## ESP_DoubleResetDetector Library

[![arduino-library-badge](https://www.ardu-badge.com/badge/ESP_DoubleResetDetector.svg?)](https://www.ardu-badge.com/ESP_DoubleResetDetector)
[![GitHub release](https://img.shields.io/github/release/khoih-prog/ESP_DoubleResetDetector.svg)](https://github.com/khoih-prog/ESP_DoubleResetDetector/releases)
[![GitHub](https://img.shields.io/github/license/mashape/apistatus.svg)](https://github.com/khoih-prog/ESP_DoubleResetDetector/blob/master/LICENSE)
[![contributions welcome](https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat)](#Contributing)
[![GitHub issues](https://img.shields.io/github/issues/khoih-prog/ESP_DoubleResetDetector.svg)](http://github.com/khoih-prog/ESP_DoubleResetDetector/issues)


<a href="https://www.buymeacoffee.com/khoihprog6" title="Donate to my libraries using BuyMeACoffee"><img src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png" alt="Donate to my libraries using BuyMeACoffee" style="height: 50px !important;width: 181px !important;" ></a>
<a href="https://www.buymeacoffee.com/khoihprog6" title="Donate to my libraries using BuyMeACoffee"><img src="https://img.shields.io/badge/buy%20me%20a%20coffee-donate-orange.svg?logo=buy-me-a-coffee&logoColor=FFDD00" style="height: 20px !important;width: 200px !important;" ></a>

