQTT_SERVER_LEN + 1]   = "mqtt.duckdns.org";

MenuItem myMenuItems [] =
{
  { "sv1", "Blynk Server1", Blynk_Server1,  MAX_BLYNK_SERVER_LEN },
  { "tk1", "Token1",        Blynk_Token1,   MAX_BLYNK_TOKEN_LEN },
  { "sv2", "Blynk Server2", Blynk_Server2,  MAX_BLYNK_SERVER_LEN },
  { "tk2", "Token2",        Blynk_Token2,   MAX_BLYNK_TOKEN_LEN },
  { "prt", "Port",          Blynk_Port,     MAX_BLYNK_PORT_LEN },
  { "mqt", "MQTT Server",   MQTT_Server,    MAX_MQTT_SERVER_LEN },
};

uint16_t NUM_MENU_ITEMS = sizeof(myMenuItems) / sizeof(MenuItem);  //MenuItemSize;

#else

MenuItem myMenuItems [] = {};

uint16_t NUM_MENU_ITEMS = 0;

#endif    //USE_DYNAMIC_PARAMETERS

If you don't need to add dynamic parameters, use the following in sketch

#define USE_DYNAMIC_PARAMETERS     false

or

/////////////// Start dynamic Credentials ///////////////

MenuItem myMenuItems [] = {};

uint16_t NUM_MENU_ITEMS = 0;
/////// // End dynamic Credentials ///////////

Important Notes for using Dynamic Parameters' ids

These ids (such as "mqtt" in example) must be unique.

Please be noted that the following reserved names are already used in library:

"id"    for WiFi SSID
"pw"    for WiFi PW
"id1"   for WiFi1 SSID
"pw1"   for WiFi1 PW
"nm"    for Board Name

Example ESP_WiFi

Please take a look at other examples, as well.

Debug Terminal output Samples

1. ESP_WiFi on ESP32_DEV

This is the terminal output when running ESP_WiFi example on ESP32_DEV:

1.1. MRD/DRD => Open Config Portal

Starting ESP_WiFi using LittleFS on ESP32_DEV
ESP_WiFiManager_Lite v1.10.5
ESP_MultiResetDetector v1.3.2
LittleFS Flag read = 0xFFFC0003
multiResetDetectorFlag = 0xFFFC0003
lowerBytes = 0x0003, upperBytes = 0x0003
multiResetDetected, number of times = 3
Saving config file...
Saving config file OK
[WML] Multi or Double Reset Detected
[WML] Hostname=ESP32-Controller
[WML] LoadCfgFile 
[WML] OK
[WML] ======= Start Stored Config Data =======
[WML] Hdr=ESP_WM_LITE,SSID=HueNet1,PW=12345678
[WML] SSID1=HueNet2,PW1=12345678
[WML] BName=ESP32_WM_Lite
[WML] i=0,id=sv1,data=account.duckdns.org
[WML] i=1,id=tk1,data=token1
[WML] i=2,id=sv2,data=account.ddns.net
[WML] i=3,id=tk2,data=token2
[WML] i=4,id=prt,data=8080
[WML] i=5,id=mqt,data=mqtt.duckdns.org
[WML] CCSum=0x137c,RCSum=0x137c
[WML] LoadCredFile 
[WML] CrR:pdata=new.duckdns.org,len=34
[WML] CrR:pdata=token1,len=34
[WML] CrR:pdata=new.ddns.net,len=34
[WML] CrR:pdata=token2,len=34
[WML] CrR:pdata=8080,len=6
[WML] CrR:pdata=mqtt.duckdns.org,len=34
[WML] OK
[WML] CrCCsum=0x163b,CrRCsum=0x163b
[WML] Valid Stored Dynamic Data
[WML] Hdr=ESP_WM_LITE,SSID=HueNet1,PW=12345678
[WML] SSID1=HueNet2,PW1=12345678
[WML] BName=ESP32_WM_Lite
[WML] i=0,id=sv1,data=new.duckdns.org
[WML] i=1,id=tk1,data=token1
[WML] i=2,id=sv2,data=new.ddns.net
[WML] i=3,id=tk2,data=token2
[WML] i=4,id=prt,data=8080
[WML] i=5,id=mqt,data=mqtt.duckdns.org
[WML] Check if isForcedCP
[WML] LoadCPFile 
[WML] OK
[WML] bg: isForcedConfigPortal = false
[WML] bg:Stay forever in CP:DRD/MRD
[WML] clearForcedCP
[WML] SaveCPFile 
[WML] OK
[WML] SaveBkUpCPFile 
[WML] OK
[WML] 
stConf:SSID=ESP_9ABF498,PW=MyESP_9ABF498
[WML] IP=192.168.4.1,ch=10
[WML] s:millis() = 1014, configTimeout = 121014
C
Your stored Credentials :
Blynk Server1 = new.duckdns.org
Token1 = token1
Blynk Server2 = new.ddns.net
Token2 = token2
Port = 8080
MQTT Server = mqtt.duckdns.org
CCCCCCCCC

