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[GH-ISSUE #1028] Library Crashing on ESP-07 #875

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opened 2026-02-28 01:27:27 +03:00 by kerem · 5 comments
kerem commented 2026-02-28 01:27:27 +03:00
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Originally created by @geek1111 on GitHub (Mar 30, 2020).
Original GitHub issue: https://github.com/tzapu/WiFiManager/issues/1028

Basic Infos

Hardware

WiFimanager Branch/Release:

  • Master
  • Development 0.15-beta

Esp8266/Esp32:

  • ESP8266
  • ESP32

Hardware: ESP-12e, esp01, esp25

  • ESP01
  • ESP12 E/F/S (nodemcu, wemos, feather)
  • Other ( ESP-07 )

ESP Core Version: 2.4.0, staging

  • 2.3.0
  • 2.4.0
  • staging (master/dev)

Description

Hello I'm facing issue OnDemandConfigPortal sketch without any changes on ESP - 07
After a successful upload, I triggered the OnDemand event by pulling pin 0 low.
when I try to connect the ESP - 07 it crashes and my mobile/laptop wifi disconnects with OnDemanAP and tries to connect again and it crashes in a loop.

  • Tripple checked there are no power issues.
  • Re-Flashed AT Firmware and uploaded the same sketch.
  • Tried other examples available in the library. ( Similar Crash )

Settings in IDE

  • Board: Generic ESp8266 Module.
  • Upload Speed: 115200.
  • CPU Frequency: 80MHz.
  • Crystal Frequency: 26MHz.
  • Flash Size: 1MB (FS:64KB OTA:~470KB).
  • Flash Mode: Dout (compatible).
  • Flash Frequency: 40MHz.
  • Rest Method: dtr(aka nodemcu).
  • VTables: Flash.
  • Exceptions: Enabled.
  • Erase Flash: All Flash Contents.
  • Espressif FW: nonos-sdk 2.2.1 + 100 (190703)

Sketch


#include <ESP8266WiFi.h>          //https://github.com/esp8266/Arduino

//needed for library
#include <ESP8266WebServer.h>
#include <DNSServer.h>
#include <WiFiManager.h>          //https://github.com/tzapu/WiFiManager

// select which pin will trigger the configuration portal when set to LOW
// ESP-01 users please note: the only pins available (0 and 2), are shared 
// with the bootloader, so always set them HIGH at power-up
#define TRIGGER_PIN 0


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("\n Starting");

  pinMode(TRIGGER_PIN, INPUT);
}


void loop() {
  // is configuration portal requested?
  if ( digitalRead(TRIGGER_PIN) == LOW ) {
    //WiFiManager
    //Local intialization. Once its business is done, there is no need to keep it around
    WiFiManager wifiManager;

    //reset settings - for testing
    //wifiManager.resetSettings();

    //sets timeout until configuration portal gets turned off
    //useful to make it all retry or go to sleep
    //in seconds
    //wifiManager.setTimeout(120);

    //it starts an access point with the specified name
    //here  "AutoConnectAP"
    //and goes into a blocking loop awaiting configuration

    //WITHOUT THIS THE AP DOES NOT SEEM TO WORK PROPERLY WITH SDK 1.5 , update to at least 1.5.1
    //WiFi.mode(WIFI_STA);
    
    if (!wifiManager.startConfigPortal("OnDemandAP")) {
      Serial.println("failed to connect and hit timeout");
      delay(3000);
      //reset and try again, or maybe put it to deep sleep
      ESP.reset();
      delay(5000);
    }

    //if you get here you have connected to the WiFi
    Serial.println("connected...yeey :)");
  }


  // put your main code here, to run repeatedly:

}

Debug Messages

Starting
*WM: 
*WM: Configuring access point... 
*WM: OnDemandAP
*WM: AP IP address: 
*WM: 192.168.4.1
*WM: HTTP server started

Exception (9):
epc1=0x40000e62 epc2=0x00000000 epc3=0x00000000 excvaddr=0x01000001 depc=0x00000000