---
---

## Table of Contents

* [Why do we need this ESP_DoubleResetDetector library](#why-do-we-need-this-esp_doubleresetdetector-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)
* [HOWTO Usage](#howto-usage)
* [Examples](#examples)
  * [ 1. ConfigOnDoubleReset](examples/ConfigOnDoubleReset)
  * [ 2. ConfigOnDRD_ESP32_minimal](examples/ConfigOnDRD_ESP32_minimal)
  * [ 3. ConfigOnDRD_ESP8266_minimal](examples/ConfigOnDRD_ESP8266_minimal)
  * [ 4. minimal](examples/minimal)
  * [ 5. checkWaitingDRD](examples/checkWaitingDRD) **New**
 * [Examples from other libraries](#examples-from-other-libraries)
  * [ 1. ESP_WiFiManager Library](https://github.com/khoih-prog/ESP_WiFiManager)
    * [ 1. ConfigOnDoubleReset](https://github.com/khoih-prog/ESP_WiFiManager/tree/master/examples/ConfigOnDoubleReset)
    * [ 2. ConfigOnDRD_FS_MQTT_Ptr](https://github.com/khoih-prog/ESP_WiFiManager/tree/master/examples/ConfigOnDRD_FS_MQTT_Ptr)
    * [ 3. ESP32_FSWebServer_DRD](https://github.com/khoih-prog/ESP_WiFiManager/tree/master/examples/ESP32_FSWebServer_DRD)
    * [ 4. ESP_FSWebServer_DRD](https://github.com/khoih-prog/ESP_WiFiManager/tree/master/examples/ESP_FSWebServer_DRD)
    * [ 5. ConfigOnDRD_ESP32_minimal](https://github.com/khoih-prog/ESP_WiFiManager/tree/master/examples/ConfigOnDRD_ESP32_minimal)
    * [ 6. ConfigOnDRD_ESP8266_minimal](https://github.com/khoih-prog/ESP_WiFiManager/tree/master/examples/ConfigOnDRD_ESP8266_minimal)
    * [ 7. ConfigOnDRD_FS_MQTT_Ptr_Complex](https://github.com/khoih-prog/ESP_WiFiManager/tree/master/examples/ConfigOnDRD_FS_MQTT_Ptr_Complex)
    * [ 8. ConfigOnDRD_FS_MQTT_Ptr_Medium](https://github.com/khoih-prog/ESP_WiFiManager/tree/master/examples/ConfigOnDRD_FS_MQTT_Ptr_Medium)
  * [ 2. ESPAsync_WiFiManager Library](https://github.com/khoih-prog/ESPAsync_WiFiManager)
    * [ 1. Async_ConfigOnDoubleReset](https://github.com/khoih-prog/ESPAsync_WiFiManager/tree/master/examples/Async_ConfigOnDoubleReset)
    * [ 2. Async_ConfigOnDRD_FS_MQTT_Ptr](https://github.com/khoih-prog/ESPAsync_WiFiManager/tree/master/examples/Async_ConfigOnDRD_FS_MQTT_Ptr)
    * [ 3. Async_ESP32_FSWebServer_DRD](https://github.com/khoih-prog/ESPAsync_WiFiManager/tree/master/examples/Async_ESP32_FSWebServer_DRD)
    * [ 4. Async_ESP_FSWebServer_DRD](https://github.com/khoih-prog/ESPAsync_WiFiManager/tree/master/examples/Async_ESP_FSWebServer_DRD)
    * [ 5. Async_ConfigOnDRD_ESP32_minimal](https://github.com/khoih-prog/ESPAsync_WiFiManager/tree/master/examples/Async_ConfigOnDRD_ESP32_minimal)
    * [ 6. Async_ConfigOnDRD_ESP8266_minimal](https://github.com/khoih-prog/ESPAsync_WiFiManager/tree/master/examples/Async_ConfigOnDRD_ESP8266_minimal)
    * [ 7. Async_ConfigOnDRD_FS_MQTT_Ptr_Complex](https://github.com/khoih-prog/ESPAsync_WiFiManager/tree/master/examples/Async_ConfigOnDRD_FS_MQTT_Ptr_Complex)
    * [ 8. Async_ConfigOnDRD_FS_MQTT_Ptr_Medium](https://github.com/khoih-prog/ESPAsync_WiFiManager/tree/master/examples/Async_ConfigOnDRD_FS_MQTT_Ptr_Medium)
  * [Many other libraries are depending on this library's DRD feature](#many-other-libraries-are-depending-on-this-librarys-drd-feature)
    * [ 1. Blynk_WM](https://github.com/khoih-prog/Blynk_WM)
    * [ 2. Blynk_Async_WM](https://github.com/khoih-prog/Blynk_Async_WM)
    * [ 3. BlynkEthernet_WM](https://github.com/khoih-prog/BlynkEthernet_WM)
    * [ 4. BlynkESP32_BT_WF](https://github.com/khoih-prog/BlynkESP32_BT_WF)
    * [ 5. BlynkGSM_Manager](https://github.com/khoih-prog/BlynkEthernet_WM)
    * [ 6. Blynk_Async_ESP32_BT_WF](https://github.com/khoih-prog/Blynk_Async_ESP32_BT_WF)
    * [ 7. Blynk_Async_GSM_Manager](https://github.com/khoih-prog/Blynk_Async_GSM_Manager)
    * [ 8. Ethernet_Manager](https://github.com/khoih-prog/Ethernet_Manager)
* [Example checkWaitingDRD](#Example-checkWaitingDRD) 
* [Debug Terminal Output Samples](#debug-terminal-output-samples)
  * [1. ESP32_FSWebServer_DRD on ESP32_DEV](#1-esp32_fswebserver_drd-on-esp32_dev)
  * [2. ConfigOnDoubleReset on ESP32_DEV](#2-configondoublereset-on-esp32_dev)
  * [3. ESPAsync_WiFi using LittleFS on ESP32S3_DEV](#3-ESPAsync_WiFi-using-LittleFS-on-ESP32S3_DEV)
* [Libraries using ESP_DoubleResetDetector or DoubleResetDetector_Generic library](#libraries-using-esp_doubleresetdetector-or-doubleresetdetector_generic-library)
* [Debug](#debug)
* [Troubleshooting](#troubleshooting)
* [Issues](#issues)
* [TO DO](#to-do)
* [DONE](#done)
* [Contributions and Thanks](#contributions-and-thanks)
* [Contributing](#contributing)
* [License](#license)
* [Copyright](#copyright)

---
---

### Why do we need this [ESP_DoubleResetDetector library](https://github.com/khoih-prog/ESP_DoubleResetDetector)

#### Features

[**ESP_DoubleResetDetector**](https://github.com/khoih-prog/ESP_DoubleResetDetector) is a library for the **ESP8266 and ESP32** boards to detects a `double reset`, within configurable timeout (default 10s) seconds, so that an alternative start-up mode can be used. Example use cases are to allow re-configuration of a device's WiFi / MQTT / Blynk credentials.