1.2. Got valid Credentials from Config Portal then connected to WiFi

Starting ESP_WiFi using LittleFS on ESP32_DEV
ESP_WiFiManager_Lite v1.10.5
ESP_MultiResetDetector v1.3.2
LittleFS Flag read = 0xFFFE0001
multiResetDetectorFlag = 0xFFFE0001
lowerBytes = 0x0001, upperBytes = 0x0001
No multiResetDetected, number of times = 1
LittleFS Flag read = 0xFFFE0001
Saving config file...
Saving config file OK
[WML] LoadCfgFile 
[WML] OK
[WML] ======= Start Stored Config Data =======
[WML] Hdr=ESP_WM_LITE,SSID=HueNet1,PW=12345678
[WML] SSID1=HueNet2,PW1=12345678
[WML] BName=ESP32_WM_Lite
[WML] i=0,id=sv1,data=account.duckdns.org
[WML] i=1,id=tk1,data=token1
[WML] i=2,id=sv2,data=account.ddns.net
[WML] i=3,id=tk2,data=token2
[WML] i=4,id=prt,data=8080
[WML] i=5,id=mqt,data=mqtt.duckdns.org
[WML] LoadCredFile 
[WML] OK
[WML] Valid Stored Dynamic Data
[WML] Hdr=ESP_WM_LITE,SSID=HueNet1,PW=12345678
[WML] SSID1=HueNet2,PW1=12345678
[WML] BName=ESP32_WM_Lite
[WML] i=0,id=sv1,data=new.duckdns.org
[WML] i=1,id=tk1,data=token1
[WML] i=2,id=sv2,data=new.ddns.net
[WML] i=3,id=tk2,data=token2
[WML] i=4,id=prt,data=8080
[WML] i=5,id=mqt,data=mqtt.duckdns.org
[WML] LoadCPFile 
[WML] OK
H
Your stored Credentials :
Blynk Server1 = new.duckdns.org
Token1 = token1
Blynk Server2 = new.ddns.net
Token2 = token2
Port = 8080
MQTT Server = mqtt.duckdns.org
Stop multiResetDetecting
Saving config file...
Saving config file OK
HHHHHHHHH HHHHHHHHHH HHHHHHHHHH HHHHHHHHHH HHHHHHHHHH HHHHHHHHHH HHHHH

1.3. Lost a WiFi and autoconnect to another WiFi AP

[WML] run: WiFi lost. Reconnect WiFi
[WML] Connecting MultiWifi...
[WML] WiFi connected after time: 2
[WML] SSID=HueNet2,RSSI=-54
[WML] Channel=4,IP=192.168.2.82
[WML] run: WiFi reconnected
H
HHHHHHHHHH HHHHHHHHHH

2. ESP_WiFi_MQTT on ESP8266_NODEMCU

This is the terminal output when running ESP_WiFi_MQTT example on ESP8266_NODEMCU:

2.1. No Config Data => Open Config Portal

Starting ESP_WiFi_MQTT using LittleFS on ESP8266_NODEMCU
ESP_WiFiManager_Lite v1.10.5
ESP_MultiResetDetector v1.3.2
LittleFS Flag read = 0xFFFE0001
multiResetDetectorFlag = 0xFFFE0001
lowerBytes = 0x0001, upperBytes = 0x0001
No multiResetDetected, number of times = 1
LittleFS Flag read = 0xFFFE0001
Saving config file...
Saving config file OK
[WML] Hostname=ESP8266-Controller
[WML] LoadCfgFile 
[WML] OK
[WML] ======= Start Stored Config Data =======
[WML] Hdr=ESP_WM_LITE,SSID=HueNet1,PW=12345678
[WML] SSID1=HueNet2,PW1=12345678
[WML] BName=ESP8266_WM_Lite
[WML] i=0,id=svr,data=io.adafruit.com
[WML] i=1,id=prt,data=1883
[WML] i=2,id=usr,data=private
[WML] i=3,id=key,data=private
[WML] i=4,id=pub,data=/feeds/Temperature
[WML] i=5,id=sub,data=/feeds/LED_Control
[WML] LoadCredFile 
[WML] OK
[WML] Invalid Stored Dynamic Data. Ignored
[WML] InitCfgFile,sz=236
[WML] SaveCfgFile 
[WML] WCSum=0xda0
[WML] OK
[WML] SaveBkUpCfgFile 
[WML] OK
[WML] SaveCredFile 
[WML] OK
[WML] CrWCSum=0xc30
[WML] SaveBkUpCredFile 
[WML] OK
[WML] LoadCPFile 
[WML] OK
[WML] bg:Stay forever in CP:No ConfigDat
[WML] SaveCPFile 
[WML] OK
[WML] SaveBkUpCPFile 
[WML] OK
C
Your stored Credentials :
AIO_SERVER = blank
AIO_SERVERPORT = blank
AIO_USERNAME = blank
AIO_KEY = blank
AIO_PUB_TOPIC = blank
AIO_SUB_TOPIC = blank
NStop multiResetDetecting
Saving config file...
Saving config file OK
CCC

