ESP_DoubleResetDetector Library

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Table of Contents

• Why do we need this ESP_DoubleResetDetector library
  • Features
  • Currently supported Boards
• Changelog
• Prerequisites
• Installation
  • Use Arduino Library Manager
  • Manual Install
  • VS Code & PlatformIO
• HOWTO Usage
• Examples
  • 1. ConfigOnDoubleReset
  • 2. ConfigOnDRD_ESP32_minimal
  • 3. ConfigOnDRD_ESP8266_minimal
  • 4. minimal
  • 5. checkWaitingDRD New
• Examples from other libraries
• 1. ESP_WiFiManager Library
  • 1. ConfigOnDoubleReset
  • 2. ConfigOnDRD_FS_MQTT_Ptr
  • 3. ESP32_FSWebServer_DRD
  • 4. ESP_FSWebServer_DRD
  • 5. ConfigOnDRD_ESP32_minimal
  • 6. ConfigOnDRD_ESP8266_minimal
  • 7. ConfigOnDRD_FS_MQTT_Ptr_Complex
  • 8. ConfigOnDRD_FS_MQTT_Ptr_Medium
• 2. ESPAsync_WiFiManager Library
  • 1. Async_ConfigOnDoubleReset
  • 2. Async_ConfigOnDRD_FS_MQTT_Ptr
  • 3. Async_ESP32_FSWebServer_DRD
  • 4. Async_ESP_FSWebServer_DRD
  • 5. Async_ConfigOnDRD_ESP32_minimal
  • 6. Async_ConfigOnDRD_ESP8266_minimal
  • 7. Async_ConfigOnDRD_FS_MQTT_Ptr_Complex
  • 8. Async_ConfigOnDRD_FS_MQTT_Ptr_Medium
• Many other libraries are depending on this library's DRD feature
  • 1. Blynk_WM
  • 2. Blynk_Async_WM
  • 3. BlynkEthernet_WM
  • 4. BlynkESP32_BT_WF
  • 5. BlynkGSM_Manager
  • 6. Blynk_Async_ESP32_BT_WF
  • 7. Blynk_Async_GSM_Manager
  • 8. Ethernet_Manager
• Example checkWaitingDRD
• Debug Terminal Output Samples
  • 1. ESP32_FSWebServer_DRD on ESP32_DEV
  • 2. ConfigOnDoubleReset on ESP32_DEV
  • 3. ESPAsync_WiFi using LittleFS on ESP32S3_DEV
• Libraries using ESP_DoubleResetDetector or DoubleResetDetector_Generic library
• Debug
• Troubleshooting
• Issues
• TO DO
• DONE
• Contributions and Thanks
• Contributing
• License
• Copyright

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Why do we need this ESP_DoubleResetDetector library

Features

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 to add support to ESP8266 and ESP32 using EEPROM, SPIFFS or LittleFS besides original RTC.

Currently, 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 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

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Prerequisites

1. Arduino IDE 1.8.19+ for Arduino.
2. ESP32 Core 2.0.5+ for ESP32-based boards.
3. ESP8266 Core 3.0.2+ for ESP8266-based boards. . SPIFFS is deprecated from ESP8266 core 2.7.1+, to use LittleFS.
4. 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+

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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 for more detailed instructions.

Manual Install

1. Navigate to 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
2. Install PlatformIO
3. Install ESP_DoubleResetDetector library by using Library Manager. Search for ESP_DoubleResetDetector in Platform.io Author's Libraries
4. 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

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HOWTO Usage

How to use

// 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();
}

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Examples

1. ConfigOnDoubleReset
2. ConfigOnDRD_ESP32_minimal
3. ConfigOnDRD_ESP8266_minimal
4. minimal

Examples from other libraries

1.ESP_WiFiManager Library

• 1. ConfigOnDoubleReset
• 2. ConfigOnDRD_FS_MQTT_Ptr
• 3. ESP32_FSWebServer_DRD
• 4. ESP_FSWebServer_DRD
• 5. ConfigOnDRD_ESP32_minimal
• 6. ConfigOnDRD_ESP8266_minimal
• 7. ConfigOnDRD_FS_MQTT_Ptr_Complex
• 8. ConfigOnDRD_FS_MQTT_Ptr_Medium

2. ESPAsync_WiFiManager Library

• 1. Async_ConfigOnDoubleReset
• 2. Async_ConfigOnDRD_FS_MQTT_Ptr
• 3. Async_ESP32_FSWebServer_DRD
• 4. Async_ESP_FSWebServer_DRD
• 5. Async_ConfigOnDRD_ESP32_minimal
• 6. Async_ConfigOnDRD_ESP8266_minimal
• 7. Async_ConfigOnDRD_FS_MQTT_Ptr_Complex
• 8. 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