>>>stack>>>

ctx: cont
sp: 3ffefb10 end: 3ffefdf0 offset: 01a0
3ffefcb0:  00000000 00000000 00000001 40100190  
3ffefcc0:  4020d5e0 00000000 3ffefd40 401001b1  
3ffefcd0:  00000000 00000000 3ffefd40 40208966  
3ffefce0:  00000000 3ffeed88 3ffefd40 4020530e  
3ffefcf0:  3ffefd50 3ffe87b9 00000020 401009cc  
3ffefd00:  3ffefd50 3ffefd5c 3ffe87b9 402078fa  
3ffefd10:  00000000 3ffe87b9 3ffefd40 40204de0  
3ffefd20:  00000000 3fffdad0 3ffee8ec 3ffee8ec  
3ffefd30:  3fffdad0 00000000 00000000 402010a0  
3ffefd40:  3fff1254 3fff128c 3ffe8673 00000000  
3ffefd50:  3ffe8600 00000000 80000a0d 40209800  
3ffefd60:  3ffe86e6 80000000 00000000 00000000  
3ffefd70:  00002f0e 4020d3a0 00000000 4020d3a0  
3ffefd80:  00000000 4020d3a0 00000000 4020d3a0  
3ffefd90:  00000000 4020d3a0 00000000 4020d3a0  
3ffefda0:  00000000 00000000 ffffffff 40000001  
3ffefdb0:  3ffe87b9 00000000 00010035 00000000  
3ffefdc0:  00000000 0000000a 3fff1224 401001b1  
3ffefdd0:  feefeffe feefeffe 3ffee8ac 40208a58  
3ffefde0:  feefeffe feefeffe 3ffe84e0 40100c59  
<<<stack<<<

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

load 0x4010f000, len 1384, room 16 
tail 8
chksum 0x2d
csum 0x2d
vbc204a9b
~ld
⸮cl {⸮ndph
 Starting

Decoded Exceptions

Exception 9: LoadStoreAlignmentCause: Load or store to an unaligned address
PC: 0x40000e62
EXCVADDR: 0x01000001