2.2. Got valid Credentials from Config Portal then connected to WiFi

[WML] h:UpdLittleFS
[WML] SaveCfgFile 
[WML] WCSum=0x13a5
[WML] OK
[WML] SaveBkUpCfgFile 
[WML] OK
[WML] SaveCredFile 
[WML] OK
[WML] CrWCSum=0x2236
[WML] SaveBkUpCredFile 
[WML] OK
[WML] h:Rst
...

Starting ESP_WiFi_MQTT using LittleFS on ESP8266_NODEMCU
ESP_WiFiManager_Lite v1.10.5
ESP_MultiResetDetector v1.3.2
LittleFS Flag read = 0xFFFE0001
multiResetDetectorFlag = 0xFFFE0001
lowerBytes = 0x0001, upperBytes = 0x0001
No multiResetDetected, number of times = 1
LittleFS Flag read = 0xFFFE0001
Saving config file...
Saving config file OK
[WML] Hostname=ESP8266-Controller
[WML] LoadCfgFile 
[WML] OK
[WML] ======= Start Stored Config Data =======
[WML] Hdr=ESP_WM_LITE,SSID=HueNet1,PW=12345678
[WML] SSID1=HueNet2,PW1=12345678
[WML] BName=ESP8266_WM_MQTT
[WML] i=0,id=svr,data=io.adafruit.com
[WML] i=1,id=prt,data=1883
[WML] i=2,id=usr,data=private
[WML] i=3,id=key,data=private
[WML] i=4,id=pub,data=/feeds/Temperature
[WML] i=5,id=sub,data=/feeds/LED_Control
[WML] LoadCredFile 
[WML] OK
[WML] Valid Stored Dynamic Data
[WML] Hdr=ESP_WM_LITE,SSID=HueNet1,PW=12345678
[WML] SSID1=HueNet2,PW1=12345678
[WML] BName=ESP8266_WM_MQTT
[WML] i=0,id=svr,data=io.adafruit.com
[WML] i=1,id=prt,data=1883
[WML] i=2,id=usr,data=user_name
[WML] i=3,id=key,data=aio_key
[WML] i=4,id=pub,data=/feeds/Temperature
[WML] i=5,id=sub,data=/feeds/LED_Control
[WML] LoadCPFile 
[WML] OK
[WML] Connecting MultiWifi...
[WML] WiFi connected after time: 1
[WML] SSID=HueNet1,RSSI=-43
[WML] Channel=2,IP=192.168.2.98
[WML] bg: WiFi OK.

Creating new WiFi client object OK
Creating new MQTT object OK
AIO_SERVER = io.adafruit.com, AIO_SERVERPORT = 1883
AIO_USERNAME = user_name, AIO_KEY = aio_key
Creating new MQTT_Pub_Topic, Temperature = user_name/feeds/Temperature
Creating new Temperature object OK
Temperature MQTT_Pub_Topic = user_name/feeds/Temperature
Creating new AIO_SUB_TOPIC, LED_Control = user_name/feeds/LED_Control
Creating new LED_Control object OK
LED_Control AIO_SUB_TOPIC = user_name/feeds/LED_Control

Connecting to WiFi MQTT (3 attempts)...
WiFi MQTT connection successful!
TW
Your stored Credentials :
AIO_SERVER = io.adafruit.com
AIO_SERVERPORT = 1883
AIO_USERNAME = user_name
AIO_KEY = aio_key
AIO_PUB_TOPIC = /feeds/Temperature
AIO_SUB_TOPIC = /feeds/LED_Control
Stop multiResetDetecting
Saving config file...
Saving config file OK
TWTWTWTW TW

2.3. Lost a WiFi and autoconnect to another WiFi AP

[WML] run: WiFi lost. Reconnect WiFi
[WML] Connecting MultiWifi...
[WML] WiFi connected after time: 1
[WML] SSID=HueNet2,RSSI=-54
[WML] Channel=4,IP=192.168.2.98
[WML] run: WiFi reconnected
H

3. ESP_WiFi_MQTT on ESP32S2_DEV

This is the terminal output when running ESP_WiFi_MQTT example on ESP32S2_DEV:

3.1. No Config Data => Open Config Portal

Starting ESP_WiFi_MQTT using LittleFS on ESP32S2_DEV
ESP_WiFiManager_Lite v1.10.5
ESP_MultiResetDetector v1.3.2
LittleFS Flag read = 0xFFFE0001
multiResetDetectorFlag = 0xFFFE0001
lowerBytes = 0x0001, upperBytes = 0x0001
No multiResetDetected, number of times = 1
LittleFS Flag read = 0xFFFE0001
Saving config file...
Saving config file OK
[WML] Hostname=ESP32-Controller
[WML] Check if isForcedCP
[WML] LoadCPFile 
[WML] OK
[WML] bg: isForcedConfigPortal = false
[WML] bg:Stay forever in CP:No ConfigDat
[WML] clearForcedCP
[WML] SaveCPFile 
[WML] OK
[WML] SaveBkUpCPFile 
[WML] OK
[WML] 
stConf:SSID=ESP_8A1DF7C,PW=MyESP_8A1DF7C
[WML] IP=192.168.4.1,ch=1
[WML] s:configTimeout = 0
C
Your stored Credentials :
AIO_SERVER = io.adafruit.com
AIO_SERVERPORT = 1883
AIO_USERNAME = private
AIO_KEY = private
AIO_PUB_TOPIC = /feeds/Temperature
AIO_SUB_TOPIC = /feeds/LED_Control
NStop multiResetDetecting
Saving config file...
Saving config file OK
CCC C

3.2. Got valid Credentials from Config Portal then connected to WiFi

[WML] h: Init menuItemUpdated
[WML] h:repl id
[WML] h:items updated =1
[WML] h:key =id, value =HueNet1
[WML] h:repl pw
[WML] h:items updated =2
[WML] h:key =pw, value =12345678
[WML] h:repl id1
[WML] h:items updated =3
[WML] h:key =id1, value =HueNet2
[WML] h:repl pw1
[WML] h:items updated =4
[WML] h:key =pw1, value =12345678
[WML] h:repl nm
[WML] h:items updated =5
[WML] h:key =nm, value =ESP32_S2
[WML] h:svr=io.adafruit.com
[WML] h:items updated =6
[WML] h:key =svr, value =io.adafruit.com
[WML] h:prt=1883
[WML] h:items updated =7
[WML] h:key =prt, value =1883
[WML] h:usr=user_name
[WML] h:items updated =8
[WML] h:key =usr, value =user_name
[WML] h:key=aio_key
[WML] h:items updated =9
[WML] h:key =key, value =aio_key
[WML] h:pub=/feeds/Temperature
[WML] h:items updated =10
[WML] h:key =pub, value =/feeds/Temperature
[WML] h:sub=/feeds/LED_Control
[WML] h:items updated =11
[WML] h:key =sub, value =/feeds/LED_Control
[WML] h:UpdLittleFS
[WML] SaveCfgFile 
[WML] WCSum=0x1170
[WML] OK
[WML] SaveBkUpCfgFile 
[WML] OK
[WML] SaveCredFile 
[WML] CW1:pdata=io.adafruit.com,len=20
[WML] CW1:pdata=1883,len=6
[WML] CW1:pdata=user_name,len=20
[WML] CW1:pdata=aio_key,len=40
[WML] CW1:pdata=/feeds/Temperature,len=40
[WML] CW1:pdata=/feeds/LED_Control,len=40
[WML] OK
[WML] CrWCSum=0x2236
[WML] SaveBkUpCredFile 
[WML] CW2:pdata=io.adafruit.com,len=20
[WML] CW2:pdata=1883,len=6
[WML] CW2:pdata=user_name,len=20
[WML] CW2:pdata=aio_key,len=40
[WML] CW2:pdata=/feeds/Temperature,len=40
[WML] CW2:pdata=/feeds/LED_Control,len=40
[WML] OK
[WML] h:Rst
ESP-ROM:esp32s2-rc4-20191025
Build:Oct 25 2019
rst:0x3 (RTC_SW_SYS_RST),boot:0x8 (SPI_FAST_FLASH_BOOT)
Saved PC:0x40025f35
SPIWP:0xee
mode:DIO, clock div:1
load:0x3ffe6100,len:0x8
load:0x3ffe6108,len:0x608
load:0x4004c000,len:0xa38
load:0x40050000,len:0x2848
entry 0x4004c190
...

