[GH-ISSUE #1082] Exception thrown when trying to start edit settings in onDemand portal #924

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opened 2026-02-28 01:27:41 +03:00 by kerem · 2 comments

kerem commented

2026-02-28 01:27:41 +03:00

Owner

Originally created by @almcelmon on GitHub (Jun 20, 2020).
Original GitHub issue: https://github.com/tzapu/WiFiManager/issues/1082

Basic Infos

Hardware

WiFimanager Branch/Release:

Master
Development

Esp8266/Esp32:

ESP8266
ESP32

Hardware: ESP-12e, esp01, esp25

ESP01
ESP12 E/F/S (nodemcu, wemos, feather)
Other

ESP Core Version: 2.4.0, staging

2.3.0
2.4.0
staging (master/dev)

Description

My goal is to launch WifiManager on setup. At a later date, I'd like users to press a button that re-initiates the process, they'll connect to the defined wifi AP and once they hit save, the device will reset. I don't need this process to be non blocking (I think). Eventually, I will save the settings and restart the device once they are done. Basically, when I hit the button, I'd like wifimanager to act the same way it does if you boot the device with no stored wifi credentials.

This seems to work, but when I open Wifi settings, I get the error shown below.

I apologize, unfortunately, due to the complexity of my sketch, the code below is not 100% matched with what I have on my end. I think the problem may be the way I'm declaring WifiManger?

Settings in IDE

Module: NodeMcu, Wemos D1

Additional libraries:

Sketch

#include <Arduino.h>

#include <WiFiManager.h>       //WiFi Manager to allow users to configure device via mobile   //https://github.com/tzapu/WiFiManager

bool buttonPressed = false;

const int buttonPin = D3;     // the number of the pushbutton pin
int buttonState = 0;         // variable for reading the pushbutton status

WiFiManager wifiManager;

unsigned long now = millis();
unsigned long lastTrigger = 0;

ICACHE_RAM_ATTR void buttonCallback(){
  buttonPressed = true;
}

void saveConfigCallback () {
  Serial.println("Should save config");
  
}
void setup() {
    Serial.begin(115200);
    pinMode(buttonPin, INPUT);


  // Serial.setDebugOutput(true);
	attachInterrupt(digitalPinToInterrupt(buttonPin), buttonCallback, CHANGE);


  WiFiManagerParameter key("apiKey", "Key", "token", 40);
  wifiManager.addParameter(&key);

  WiFiManagerParameter service_ids("service_ids", "ID", "ID", 100);
  wifiManager.addParameter(&service_ids);

  wifiManager.setSaveConfigCallback(saveConfigCallback);

  wifiManager.autoConnect("IOT");
  wifiManager.setMinimumSignalQuality(10); // Low signal quality could cause false negatives
  

  Serial.println("Setup complete");

}

void loop() {
  now = millis();
  wifiManager.process();
 // buttonState = digitalRead(buttonPin);
  if (buttonPressed == true) {
    Serial.println("Button pressed");
    

    //wifiManager.setConfigPortalBlocking(false);
    wifiManager.startConfigPortal("IOT");
    //wifiManager.startWebPortal();

    buttonPressed = false;

    delay(50);
  }
}

Debug Messages

Exception (3):
epc1=0x4000bf64 epc2=0x00000000 epc3=0x00000000 excvaddr=0x4020f483 depc=0x00000000