This library is based on, modified, bug-fixed and improved from [`Stephen Denne's DoubleResetDetector`](https://github.com/datacute/DoubleResetDetector) to add support to ESP8266 and ESP32 using `EEPROM`, `SPIFFS` or `LittleFS` besides original `RTC`.

Currently, [`DoubleResetDetector`](https://github.com/datacute/DoubleResetDetector) only supports ESP8266 using RTC memory.
 
This library can be used to detect a `double reset within a predetermined time` to force the program to enter a special operation such as Config Portal, Clear Default Data, etc., using :

1. `EEPROM`, `SPIFFS` or `LittleFS` for ESP8266 and ESP32 boards.
2. `RTC` memory for ESP8266 boards (unadvised).

#### Currently supported Boards

This [**ESP_DoubleResetDetector** library](https://github.com/khoih-prog/ESP_DoubleResetDetector) currently supports these following boards:

 1. **ESP32, ESP32_C3, ESP32_S2 and ESP32_S3 boards, using EEPROM, SPIFFS or LittleFS**.
 2. **ESP8266 boards RTC memory, EEPROM, SPIFFS or LittleFS**
 
---
---

## Prerequisites

1. [`Arduino IDE 1.8.19+` for Arduino](https://github.com/arduino/Arduino). [![GitHub release](https://img.shields.io/github/release/arduino/Arduino.svg)](https://github.com/arduino/Arduino/releases/latest)
2. [`ESP32 Core 2.0.5+`](https://github.com/espressif/arduino-esp32) for ESP32-based boards. [![Latest release](https://img.shields.io/github/release/espressif/arduino-esp32.svg)](https://github.com/espressif/arduino-esp32/releases/latest/)
3. [`ESP8266 Core 3.0.2+`](https://github.com/esp8266/Arduino) for ESP8266-based boards. [![Latest release](https://img.shields.io/github/release/esp8266/Arduino.svg)](https://github.com/esp8266/Arduino/releases/latest/). SPIFFS is deprecated from ESP8266 core 2.7.1+, to use LittleFS. 
4. [`LittleFS_esp32 v1.0.6+`](https://github.com/lorol/LITTLEFS) for ESP32-based boards using LittleFS with ESP32 core **v1.0.5-**. To install, check [![arduino-library-badge](https://www.ardu-badge.com/badge/LittleFS_esp32.svg?)](https://www.ardu-badge.com/LittleFS_esp32). **Notice**: This [`LittleFS_esp32 library`](https://github.com/lorol/LITTLEFS) has been integrated to Arduino [ESP32 core v1.0.6+](https://github.com/espressif/arduino-esp32/tree/master/libraries/LITTLEFS) 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_DoubleResetDetector`, then select / install the latest version. You can also use this link [![arduino-library-badge](https://www.ardu-badge.com/badge/ESP_DoubleResetDetector.svg?)](https://www.ardu-badge.com/ESP_DoubleResetDetector) for more detailed instructions.

### Manual Install

1. Navigate to [ESP_DoubleResetDetector](https://github.com/khoih-prog/ESP_DoubleResetDetector) page.
2. Download the latest release `ESP_DoubleResetDetector-master.zip`.
3. Extract the zip file to `ESP_DoubleResetDetector-master` directory 
4. Copy the whole `ESP_DoubleResetDetector-master` folder to Arduino libraries' directory such as `~/Arduino/libraries/`.

### VS Code & PlatformIO:

1. Install [VS Code](https://code.visualstudio.com/)
2. Install [PlatformIO](https://platformio.org/platformio-ide)
3. Install [**ESP_DoubleResetDetector** library](https://registry.platformio.org/libraries/khoih-prog/ESP_DoubleResetDetector) by using [Library Manager](https://registry.platformio.org/libraries/khoih-prog/ESP_DoubleResetDetector/installation). Search for **ESP_DoubleResetDetector** in [Platform.io Author's Libraries](https://platformio.org/lib/search?query=author:%22Khoi%20Hoang%22)
4. Use included [platformio.ini](platformio/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](https://docs.platformio.org/page/projectconf.html)