Starting ESP_WiFi_MQTT using LittleFS on ESP32S2_DEV
ESP_WiFiManager_Lite v1.10.5
ESP_MultiResetDetector v1.3.2
LittleFS Flag read = 0xFFFE0001
multiResetDetectorFlag = 0xFFFE0001
lowerBytes = 0x0001, upperBytes = 0x0001
No multiResetDetected, number of times = 1
LittleFS Flag read = 0xFFFE0001
Saving config file...
Saving config file OK
[WML] Hostname=ESP32-Controller
[WML] LoadCfgFile 
[WML] OK
[WML] ======= Start Stored Config Data =======
[WML] Hdr=ESP_WM_LITE,SSID=HueNet1,PW=12345678
[WML] SSID1=HueNet2,PW1=12345678
[WML] BName=ESP32_S2
[WML] i=0,id=svr,data=io.adafruit.com
[WML] i=1,id=prt,data=1883
[WML] i=2,id=usr,data=private
[WML] i=3,id=key,data=private
[WML] i=4,id=pub,data=/feeds/Temperature
[WML] i=5,id=sub,data=/feeds/LED_Control
[WML] CCSum=0x1170,RCSum=0x1170
[WML] LoadCredFile 
[WML] CrR:pdata=io.adafruit.com,len=20
[WML] CrR:pdata=1883,len=6
[WML] CrR:pdata=user_name,len=20
[WML] CrR:pdata=aio_key,len=40
[WML] CrR:pdata=/feeds/Temperature,len=40
[WML] CrR:pdata=/feeds/LED_Control,len=40
[WML] OK
[WML] CrCCsum=0x2236,CrRCsum=0x2236
[WML] Valid Stored Dynamic Data
[WML] Hdr=ESP_WM_LITE,SSID=HueNet1,PW=12345678
[WML] SSID1=HueNet2,PW1=12345678
[WML] BName=ESP32_S2
[WML] i=0,id=svr,data=io.adafruit.com
[WML] i=1,id=prt,data=1883
[WML] i=2,id=usr,data=user_name
[WML] i=3,id=key,data=aio_key
[WML] i=4,id=pub,data=/feeds/Temperature
[WML] i=5,id=sub,data=/feeds/LED_Control
[WML] Check if isForcedCP
[WML] LoadCPFile 
[WML] OK
[WML] bg: noConfigPortal = true
[WML] Connecting MultiWifi...
[WML] WiFi connected after time: 1
[WML] SSID=HueNet1,RSSI=-19
[WML] Channel=2,IP=192.168.2.116
[WML] bg: WiFi OK.
Stop multiResetDetecting
Saving config file...
Saving config file OK

Creating new WiFi client object OK
Creating new MQTT object OK
AIO_SERVER = io.adafruit.com, AIO_SERVERPORT = 1883
AIO_USERNAME = user_name, AIO_KEY = aio_key
Creating new MQTT_Pub_Topic, Temperature = user_name/feeds/Temperature
Creating new Temperature object OK
Temperature MQTT_Pub_Topic = user_name/feeds/Temperature
Creating new AIO_SUB_TOPIC, LED_Control = user_name/feeds/LED_Control
Creating new LED_Control object OK
LED_Control AIO_SUB_TOPIC = user_name/feeds/LED_Control

Connecting to WiFi MQTT (3 attempts)...
WiFi MQTT connection successful!
TW
Your stored Credentials :
AIO_SERVER = io.adafruit.com
AIO_SERVERPORT = 1883
AIO_USERNAME = user_name
AIO_KEY = aio_key
AIO_PUB_TOPIC = /feeds/Temperature
AIO_SUB_TOPIC = /feeds/LED_Control
TWTWTWTW TW

3.3. Lost a WiFi and autoconnect to another WiFi AP

[WML] run: WiFi lost. Reconnect WiFi
[WML] Connecting MultiWifi...
[WML] WiFi connected after time: 1
[WML] SSID=HueNet2,RSSI=-54
[WML] Channel=4,IP=192.168.2.116
[WML] run: WiFi reconnected
H

4. ESP_WiFi_MQTT on ESP32S2_DEV to demo MultiResetDetector

This is the terminal output when running ESP_WiFi_MQTT example on ESP32S2_DEV

4.1. MultiResetDetected => Open Config Portal

Starting ESP_WiFi_MQTT using LittleFS on ESP32S2_DEV
ESP_WiFiManager_Lite v1.10.5
ESP_MultiResetDetector v1.3.2
LittleFS Flag read = 0xFFFC0003
multiResetDetectorFlag = 0xFFFC0003
lowerBytes = 0x0003, upperBytes = 0x0003
multiResetDetected, number of times = 3
Saving config file...
Saving config file OK
[WML] 
stConf:SSID=ESP_8A1DF7C,PW=MyESP_8A1DF7C
[WML] IP=192.168.4.1,ch=3
C
Your stored Credentials :
AIO_SERVER = io.adafruit.com
AIO_SERVERPORT = 1883
AIO_USERNAME = private
AIO_KEY = private
AIO_PUB_TOPIC = /feeds/Temperature
AIO_SUB_TOPIC = /feeds/LED_Control
NNNN NNNNN NNNNN NNNNN NN[WML] h:UpdLittleFS
[WML] h:Rst