>>>stack>>>

ctx: cont
sp: 3ffffba0 end: 3fffffc0 offset: 0190
3ffffd30:  402799ca 3ffffd50 4020f483 40211813
3ffffd40:  00000000 4020f483 3ffffda4 40207641
3ffffd50:  3fff3a00 002c002f 80fffda4 007d747b  
3ffffd60:  00000000 8327b219 3ffffda4 40211b7c
3ffffd70:  00000001 00000000 3ffefb6c 40208a41  
3ffffd80:  007d6300 00000e73 80fffe34 402117a7
3ffffd90:  00000e73 3ffffde0 3ffffe28 4021249b  
3ffffda0:  ffffffff 3fff3994 0092009f 0020755c
3ffffdb0:  3fff35b4 005c005f 00fefb6c 40208797  
3ffffdc0:  00000e7c 402799de 3ffffe28 00000e7c
3ffffdd0:  ffffffff 0000000c 00000037 ffffffff
3ffffde0:  00000011 00000047 00000053 00000058  
3ffffdf0:  3ffffe10 8027b2c1 3ffefb6c 40209a64
3ffffe00:  00000001 402799ce 3ffefb6c 4020dcfa  
3ffffe10:  3fff3700 0014001f 80005053 00000005
3ffffe20:  3fff2ad8 3ffffe70 3fff388c 00fd00ff  
3ffffe30:  00fffe90 3fff406c 0e7c0e7f 00209a64
3ffffe40:  00000001 00000001 3fff2a7c 40216410  
3ffffe50:  3ffffe90 3fff288c 3fff2a7c 401000e1
3ffffe60:  3fff2a7c 3fff288c 3fff2a7c 40209a9c
3ffffe70:  66697700 80000069 80000000 fffffffe  
3ffffe80:  3fff2a7c 3fff288c 3fff284c 4020eeca  
3ffffe90:  6669772f 00000069 85fefec8 3fff3c00
3ffffea0:  000000af 80003f69 40100400 00017dcf
3ffffeb0:  3fff288c 00000000 00000001 00000001  
3ffffec0:  00000001 3fff2a7c 79999999 00000000
3ffffed0:  00000000 00000000 4bc6a7f0 3ffefec8  
3ffffee0:  00000001 3fff2870 3fff284c 4020efd7
3ffffef0:  00000000 3fff22f4 00000000 402156c0  
3fffff00:  01b9790c 3ffefc6c 3ffefb6c 40215b5c
3fffff10:  00000000 3ffefc6c 3ffefb6c 4020f1d5  
3fffff20:  00000000 3ffefc6c 3ffefb6c 402097be
3fffff30:  00000000 00000000 00000001 401003f8
3fffff40:  000e000f 80737574 3ffefb6c 3ffefec8  
3fffff50:  00000000 3ffefc6c 3ffefb6c 3ffefec8
3fffff60:  00000000 3ffefc6c 3ffefb6c 4020f483  
3fffff70:  3ffefb68 0000000e 3ffefd88 4021107c
3fffff80:  3ffe88f9 00000000 3ffefd88 402110a0  
3fffff90:  3ffefb68 3ffefb6c 3ffefd18 40202fe0  
3fffffa0:  3fffdad0 00000000 3ffefe88 40212ac0
3fffffb0:  feefeffe feefeffe 3ffe8610 4010109d
<<<stack<<<

 ets Jan  8 2013,rst cause:2, boot mode:(3,6)