---
---

#### HOWTO Usage

How to use

```cpp
// These defines must be put before #include <ESP_DoubleResetDetector.h>
// to select where to store DoubleResetDetector's variable.
// For ESP32, You must select one to be true (EEPROM or SPIFFS)
// For ESP8266, You must select one to be true (RTC, EEPROM, LITTLEFS or SPIFFS)
// Otherwise, library will use default EEPROM storage


#ifdef ESP8266
#define ESP8266_DRD_USE_RTC     false   //true
#define ESP_DRD_USE_LITTLEFS    true    //false
#endif

#define ESP_DRD_USE_EEPROM      false
#define ESP_DRD_USE_SPIFFS      true

#define DOUBLERESETDETECTOR_DEBUG       true  //false

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

// Number of seconds after reset during which a 
// subsequent reset will be considered a double reset.
#define DRD_TIMEOUT 10

// RTC Memory Address for the DoubleResetDetector to use
#define DRD_ADDRESS 0

DoubleResetDetector* drd;

#ifdef ESP32

// For ESP32
#ifndef LED_BUILTIN
#define LED_BUILTIN       2         // Pin D2 mapped to pin GPIO2/ADC12 of ESP32, control on-board LED
#endif

#define LED_OFF     LOW
#define LED_ON      HIGH

#else

// For ESP8266
#define LED_ON      LOW
#define LED_OFF     HIGH

#endif

void setup()
{
  pinMode(LED_BUILTIN, OUTPUT);
  
  Serial.begin(115200);
  Serial.println("\nStarting minimal example for ESP_DoubleResetDetector");
  
  drd = new DoubleResetDetector(DRD_TIMEOUT, DRD_ADDRESS);

  if (drd->detectDoubleReset()) 
  {
    Serial.println("Double Reset Detected");
    digitalWrite(LED_BUILTIN, LED_ON);
  } 
  else 
  {
    Serial.println("No Double Reset Detected");
    digitalWrite(LED_BUILTIN, LED_OFF);
  }
}

void loop()
{
  // Call the double reset detector loop method every so often,
  // so that it can recognise when the timeout expires.
  // You can also call drd.stop() when you wish to no longer
  // consider the next reset as a double reset.
  drd->loop();
}
```

---
---

### Examples

1. [ConfigOnDoubleReset](examples/ConfigOnDoubleReset)
2. [ConfigOnDRD_ESP32_minimal](examples/ConfigOnDRD_ESP32_minimal)
3. [ConfigOnDRD_ESP8266_minimal](examples/ConfigOnDRD_ESP8266_minimal)
4. [minimal](examples/minimal)

### Examples from other libraries

#### 1.[ESP_WiFiManager Library](https://github.com/khoih-prog/ESP_WiFiManager)

* [ 1. ConfigOnDoubleReset](https://github.com/khoih-prog/ESP_WiFiManager/tree/master/examples/ConfigOnDoubleReset)
* [ 2. ConfigOnDRD_FS_MQTT_Ptr](https://github.com/khoih-prog/ESP_WiFiManager/tree/master/examples/ConfigOnDRD_FS_MQTT_Ptr)
* [ 3. ESP32_FSWebServer_DRD](https://github.com/khoih-prog/ESP_WiFiManager/tree/master/examples/ESP32_FSWebServer_DRD)
* [ 4. ESP_FSWebServer_DRD](https://github.com/khoih-prog/ESP_WiFiManager/tree/master/examples/ESP_FSWebServer_DRD)
* [ 5. ConfigOnDRD_ESP32_minimal](https://github.com/khoih-prog/ESP_WiFiManager/tree/master/examples/ConfigOnDRD_ESP32_minimal)
* [ 6. ConfigOnDRD_ESP8266_minimal](https://github.com/khoih-prog/ESP_WiFiManager/tree/master/examples/ConfigOnDRD_ESP8266_minimal)
* [ 7. ConfigOnDRD_FS_MQTT_Ptr_Complex](https://github.com/khoih-prog/ESP_WiFiManager/tree/master/examples/ConfigOnDRD_FS_MQTT_Ptr_Complex)
* [ 8. ConfigOnDRD_FS_MQTT_Ptr_Medium](https://github.com/khoih-prog/ESP_WiFiManager/tree/master/examples/ConfigOnDRD_FS_MQTT_Ptr_Medium)
  