4.2. Got valid Credentials from Config Portal then connected to WiFi

Starting ESP_WiFi_MQTT using LittleFS on ESP32S2_DEV
ESP_WiFiManager_Lite v1.10.5
ESP_MultiResetDetector v1.3.2
LittleFS Flag read = 0xFFFE0001
multiResetDetectorFlag = 0xFFFE0001
lowerBytes = 0x0001, upperBytes = 0x0001
No multiResetDetected, number of times = 1
LittleFS Flag read = 0xFFFE0001
Saving config file...
Saving config file OK
[WML] Hdr=ESP_WM_LITE,SSID=HueNet1,PW=12345678
[WML] SSID1=HueNet2,PW1=12345678
[WML] BName=ESP32-S2
[WML] Hdr=ESP_WM_LITE,SSID=HueNet1,PW=12345678
[WML] SSID1=HueNet2,PW1=12345678
[WML] BName=ESP32-S2
[WML] WiFi connected after time: 1
[WML] SSID=HueNet1,RSSI=-41
[WML] Channel=2,IP=192.168.2.157
Stop multiResetDetecting
Saving config file...
Saving config file OK

Creating new WiFi client object OK
Creating new MQTT object OK
AIO_SERVER = io.adafruit.com, AIO_SERVERPORT = 1883
AIO_USERNAME = user_name, AIO_KEY = aio_key
Creating new MQTT_Pub_Topic, Temperature = user_name/feeds/Temperature
Creating new Temperature object OK
Temperature MQTT_Pub_Topic = user_name/feeds/Temperature
Creating new AIO_SUB_TOPIC, LED_Control = user_name/feeds/LED_Control
Creating new LED_Control object OK
LED_Control AIO_SUB_TOPIC = user_name/feeds/LED_Control

Connecting to WiFi MQTT (3 attempts)...
WiFi MQTT connection successful!
TW
Your stored Credentials :
AIO_SERVER = io.adafruit.com
AIO_SERVERPORT = 1883
AIO_USERNAME = user_name
AIO_KEY = aio_key
AIO_PUB_TOPIC = /feeds/Temperature
AIO_SUB_TOPIC = /feeds/LED_Control
TWTWTWTW TWTWTWTWTW TWTW

5. ESP_WiFi_MQTT on ESP32_DEV to demo WiFi Scan

This is the terminal output when running ESP_WiFi example on ESP32_DEV with WiFi Scan for selection in Configuration Portal

5.1 MRD/DRD => Open Config Portal

Starting ESP_WiFi_MQTT using LittleFS on ESP32_DEV
ESP_WiFiManager_Lite v1.10.5
ESP_MultiResetDetector v1.3.2
LittleFS Flag read = 0xFFFC0003
multiResetDetectorFlag = 0xFFFC0003
lowerBytes = 0x0003, upperBytes = 0x0003
multiResetDetected, number of times = 3
Saving config file...
Saving config file OK
[WML] Hdr=ESP_WM_LITE,SSID=HueNet1,PW=12345678
[WML] SSID1=HueNet2,PW1=12345678
[WML] BName=ESP32_DEV
[WML] Hdr=ESP_WM_LITE,SSID=HueNet1,PW=12345678
[WML] SSID1=HueNet2,PW1=12345678
[WML] BName=ESP32_DEV
[WML] WiFi networks found:
[WML] 1: HueNet, -24dB
[WML] 2: HueNet1, -31dB
[WML] 3: HueNetTek, -33dB
[WML] 4: dragino-1ed63c, -33dB
[WML] 5: HueNet2, -57dB
[WML] 6: bacau, -72dB
[WML] 7: guest_24, -72dB
[WML] 8: Waterhome, -91dB
[WML] 9: BAHFAMILY, -93dB
[WML] 10: TP-LINK_2.4GHz_9A67ED, -94dB
[WML] 11: Access 2.0, -96dB
[WML] 
stConf:SSID=ESP_9ABF498,PW=MyESP_9ABF498
[WML] IP=192.168.4.1,ch=11
C
Your stored Credentials :
AIO_SERVER = io.adafruit.com
AIO_SERVERPORT = 1883
AIO_USERNAME = private
AIO_KEY = private
AIO_PUB_TOPIC = /feeds/Temperature
AIO_SUB_TOPIC = /feeds/LED_Control
CCC