load 0x4010f000, len 3456, room 16
tail 0
chksum 0x84
csum 0x84
va5432625
~ld

Originally created by @almcelmon on GitHub (Jun 20, 2020). Original GitHub issue: https://github.com/tzapu/WiFiManager/issues/1082 ### Basic Infos #### Hardware **WiFimanager Branch/Release:** - [ ] Master - [X] Development **Esp8266/Esp32:** - [X] ESP8266 - [ ] ESP32 **Hardware: ESP-12e, esp01, esp25** - [ ] ESP01 - [X] ESP12 E/F/S (nodemcu, wemos, feather) - [ ] Other **ESP Core Version: 2.4.0, staging** - [ ] 2.3.0 - [X] 2.4.0 - [ ] staging (master/dev) ### Description My goal is to launch WifiManager on setup. At a later date, I'd like users to press a button that re-initiates the process, they'll connect to the defined wifi AP and once they hit save, the device will reset. I don't need this process to be non blocking (I think). Eventually, I will save the settings and restart the device once they are done. Basically, when I hit the button, I'd like wifimanager to act the same way it does if you boot the device with no stored wifi credentials. This seems to work, but when I open Wifi settings, I get the error shown below. I apologize, unfortunately, due to the complexity of my sketch, the code below is not 100% matched with what I have on my end. I think the problem may be the way I'm declaring WifiManger? ### Settings in IDE Module: NodeMcu, Wemos D1 Additional libraries: ### Sketch ``` #include <Arduino.h> #include <WiFiManager.h> //WiFi Manager to allow users to configure device via mobile //https://github.com/tzapu/WiFiManager bool buttonPressed = false; const int buttonPin = D3; // the number of the pushbutton pin int buttonState = 0; // variable for reading the pushbutton status WiFiManager wifiManager; unsigned long now = millis(); unsigned long lastTrigger = 0; ICACHE_RAM_ATTR void buttonCallback(){ buttonPressed = true; } void saveConfigCallback () { Serial.println("Should save config"); } void setup() { Serial.begin(115200); pinMode(buttonPin, INPUT); // Serial.setDebugOutput(true); attachInterrupt(digitalPinToInterrupt(buttonPin), buttonCallback, CHANGE); WiFiManagerParameter key("apiKey", "Key", "token", 40); wifiManager.addParameter(&key); WiFiManagerParameter service_ids("service_ids", "ID", "ID", 100); wifiManager.addParameter(&service_ids); wifiManager.setSaveConfigCallback(saveConfigCallback); wifiManager.autoConnect("IOT"); wifiManager.setMinimumSignalQuality(10); // Low signal quality could cause false negatives Serial.println("Setup complete"); } void loop() { now = millis(); wifiManager.process(); // buttonState = digitalRead(buttonPin); if (buttonPressed == true) { Serial.println("Button pressed"); //wifiManager.setConfigPortalBlocking(false); wifiManager.startConfigPortal("IOT"); //wifiManager.startWebPortal(); buttonPressed = false; delay(50); } } ``` ### Debug Messages ``` Exception (3): epc1=0x4000bf64 epc2=0x00000000 epc3=0x00000000 excvaddr=0x4020f483 depc=0x00000000 >>>stack>>> ctx: cont sp: 3ffffba0 end: 3fffffc0 offset: 0190 3ffffd30: 402799ca 3ffffd50 4020f483 40211813 3ffffd40: 00000000 4020f483 3ffffda4 40207641 3ffffd50: 3fff3a00 002c002f 80fffda4 007d747b 3ffffd60: 00000000 8327b219 3ffffda4 40211b7c 3ffffd70: 00000001 00000000 3ffefb6c 40208a41 3ffffd80: 007d6300 00000e73 80fffe34 402117a7 3ffffd90: 00000e73 3ffffde0 3ffffe28 4021249b 3ffffda0: ffffffff 3fff3994 0092009f 0020755c 3ffffdb0: 3fff35b4 005c005f 00fefb6c 40208797 3ffffdc0: 00000e7c 402799de 3ffffe28 00000e7c 3ffffdd0: ffffffff 0000000c 00000037 ffffffff 3ffffde0: 00000011 00000047 00000053 00000058 3ffffdf0: 3ffffe10 8027b2c1 3ffefb6c 40209a64 3ffffe00: 00000001 402799ce 3ffefb6c 4020dcfa 3ffffe10: 3fff3700 0014001f 80005053 00000005 3ffffe20: 3fff2ad8 3ffffe70 3fff388c 00fd00ff 3ffffe30: 00fffe90 3fff406c 0e7c0e7f 00209a64 3ffffe40: 00000001 00000001 3fff2a7c 40216410 3ffffe50: 3ffffe90 3fff288c 3fff2a7c 401000e1 3ffffe60: 3fff2a7c 3fff288c 3fff2a7c 40209a9c 3ffffe70: 66697700 80000069 80000000 fffffffe 3ffffe80: 3fff2a7c 3fff288c 3fff284c 4020eeca 3ffffe90: 6669772f 00000069 85fefec8 3fff3c00 3ffffea0: 000000af 80003f69 40100400 00017dcf 3ffffeb0: 3fff288c 00000000 00000001 00000001 3ffffec0: 00000001 3fff2a7c 79999999 00000000 3ffffed0: 00000000 00000000 4bc6a7f0 3ffefec8 3ffffee0: 00000001 3fff2870 3fff284c 4020efd7 3ffffef0: 00000000 3fff22f4 00000000 402156c0 3fffff00: 01b9790c 3ffefc6c 3ffefb6c 40215b5c 3fffff10: 00000000 3ffefc6c 3ffefb6c 4020f1d5 3fffff20: 00000000 3ffefc6c 3ffefb6c 402097be 3fffff30: 00000000 00000000 00000001 401003f8 3fffff40: 000e000f 80737574 3ffefb6c 3ffefec8 3fffff50: 00000000 3ffefc6c 3ffefb6c 3ffefec8 3fffff60: 00000000 3ffefc6c 3ffefb6c 4020f483 3fffff70: 3ffefb68 0000000e 3ffefd88 4021107c 3fffff80: 3ffe88f9 00000000 3ffefd88 402110a0 3fffff90: 3ffefb68 3ffefb6c 3ffefd18 40202fe0 3fffffa0: 3fffdad0 00000000 3ffefe88 40212ac0 3fffffb0: feefeffe feefeffe 3ffe8610 4010109d <<<stack<<< ets Jan 8 2013,rst cause:2, boot mode:(3,6) load 0x4010f000, len 3456, room 16 tail 0 chksum 0x84 csum 0x84 va5432625 ~ld ```

kerem commented

2026-02-28 01:27:42 +03:00

Author

Owner

@tablatronix commented on GitHub (Jun 21, 2020):

Make sure wifimanager is in the same scope either global or redeclare it in your loop if not

@tablatronix commented on GitHub (Jun 21, 2020): Make sure wifimanager is in the same scope either global or redeclare it in your loop if not

kerem commented

2026-02-28 01:27:42 +03:00

Author

Owner

@tablatronix commented on GitHub (Jun 21, 2020):

Also there is an example for this

@tablatronix commented on GitHub (Jun 21, 2020): Also there is an example for this