    
#### 2. [ESPAsync_WiFiManager Library](https://github.com/khoih-prog/ESPAsync_WiFiManager)

* [ 1. Async_ConfigOnDoubleReset](https://github.com/khoih-prog/ESPAsync_WiFiManager/tree/master/examples/Async_ConfigOnDoubleReset)
* [ 2. Async_ConfigOnDRD_FS_MQTT_Ptr](https://github.com/khoih-prog/ESPAsync_WiFiManager/tree/master/examples/Async_ConfigOnDRD_FS_MQTT_Ptr)
* [ 3. Async_ESP32_FSWebServer_DRD](https://github.com/khoih-prog/ESPAsync_WiFiManager/tree/master/examples/Async_ESP32_FSWebServer_DRD)
* [ 4. Async_ESP_FSWebServer_DRD](https://github.com/khoih-prog/ESPAsync_WiFiManager/tree/master/examples/Async_ESP_FSWebServer_DRD)
* [ 5. Async_ConfigOnDRD_ESP32_minimal](https://github.com/khoih-prog/ESPAsync_WiFiManager/tree/master/examples/Async_ConfigOnDRD_ESP32_minimal)
* [ 6. Async_ConfigOnDRD_ESP8266_minimal](https://github.com/khoih-prog/ESPAsync_WiFiManager/tree/master/examples/Async_ConfigOnDRD_ESP8266_minimal)
* [ 7. Async_ConfigOnDRD_FS_MQTT_Ptr_Complex](https://github.com/khoih-prog/ESPAsync_WiFiManager/tree/master/examples/Async_ConfigOnDRD_FS_MQTT_Ptr_Complex)
* [ 8. Async_ConfigOnDRD_FS_MQTT_Ptr_Medium](https://github.com/khoih-prog/ESPAsync_WiFiManager/tree/master/examples/Async_ConfigOnDRD_FS_MQTT_Ptr_Medium)

and there are many more.

#### Many other libraries are depending on this library's DRD feature

  All examples of these following libraries are using DRD feature of this [ESP_DoubleResetDetector Library](https://github.com/khoih-prog/ESP_DoubleResetDetector)


* [ 1. Blynk_WM](https://github.com/khoih-prog/Blynk_WM)
* [ 2. Blynk_Async_WM](https://github.com/khoih-prog/Blynk_Async_WM)
* [ 3. BlynkEthernet_WM](https://github.com/khoih-prog/BlynkEthernet_WM)
* [ 4. BlynkESP32_BT_WF](https://github.com/khoih-prog/BlynkESP32_BT_WF)
* [ 5. BlynkGSM_Manager](https://github.com/khoih-prog/BlynkEthernet_WM)
* [ 6. Blynk_Async_ESP32_BT_WF](https://github.com/khoih-prog/Blynk_Async_ESP32_BT_WF)
* [ 7. Blynk_Async_GSM_Manager](https://github.com/khoih-prog/Blynk_Async_GSM_Manager)
* [ 8. Ethernet_Manager](https://github.com/khoih-prog/Ethernet_Manager)

---
---

### Example [checkWaitingDRD](examples/checkWaitingDRD)

https://github.com/khoih-prog/ESP_DoubleResetDetector/blob/d990bbb07ea7b5ad3e822ebd0ac29a2d0ebec88b/examples/checkWaitingDRD/checkWaitingDRD.ino#L14-L134