• 1. Blynk_WM
• 2. Blynk_Async_WM
• 3. BlynkEthernet_WM
• 4. BlynkESP32_BT_WF
• 5. BlynkGSM_Manager
• 6. Blynk_Async_ESP32_BT_WF
• 7. Blynk_Async_GSM_Manager
• 8. Ethernet_Manager

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Example checkWaitingDRD

ESP_DoubleResetDetector/examples/checkWaitingDRD/checkWaitingDRD.ino

Lines 14 to 134 in d990bbb

	// 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
	// This example demonstrates how to use new function waitingForDRD() to signal the stage of DRD
	// waitingForDRD() returns true if in DRD_TIMEOUT, false when out of DRD_TIMEOUT
	// In this example, LED_BUILTIN will blink in DRD_TIMEOUT period, ON when DR has been detected, OFF otherwise
	#ifdef ESP8266
	#define ESP8266_DRD_USE_RTC false //true
	#endif
	#define ESP_DRD_USE_LITTLEFS true
	#define ESP_DRD_USE_SPIFFS false
	#define ESP_DRD_USE_EEPROM false
	// Uncomment to have debug
	//#define DOUBLERESETDETECTOR_DEBUG true
	#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
	bool DRD_Detected = false;
	void check_status()
	{
	static ulong checkstatus_timeout = 0;
	static bool LEDState = LED_OFF;
	static ulong current_millis;
	#define DRD_CHECK_INTERVAL 500L
	current_millis = millis();
	// If DRD_Detected, don't need to blink, just keep LED_BUILTIN ON
	if ( !DRD_Detected && ((current_millis > checkstatus_timeout) || (checkstatus_timeout == 0)) )
	{
	// If in DRD checking loop, blinking the LED_BUILTIN
	if ( drd->waitingForDRD() )
	{
	digitalWrite(LED_BUILTIN, LEDState);
	LEDState = !LEDState;
	}
	else
	{
	digitalWrite(LED_BUILTIN, LED_OFF);
	}
	checkstatus_timeout = current_millis + DRD_CHECK_INTERVAL;
	}
	}
	void setup()
	{
	pinMode(LED_BUILTIN, OUTPUT);
	Serial.begin(115200);
	while (!Serial);
	delay(200);
	Serial.print("\nStarting checkWaitingDRD on");
	Serial.println(ARDUINO_BOARD);
	Serial.println(ESP_DOUBLE_RESET_DETECTOR_VERSION);
	drd = new DoubleResetDetector(DRD_TIMEOUT, DRD_ADDRESS);
	if (drd->detectDoubleReset())
	{
	Serial.println("Double Reset Detected");
	digitalWrite(LED_BUILTIN, LED_ON);
	DRD_Detected = true;
	}
	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();
	check_status();
	}

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Debug Terminal Output Samples

1. ESP32_FSWebServer_DRD on ESP32_DEV

This is terminal debug output when running 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.

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

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2. ConfigOnDoubleReset on ESP32_DEV

This is terminal debug output when running ConfigOnDoubleReset on ESP32 ESP32_DEV.. Config Portal was requested by DRD to input and save Credentials.

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

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3. ESPAsync_WiFi using LittleFS on ESP32S3_DEV

This is terminal debug output when running ESPAsync_WiFi on ESP32 ESP32S3_DEV.. Config Portal was requested by DRD to input and save Credentials.

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

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Libraries using ESP_DoubleResetDetector or DoubleResetDetector_Generic library

You can also see how ESP_DoubleResetDetector and DoubleResetDetector_Generic are applied in many other libraries, such as:

1. Blynk_WM
2. BlynkEthernet_WM
3. WiFiManager_NINA_Lite
4. BlynkESP32_BT_WF,
5. Blynk_GSM_Manager,
6. Blynk_Esp8266AT_WM,
7. Blynk_WiFiNINA_WM,
8. Blynk_Async_WM,
9. Blynk_Async_ESP32_BT_WF,
10. Blynk_Async_GSM_Manager,
11. ESP_WiFiManager
12. ESPAsync_WiFiManager
13. WiFiManager_NINA_Lite
14. BlynkEthernet_STM32_WM,
15. ESP_AT_WM_Lite
16. WIOTerminal_WiFiManager
17. Ethernet_Manager
18. Ethernet_Manager_STM32

and the list is growing fast.

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Debug

Debug is disabled by default. To enable debug:

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

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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.

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Issues

Submit issues to: ESP_DoubleResetDetector issues

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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
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 exampleConfigOnDoubleReset
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

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Contributions and thanks

1. Thanks to zobix for report the bug in Issue 2
2. Thanks to Tochi Moreno for enhancement request in DRD is waiting for a double reset? #14 leading to v1.3.1 to add waitingForDRD() function to signal in DRD waiting period

Zobix

Tochi Moreno

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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

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License

• The library is licensed under MIT

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Copyright

Copyright (c) 2019- Khoi Hoang