5.2 Config Data Saved => Connection to Adafruit MQTT

Starting ESP_WiFi_MQTT using LittleFS on ESP32_DEV
ESP_WiFiManager_Lite v1.10.5
ESP_MultiResetDetector v1.3.2
LittleFS Flag read = 0xFFFE0001
multiResetDetectorFlag = 0xFFFE0001
lowerBytes = 0x0001, upperBytes = 0x0001
No multiResetDetected, number of times = 1
LittleFS Flag read = 0xFFFE0001
Saving config file...
Saving config file OK
[WML] Hdr=ESP_WM_LITE,SSID=HueNet1,PW=12345678
[WML] SSID1=HueNet2,PW1=12345678
[WML] BName=ESP32_DEV
[WML] Hdr=ESP_WM_LITE,SSID=HueNet1,PW=12345678
[WML] SSID1=HueNet2,PW1=12345678
[WML] BName=ESP32_DEV
[WML] WiFi connected after time: 1
[WML] SSID=HueNet1,RSSI=-30
[WML] Channel=2,IP=192.168.2.45
Stop multiResetDetecting
Saving config file...
Saving config file OK

Creating new WiFi client object OK
Creating new MQTT object OK
AIO_SERVER = io.adafruit.com, AIO_SERVERPORT = 1883
AIO_USERNAME = user_name, AIO_KEY = aio_key
Creating new MQTT_Pub_Topic, Temperature = user_name/feeds/Temperature
Creating new Temperature object OK
Temperature MQTT_Pub_Topic = user_name/feeds/Temperature
Creating new AIO_SUB_TOPIC, LED_Control = user_name/feeds/LED_Control
Creating new LED_Control object OK
LED_Control AIO_SUB_TOPIC = user_name/feeds/LED_Control

Connecting to WiFi MQTT (3 attempts)...
WiFi MQTT connection successful!
TWTWTWTW TWTW

6. ESP_WiFi on ESP32S3_DEV

This is the terminal output when running ESP_WiFi example on ESP32S3_DEV

Starting ESP_WiFi using LittleFS on ESP32S3_DEV
ESP_WiFiManager_Lite v1.10.5
ESP_MultiResetDetector v1.3.2
LittleFS Flag read = 0xFFFE0001
multiResetDetectorFlag = 0xFFFE0001
lowerBytes = 0x0001, upperBytes = 0x0001
No multiResetDetected, number of times = 1
LittleFS Flag read = 0xFFFE0001
Saving config file...
Saving config file OK
[WML] Hdr=ESP_WM_LITE,SSID=HueNet1,PW=password
[WML] SSID1=HueNet2,PW1=password
[WML] BName=ESP32_S3
[WML] Hdr=ESP_WM_LITE,SSID=HueNet1,PW=password
[WML] SSID1=HueNet2,PW1=password
[WML] BName=ESP32_S3
[WML] WiFi connected after time: 0
[WML] SSID=HueNet1,RSSI=-23
[WML] Channel=2,IP=192.168.2.83
H
Your stored Credentials :
Blynk Server1 = account.duckdns.org
Token1 = token1
Blynk Server2 = account.ddns.net
Token2 = token2
Port = 8080
MQTT Server = mqtt.duckdns.org
Stop multiResetDetecting
Saving config file...
Saving config file OK
HHH

7. ESP_WiFi on ESP32C3_DEV using LittleFS

This is the terminal output when running ESP_WiFi example on ESP32C3_DEV using LittleFS

Starting ESP_WiFi using LittleFS on ESP32C3_DEV
ESP_WiFiManager_Lite v1.10.5
ESP_MultiResetDetector v1.3.2
LittleFS Flag read = 0xFFFE0001
multiResetDetectorFlag = 0xFFFE0001
lowerBytes = 0x0001, upperBytes = 0x0001
No multiResetDetected, number of times = 1
LittleFS Flag read = 0xFFFE0001
Saving config file...
Saving config file OK
[WML] Hdr=ESP_WM_LITE,SSID=HueNet1,PW=password
[WML] SSID1=HueNet2,PW1=password
[WML] BName=ESP32_C3
[WML] Hdr=ESP_WM_LITE,SSID=HueNet1,PW=password
[WML] SSID1=HueNet2,PW1=password
[WML] BName=ESP32_C3
[WML] WiFi connected after time: 0
[WML] SSID=HueNet1,RSSI=-21
[WML] Channel=2,IP=192.168.2.85
H
Your stored Credentials :
Blynk Server1 = account.duckdns.org
Token1 = token1
Blynk Server2 = account.ddns.net
Token2 = token2
Port = 8080
MQTT Server = mqtt.duckdns.org
Stop multiResetDetecting
Saving config file...
Saving config file OK
HHH

Debug

Debug is enabled by default on Serial. To disable, add at the beginning of sketch

/* Comment this out to disable prints and save space */
#define ESP_WM_LITE_DEBUG_OUTPUT      Serial

#define _ESP_WM_LITE_LOGLEVEL_        3

#define USING_MRD                     true

#if USING_MRD
  #define MULTIRESETDETECTOR_DEBUG      true
#else
  #define DOUBLERESETDETECTOR_DEBUG     true
#endif

Troubleshooting

If you get compilation errors, more often than not, you may need to install a newer version of the board's core or this library version.