---
---

### Debug Terminal Output Samples

#### 1. ESP32_FSWebServer_DRD on ESP32_DEV

This is terminal debug output when running [ESP32_FSWebServer_DRD](https://github.com/khoih-prog/ESP_WiFiManager/tree/master/examples/ESP32_FSWebServer_DRD) on  **ESP32 ESP32_DEV.**. Config Portal was requested by DRD to input and save Credentials. The boards then connected to WiFi AP **HueNet1** using new Static IP successfully. WiFi AP **HueNet1** is then lost, and board **autoreconnects** itself to backup WiFi AP **HueNet2**.

```cpp
Starting ESP32_FSWebServer_DRD with DoubleResetDetect using SPIFFS on ESP32_DEV
ESP_WiFiManager v1.12.1
ESP_DoubleResetDetector v1.3.2
FS File: /ConfigSW.json, size: 150B
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: /edit.htm.gz, size: 4.02KB
FS File: /favicon.ico, size: 1.12KB
FS File: /graphs.js.gz, size: 1.92KB
FS File: /index.htm, size: 3.63KB
FS File: /drd.dat, size: 4B
FS File: /wifi_cred.dat, size: 192B

[WM] RFC925 Hostname = ESP32-FSWebServerDRD
[WM] setAPStaticIPConfig
[WM] setSTAStaticIPConfig for USE_CONFIGURABLE_DNS
[WM] Set CORS Header to :  Your Access-Control-Allow-Origin
Stored: SSID = HueNet2, Pass = 12345678
[WM] * Add SSID =  HueNet2 , PW =  12345678
Got stored Credentials. Timeout 120s for Config Portal
SPIFFS Flag read = 0xd0d04321
No doubleResetDetected
Saving config file...
Saving config file OK
[WM] LoadWiFiCfgFile 
[WM] OK
[WM] * Add SSID =  HueNet1 , PW =  12345678
[WM] * Add SSID =  HueNet2 , PW =  12345678
ConnectMultiWiFi in setup
[WM] ConnectMultiWiFi with :
[WM] * Flash-stored Router_SSID =  HueNet2 , Router_Pass =  12345678
[WM] * Additional SSID =  HueNet1 , PW =  12345678
[WM] * Additional SSID =  HueNet2 , PW =  12345678
[WM] Connecting MultiWifi...
[WM] WiFi connected after time:  1
[WM] SSID: HueNet1 ,RSSI= -27
[WM] Channel: 2 ,IP address: 192.168.2.232
After waiting 3.16 secs more in setup(), connection result is connected. Local IP: 192.168.2.232
HTTP server started @ 192.168.2.232
Open http://esp32-fs-browser.local/edit to see the file browser
[WM] freeing allocated params!
Stop doubleResetDetecting
Saving config file...
Saving config file OK

WiFi lost. Call connectMultiWiFi in loop
[WM] ConnectMultiWiFi with :
[WM] * Flash-stored Router_SSID =  HueNet2 , Router_Pass =  12345678
[WM] * Additional SSID =  HueNet1 , PW =  12345678
[WM] * Additional SSID =  HueNet2 , PW =  12345678
[WM] Connecting MultiWifi...
[WM] WiFi connected after time:  3
[WM] SSID: HueNet2 ,RSSI= -59
[WM] Channel: 4 ,IP address: 192.168.2.232
HHHHHHHHHH HHHHHHHHHH HHHHHHHHHH HHHHHHHHHH
```

---

#### 2. ConfigOnDoubleReset on ESP32_DEV

This is terminal debug output when running [ConfigOnDoubleReset](https://github.com/khoih-prog/ESP_WiFiManager/tree/master/examples/ConfigOnDoubleReset) on  **ESP32 ESP32_DEV.**. Config Portal was requested by DRD to input and save Credentials.


```cpp
Starting ConfigOnDoubleReset with DoubleResetDetect using LittleFS on ESP32_DEV
ESP_WiFiManager v1.12.1
ESP_DoubleResetDetector v1.3.2
[WM] RFC925 Hostname = ConfigOnDoubleReset
[WM] Set CORS Header to :  Your Access-Control-Allow-Origin
Stored: SSID = HueNet1, Pass = 12345678
[WM] * Add SSID =  HueNet1 , PW =  87654321
Got stored Credentials. Timeout 120s for Config Portal
LittleFS Flag read = 0xd0d04321
No doubleResetDetected
Saving config file...
Saving config file OK
[WM] LoadWiFiCfgFile 
[WM] OK
[WM] * Add SSID =  HueNet1 , PW =  jenniqqs
[WM] * Add SSID =  HueNet2 , PW =  jenniqqs
ConnectMultiWiFi in setup
[WM] ConnectMultiWiFi with :
[WM] * Flash-stored Router_SSID =  HueNet1 , Router_Pass =  jenniqqs
[WM] * Additional SSID =  HueNet1 , PW =  12345678
[WM] * Additional SSID =  HueNet2 , PW =  87654321
[WM] Connecting MultiWifi...
[WM] WiFi connected after time:  1
[WM] SSID: HueNet1 ,RSSI= -32
[WM] Channel: 2 ,IP address: 192.168.2.101
After waiting 4.43 secs more in setup(), connection result is connected. Local IP: 192.168.2.101
[WM] freeing allocated params!
HStop doubleResetDetecting
Saving config file...
Saving config file OK
HHHHHHHHH HHHHHHHHHH HHHHHHHHHH HHHHHHHHHH HHHHHHHHHH HHHHHHHHHH HHHHHHHHHH HHHHHHHHHH

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:1216
ho 0 tail 12 room 4
load:0x40078000,len:9720
ho 0 tail 12 room 4
load:0x40080400,len:6352
entry 0x400806b8

Starting ConfigOnDoubleReset with DoubleResetDetect using LittleFS on ESP32_DEV
ESP_WiFiManager v1.12.1
ESP_DoubleResetDetector v1.3.2
[WM] RFC925 Hostname = ConfigOnDoubleReset
[WM] Set CORS Header to :  Your Access-Control-Allow-Origin
Stored: SSID = HueNet1, Pass = jenniqqs
[WM] * Add SSID =  HueNet1 , PW =  jenniqqs
Got stored Credentials. Timeout 120s for Config Portal
LittleFS Flag read = 0xd0d01234
doubleResetDetected
Saving config file...
Saving config file OK
Open Config Portal without Timeout: Double Reset Detected
Starting configuration portal.
[WM] WiFi.waitForConnectResult Done
[WM] SET AP
[WM] Configuring AP SSID = ESP_9ABF498
[WM] AP PWD = your_password
[WM] AP Channel = 3
[WM] AP IP address = 192.168.4.1
[WM] HTTP server started
[WM] ESP_WiFiManager::startConfigPortal : Enter loop