Decoding stack results
0x40100190: ets_post(uint8, ETSSignal, ETSParam) at C:\Users\SURAJ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\core_esp8266_main.cpp line 160
0x401001b1: esp_schedule() at C:\Users\SURAJ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\core_esp8266_main.cpp line 113
0x40208966: __yield() at C:\Users\SURAJ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\core_esp8266_main.cpp line 99
0x4020530e: WiFiManager::startConfigPortal(char const*, char const*) at C:\Users\SURAJ\Documents\Arduino\libraries\WiFiManager\WiFiManager.cpp line 271
0x401009cc: malloc(size_t) at C:\Users\SURAJ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\umm_malloc\umm_malloc.cpp line 511
0x402078fa: String::String(char const*) at C:\Users\SURAJ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\WString.cpp line 36
0x40204de0: WiFiManager::WiFiManager() at C:\Users\SURAJ\Documents\Arduino\libraries\WiFiManager\WiFiManager.cpp line 72
0x402010a0: loop() at C:\Users\SURAJ\Documents\Arduino\libraries\WiFiManager\examples\OnDemandConfigPortal/OnDemandConfigPortal.ino line 45
0x40209800: uart_write(uart_t*, char const*, size_t) at C:\Users\SURAJ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\uart.cpp line 509
0x401001b1: esp_schedule() at C:\Users\SURAJ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\core_esp8266_main.cpp line 113
0x40208a58: loop_wrapper() at C:\Users\SURAJ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\core_esp8266_main.cpp line 180
Originally created by @geek1111 on GitHub (Mar 30, 2020). Original GitHub issue: https://github.com/tzapu/WiFiManager/issues/1028 ### Basic Infos #### Hardware **WiFimanager Branch/Release:** - [ ] Master - [x] Development 0.15-beta **Esp8266/Esp32:** - [x] ESP8266 - [ ] ESP32 **Hardware: ESP-12e, esp01, esp25** - [ ] ESP01 - [ ] ESP12 E/F/S (nodemcu, wemos, feather) - [x] Other ( ESP-07 ) **ESP Core Version: 2.4.0, staging** - [ ] 2.3.0 - [ ] 2.4.0 - [x] staging (master/dev) ### Description Hello I'm facing issue OnDemandConfigPortal sketch without any changes on ESP - 07 After a successful upload, I triggered the OnDemand event by pulling pin 0 low. when I try to connect the ESP - 07 it crashes and my mobile/laptop wifi disconnects with OnDemanAP and tries to connect again and it crashes in a loop. - [x] Tripple checked there are no power issues. - [x] Re-Flashed AT Firmware and uploaded the same sketch. - [x] Tried other examples available in the library. ( Similar Crash ) ### Settings in IDE - Board: Generic ESp8266 Module. - Upload Speed: 115200. - CPU Frequency: 80MHz. - Crystal Frequency: 26MHz. - Flash Size: 1MB (FS:64KB OTA:~470KB). - Flash Mode: Dout (compatible). - Flash Frequency: 40MHz. - Rest Method: dtr(aka nodemcu). - VTables: Flash. - Exceptions: Enabled. - Erase Flash: All Flash Contents. - Espressif FW: nonos-sdk 2.2.1 + 100 (190703) ### Sketch ```cpp #include <ESP8266WiFi.h> //https://github.com/esp8266/Arduino //needed for library #include <ESP8266WebServer.h> #include <DNSServer.h> #include <WiFiManager.h> //https://github.com/tzapu/WiFiManager // select which pin will trigger the configuration portal when set to LOW // ESP-01 users please note: the only pins available (0 and 2), are shared // with the bootloader, so always set them HIGH at power-up #define TRIGGER_PIN 0 void setup() { // put your setup code here, to run once: Serial.begin(115200); Serial.println("\n Starting"); pinMode(TRIGGER_PIN, INPUT); } void loop() { // is configuration portal requested? if ( digitalRead(TRIGGER_PIN) == LOW ) { //WiFiManager //Local intialization. Once its business is done, there is no need to keep it around WiFiManager wifiManager; //reset settings - for testing //wifiManager.resetSettings(); //sets timeout until configuration portal gets turned off //useful to make it all retry or go to sleep //in seconds //wifiManager.setTimeout(120); //it starts an access point with the specified name //here "AutoConnectAP" //and goes into a blocking loop awaiting configuration //WITHOUT THIS THE AP DOES NOT SEEM TO WORK PROPERLY WITH SDK 1.5 , update to at least 1.5.1 //WiFi.mode(WIFI_STA); if (!wifiManager.startConfigPortal("OnDemandAP")) { Serial.println("failed to connect and hit timeout"); delay(3000); //reset and try again, or maybe put it to deep sleep ESP.reset(); delay(5000); } //if you get here you have connected to the WiFi Serial.println("connected...yeey :)"); } // put your main code here, to run repeatedly: } ``` ### Debug Messages ``` Starting *WM: *WM: Configuring access point... *WM: OnDemandAP *WM: AP IP address: *WM: 192.168.4.1 *WM: HTTP server started Exception (9): epc1=0x40000e62 epc2=0x00000000 epc3=0x00000000 excvaddr=0x01000001 depc=0x00000000 >>>stack>>> ctx: cont sp: 3ffefb10 end: 3ffefdf0 offset: 01a0 3ffefcb0: 00000000 00000000 00000001 40100190 3ffefcc0: 4020d5e0 00000000 3ffefd40 401001b1 3ffefcd0: 00000000 00000000 3ffefd40 40208966 3ffefce0: 00000000 3ffeed88 3ffefd40 4020530e 3ffefcf0: 3ffefd50 3ffe87b9 00000020 401009cc 3ffefd00: 3ffefd50 3ffefd5c 3ffe87b9 402078fa 3ffefd10: 00000000 3ffe87b9 3ffefd40 40204de0 3ffefd20: 00000000 3fffdad0 3ffee8ec 3ffee8ec 3ffefd30: 3fffdad0 00000000 00000000 402010a0 3ffefd40: 3fff1254 3fff128c 3ffe8673 00000000 3ffefd50: 3ffe8600 00000000 80000a0d 40209800 3ffefd60: 3ffe86e6 80000000 00000000 00000000 3ffefd70: 00002f0e 4020d3a0 00000000 4020d3a0 3ffefd80: 00000000 4020d3a0 00000000 4020d3a0 3ffefd90: 00000000 4020d3a0 00000000 4020d3a0 3ffefda0: 00000000 00000000 ffffffff 40000001 3ffefdb0: 3ffe87b9 00000000 00010035 00000000 3ffefdc0: 00000000 0000000a 3fff1224 401001b1 3ffefdd0: feefeffe feefeffe 3ffee8ac 40208a58 3ffefde0: feefeffe feefeffe 3ffe84e0 40100c59 <<<stack<<< ets Jan 8 2013,rst cause:2, boot mode:(3,6) load 0x4010f000, len 1384, room 16 tail 8 chksum 0x2d csum 0x2d vbc204a9b ~ld ⸮cl {⸮ndph Starting ``` ### Decoded Exceptions ``` Exception 9: LoadStoreAlignmentCause: Load or store to an unaligned address PC: 0x40000e62 EXCVADDR: 0x01000001 Decoding stack results 0x40100190: ets_post(uint8, ETSSignal, ETSParam) at C:\Users\SURAJ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\core_esp8266_main.cpp line 160 0x401001b1: esp_schedule() at C:\Users\SURAJ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\core_esp8266_main.cpp line 113 0x40208966: __yield() at C:\Users\SURAJ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\core_esp8266_main.cpp line 99 0x4020530e: WiFiManager::startConfigPortal(char const*, char const*) at C:\Users\SURAJ\Documents\Arduino\libraries\WiFiManager\WiFiManager.cpp line 271 0x401009cc: malloc(size_t) at C:\Users\SURAJ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\umm_malloc\umm_malloc.cpp line 511 0x402078fa: String::String(char const*) at C:\Users\SURAJ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\WString.cpp line 36 0x40204de0: WiFiManager::WiFiManager() at C:\Users\SURAJ\Documents\Arduino\libraries\WiFiManager\WiFiManager.cpp line 72 0x402010a0: loop() at C:\Users\SURAJ\Documents\Arduino\libraries\WiFiManager\examples\OnDemandConfigPortal/OnDemandConfigPortal.ino line 45 0x40209800: uart_write(uart_t*, char const*, size_t) at C:\Users\SURAJ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\uart.cpp line 509 0x401001b1: esp_schedule() at C:\Users\SURAJ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\core_esp8266_main.cpp line 113 0x40208a58: loop_wrapper() at C:\Users\SURAJ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\core_esp8266_main.cpp line 180 ```
kerem commented 2026-02-28 01:27:27 +03:00
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@tablatronix commented on GitHub (Apr 1, 2020):