Issues

Submit issues to: ESP_WiFiManager_Lite issues

TO DO

Support more boards, shields and libraries
Bug Searching and Killing

DONE

Permit EEPROM size and location configurable to avoid conflict with others.
More flexible to configure reconnection timeout.
For fresh config data, don't need to wait for connecting timeout before entering config portal.
If the config data not entered completely (SSIDs, Passwords, etc.), entering config portal
Add configurable Config Portal IP, SSID and Password
Change Synch XMLHttpRequest to Async
Add configurable Static IP, GW, Subnet Mask and 2 DNS Servers' IP Addresses.
Add checksums
Add support to ESP32 including ESP32-S2 (ESP32-S2 Saola, AI-Thinker ESP-12K, etc.) and ESP8266
Add MultiWiFi features with auto(re)connect
Easy-to-use Dynamic Parameters without the necessity to write complicated ArduinoJSon functions
Permit to input special chars such as % and # into data fields.
Default Credentials and dynamic parameters
Multi/DoubleDetectDetector to force Config Portal when multi/double reset is detected within predetermined time, default 10s.
Configurable Config Portal Title
Re-structure all examples to separate Credentials / Defines / Dynamic Params / Code so that you can change Credentials / Dynamic Params quickly for each device.
Add Table of Contents and Version String
Configurable Customs HTML Headers, including Customs Style, Customs Head Elements, CORS Header
Permit optionally inputting one set of WiFi SSID/PWD by using REQUIRE_ONE_SET_SSID_PW == true
Enforce WiFi PWD minimum length of 8 chars
Add support to ESP32-S2 (ESP32-S2 Saola, AI-Thinker ESP-12K, etc.) using EEPROM, LittleFS and SPIFFS
Configurable Customs HTML Headers, including Customs Style, Customs Head Elements, CORS Header
Add support to ESP32-C3 using EEPROM and SPIFFS
Enable scan of WiFi networks for selection in Configuration Portal
Ready for ESP32 core v2.0.0+
Fix ESP8266 bug not easy to connect to Config Portal for ESP8266 core v3.0.0+
Fix the blocking issue in loop() with configurable WIFI_RECON_INTERVAL
Add support to ESP32-S3 (ESP32S3_DEV, ESP32_S3_BOX, UM TINYS3, UM PROS3, UM FEATHERS3, etc.) using EEPROM, SPIFFS or LittleFS
Add LittleFS support to ESP32-C3
Use ESP32-core's LittleFS library instead of Lorol's LITTLEFS library for ESP32 core v2.0.0+
Optimize code by passing by reference instead of value
Optional Board_Name in Config Portal
Add function isConfigMode() to signal system is in Config Portal mode
Fix ESP32 chipID
Add ESP32 getChipID() and getChipOUI() functions
Add Captive-Portal feature. Check Captive portal #24
Add option to not USE_LED_BUILTIN for Config-Portal. Check added switch to turn use of builtin LED off #20
Add public methods to load and save dynamic data
Add Config Portal scaling support to mobile devices
Using PROGMEM for HTML strings. Check move HTML char* into PROGMEM #35
Using PROGMEM for strings in examples. Check Example fixes #37
Improve README.md so that links can be used in other sites, such as PIO

Contributions and Thanks

Please help contribute to this project and add your name here.

Thanks to Michael H. "bizprof". With the impressive new feature :

Enable scan of WiFi networks for selection in Configuration Portal. Check PR for v1.3.0 - Enable scan of WiFi networks #10 leading to v1.5.0

Thanks to Holger Müller for creating the following merged PRs leading to many new versions

_{⭐️⭐️ Michael H. "bizprof"}

_{⭐️⭐️ Holger Müller}

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

The library is licensed under MIT

Name		Name	Last commit message	Last commit date
Latest commit History 145 Commits
.github		.github
esp32s2_WebServer_Patch		esp32s2_WebServer_Patch
examples		examples
pics		pics
platformio		platformio
src		src
utils		utils
.codespellrc		.codespellrc
.gitignore		.gitignore
CONTRIBUTING.md		CONTRIBUTING.md
LICENSE		LICENSE
README.md		README.md
changelog.md		changelog.md
keywords.txt		keywords.txt
library.json		library.json
library.properties		library.properties