```

---

#### 3. ESPAsync_WiFi using LittleFS on ESP32S3_DEV

This is terminal debug output when running [ESPAsync_WiFi](https://github.com/khoih-prog/ESPAsync_WiFiManager_Lite/tree/master/examples/ESPAsync_WiFi) on  **ESP32 ESP32S3_DEV.**. Config Portal was requested by DRD to input and save Credentials.


```cpp
Starting ESPAsync_WiFi using LittleFS on ESP32S3_DEV
ESPAsync_WiFiManager_Lite v1.9.0
ESP_DoubleResetDetector v1.3.2
LittleFS Flag read = 0xD0D01234
doubleResetDetected
Saving config file...
Saving config file OK
[WML] Hdr=ESP_WM_LITE,SSID=HueNet1,PW=12345678
[WML] SSID1=HueNet2,PW1=12345678
[WML] BName=ESP32_S3
[WML] Hdr=ESP_WM_LITE,SSID=HueNet1,PW=12345678
[WML] SSID1=HueNet2,PW1=12345678
[WML] BName=ESP32_S3
[WML] WiFi networks found:
[WML] 1: HueNet, -20dB
[WML] 2: HueNetTek, -32dB
[WML] 3: HueNet1, -39dB
[WML] 4: HueNet2, -54dB
[WML] 5: DECO-5655, -72dB
[WML] 6: Guest5655, -72dB
[WML] 7: rogers786, -76dB
[WML] 8: AT_301_WLREL6325F_f66d, -76dB
[WML] 10: Rogers 786, -78dB
[WML] 11: BELL042, -80dB
[WML] 12: WirelessMississauga, -82dB
[WML] 13: SmartRG-02a2, -87dB
[WML] 14: Jasmine, -87dB
[WML] 15: Access, -89dB
[WML] 16: Jessie, -90dB
[WML] 
stConf:SSID=ESP_E1A1DF7C,PW=MyESP_E1A1DF7C
[WML] IP=192.168.4.1,ch=10
F
Your stored Credentials :
Blynk Server1 = account.duckdns.org
Token1 = token1
Blynk Server2 = account.ddns.net
Token2 = token2
Port = 8080
MQTT Server = mqtt.duckdns.org
```

---

### Libraries using ESP_DoubleResetDetector or DoubleResetDetector_Generic library

You can also see how [`ESP_DoubleResetDetector`](https://github.com/khoih-prog/ESP_DoubleResetDetector) and [`DoubleResetDetector_Generic`](https://github.com/khoih-prog/DoubleResetDetector_Generic) are applied in many other libraries, such as:

 1. [Blynk_WM](https://github.com/khoih-prog/Blynk_WM)
 2. [BlynkEthernet_WM](https://github.com/khoih-prog/BlynkEthernet_WM)
 3. [WiFiManager_NINA_Lite](https://github.com/khoih-prog/WiFiManager_NINA_Lite)
 4. [BlynkESP32_BT_WF](https://github.com/khoih-prog/BlynkESP32_BT_WF), 
 5. [Blynk_GSM_Manager](https://github.com/khoih-prog/Blynk_GSM_Manager),
 6. [Blynk_Esp8266AT_WM](https://github.com/khoih-prog/Blynk_Esp8266AT_WM), 
 7. [Blynk_WiFiNINA_WM](https://github.com/khoih-prog/Blynk_WiFiNINA_WM), 
 8. [Blynk_Async_WM](https://github.com/khoih-prog/Blynk_Async_WM),
 9. [Blynk_Async_ESP32_BT_WF](https://github.com/khoih-prog/Blynk_Async_ESP32_BT_WF), 
10. [Blynk_Async_GSM_Manager](https://github.com/khoih-prog/Blynk_Async_GSM_Manager),
11. [ESP_WiFiManager](https://github.com/khoih-prog/ESP_WiFiManager)
12. [ESPAsync_WiFiManager](https://github.com/khoih-prog/ESPAsync_WiFiManager)
13. [WiFiManager_NINA_Lite](https://github.com/khoih-prog/WiFiManager_NINA_Lite)
14. [BlynkEthernet_STM32_WM](https://github.com/khoih-prog/BlynkEthernet_STM32_WM),
15. [ESP_AT_WM_Lite](https://github.com/khoih-prog/ESP_AT_WM_Lite)
16. [WIOTerminal_WiFiManager](https://github.com/khoih-prog/WIOTerminal_WiFiManager)
17. [Ethernet_Manager](https://github.com/khoih-prog/Ethernet_Manager)
18. [Ethernet_Manager_STM32](https://github.com/khoih-prog/Ethernet_Manager_STM32)

and the list is growing fast.

---
---

### Debug

Debug is disabled by default. To enable debug:

```cpp
// Use this to output debug msgs to Serial
#define DOUBLERESETDETECTOR_DEBUG       true
```

---

### Troubleshooting

If you get compilation errors, more often than not, you may need to install a newer version of the `ESP32 / ESP8266` core for Arduino.

Sometimes, the library will only work if you update the `ESP32 / ESP8266` core to the latest version because I am using some newly added function.

---
---

### Issues ###

Submit issues to: [ESP_DoubleResetDetector issues](https://github.com/khoih-prog/ESP_DoubleResetDetector/issues)

---
---

### TO DO

1. Search for bug and improvement.


### DONE

1. For ESP32 and ESP8266 (EEPROM, SPIFFS and LittleFS).
2. Similar features for Arduino (UNO, Mega, SAM DUE, SAMD21/SAMD51, nRF52, STM32, Teensy, etc.). Look at [**DoubleResetDetector_Generic**](https://github.com/khoih-prog/DoubleResetDetector_Generic)
3. Add support to `ESP32_C3`, `ESP32_S2`
4. Add support to `ESP32_S3` using ESP32 core v2.0.2+
5. Add waitingForDRD() function to signal in DRD waiting period
6. Fix ESP32 chipID for example`ConfigOnDoubleReset`
7. Remove dependency on `LittleFS_esp32` library to prevent PIO error when using new ESP32 core v1.0.6+
8. Add astyle using `allman` style. Restyle the library

---
---

### Contributions and thanks

1. Thanks to [zobix](https://github.com/zobix) for report the bug in [Issue 2](https://github.com/khoih-prog/ESP_DoubleResetDetector/issues/2)
1. Thanks to [Tochi Moreno](https://github.com/tochimoreno) for enhancement request in [DRD is waiting for a double reset? #14](https://github.com/khoih-prog/ESP_DoubleResetDetector/discussions/14) leading to v1.3.1 to add `waitingForDRD()` function to signal in DRD waiting period


<table>
  <tr>
    <td align="center"><a href="https://github.com/zobix"><img src="https://github.com/zobix.png" width="100px;" alt="zobix"/><br /><sub><b>Zobix</b></sub></a><br /></td>
    <td align="center"><a href="https://github.com/tochimoreno"><img src="https://github.com/tochimoreno.png" width="100px;" alt="tochimoreno"/><br /><sub><b>Tochi Moreno</b></sub></a><br /></td>
  </tr> 
</table>

---

### 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](https://github.com/khoih-prog/ESP_DoubleResetDetector/blob/master/LICENSE)

---

### Copyright

Copyright (c) 2019- Khoi Hoang