Interesting, have you erased flash ?

<!-- gh-comment-id:607017084 --> @tablatronix commented on GitHub (Apr 1, 2020): Interesting, have you erased flash ?
kerem commented 2026-02-28 01:27:27 +03:00
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@geek1111 commented on GitHub (Apr 1, 2020):

Yeah, Flash erased with esptool.py
after erase OnDemandPortal sketch worked for the first time and connected to AP as expected.
I tried one more time, It started HTTP Server and when I tried to connect with ESP-07 with Mobile/Laptop its started crashing with the same exception ( 9 ).

<!-- gh-comment-id:607184793 --> @geek1111 commented on GitHub (Apr 1, 2020): Yeah, Flash erased with esptool.py after erase OnDemandPortal sketch worked for the first time and connected to AP as expected. I tried one more time, It started HTTP Server and when I tried to connect with ESP-07 with Mobile/Laptop its started crashing with the same exception ( 9 ).
kerem commented 2026-02-28 01:27:27 +03:00
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@tablatronix commented on GitHub (Apr 1, 2020):

Might you have the wrong memory size selected, it sounds like running out of flash

<!-- gh-comment-id:607345284 --> @tablatronix commented on GitHub (Apr 1, 2020): Might you have the wrong memory size selected, it sounds like running out of flash
kerem commented 2026-02-28 01:27:27 +03:00
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@geek1111 commented on GitHub (Apr 2, 2020):

Can you please suggest to me what Flash Size needs to be selected? Tried 1MB size with different partition schemes available in Arduino IDE but no luck.

UPDATE

Tried Uploading sketch on some other ESP-07 with same settings.
I'm having a total of 6 ESP-07.
4 out of 6 are working without a crash, on the remaining two ESP-07 modules, Sketch crashing with the same reason.
What is the reason behind this crash, faulty memory chips? or modules are bricked?

<!-- gh-comment-id:607682305 --> @geek1111 commented on GitHub (Apr 2, 2020): Can you please suggest to me what Flash Size needs to be selected? Tried 1MB size with different partition schemes available in Arduino IDE but no luck. ### UPDATE Tried Uploading sketch on some other ESP-07 with **same settings**. I'm having a total of 6 ESP-07. 4 out of 6 are working without a crash, on the remaining two ESP-07 modules, Sketch crashing with the same reason. What is the reason behind this crash, faulty memory chips? or modules are bricked?
kerem commented 2026-02-28 01:27:27 +03:00
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@tablatronix commented on GitHub (Apr 2, 2020):

hmm, I dont know it looks like an sdk thing

Decoding stack results
0x40100190: ets_post(uint8, ETSSignal, ETSParam) at C:\Users\SURAJ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\core_esp8266_main.cpp line 160
0x401001b1: esp_schedule() at C:\Users\SURAJ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\core_esp8266_main.cpp line 113
0x40208966: __yield() at C:\Users\SURAJ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\core_esp8266_main.cpp line 99

Try a different esp version maybe

<!-- gh-comment-id:608036869 --> @tablatronix commented on GitHub (Apr 2, 2020): hmm, I dont know it looks like an sdk thing ``` Decoding stack results 0x40100190: ets_post(uint8, ETSSignal, ETSParam) at C:\Users\SURAJ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\core_esp8266_main.cpp line 160 0x401001b1: esp_schedule() at C:\Users\SURAJ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\core_esp8266_main.cpp line 113 0x40208966: __yield() at C:\Users\SURAJ\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.2\cores\esp8266\core_esp8266_main.cpp line 99 ``` Try a different esp version maybe
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