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[GH-ISSUE #679] Master: Sometimes crash after User requested captive portal #568

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opened 2026-02-28 01:25:54 +03:00 by kerem · 11 comments
kerem commented 2026-02-28 01:25:54 +03:00
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Originally created by @dontsovcmc on GitHub (Jul 27, 2018).
Original GitHub issue: https://github.com/tzapu/WiFiManager/issues/679

I user master branch for stability, but sometimes got loop exceptions when boot, read smth by i2c and start Wi-Fi connecting.

I can't understand the reason. I check turn on 2 times after firmwaring...

I know, that I should use development branch. My first experience got an error (with buffer lenght) and I return to master branch. Maybe I can help with development?

Exception decoder:

Decoding 42 results
0x401004f4: calloc at ?? line ?
0x40106b98: pvPortZalloc at ?? line ?
0x4010577c: spi_flash_read at ?? line ?
0x40236131: wifi_param_save_protect_with_check at ?? line ?
0x401063f1: __wrap_spi_flash_read at ?? line ?
0x4023621b: system_param_save_with_protect at ?? line ?
0x402361fe: system_param_save_with_protect at ?? line ?
0x402366e8: wifi_station_ap_number_set at ?? line ?
0x401063f1: __wrap_spi_flash_read at ?? line ?
0x40236902: wifi_station_ap_number_set at ?? line ?
0x402369ba: wifi_station_ap_number_set at ?? line ?
0x4024d990: sleep_reset_analog_rtcreg_8266 at ?? line ?
0x40236989: wifi_station_ap_number_set at ?? line ?
0x402369f0: wifi_station_set_config at ?? line ?
0x40206cb4: ESP8266WiFiSTAClass::disconnect(bool) at ?? line ?
0x40213b00: __ssputs_r at /Users/igrokhotkov/e/newlib-xtensa/xtensa-lx106-elf/newlib/libc/stdio/../../../.././newlib/libc/stdio/nano-vfprintf.c line 180
0x4020febc: _printf_i at /Users/igrokhotkov/e/newlib-xtensa/xtensa-lx106-elf/newlib/libc/stdio/../../../.././newlib/libc/stdio/nano-vfprintf_i.c line 241
0x40213f60: _svfprintf_r at /Users/igrokhotkov/e/newlib-xtensa/xtensa-lx106-elf/newlib/libc/stdio/../../../.././newlib/libc/stdio/nano-vfprintf.c line 641
0x4020ee94: Print::write(unsigned char const*, unsigned int) at ?? line ?
0x4020a311: Print::write(char const*) at ?? line ?
0x4020a324: Print::print(char const*) at ?? line ?
0x40205a02: setup_ap(Settings&, SlaveData const&, float const&, float const&) at ?? line ?
0x4020a311: Print::write(char const*) at ?? line ?
0x4020ee94: Print::write(unsigned char const*, unsigned int) at ?? line ?
0x4020a311: Print::write(char const*) at ?? line ?
0x4020a44d: Print::printNumber(unsigned long, unsigned char) at ?? line ?
0x40210624: sprintf at /Users/igrokhotkov/e/newlib-xtensa/xtensa-lx106-elf/newlib/libc/stdio/../../../.././newlib/libc/stdio/sprintf.c line 646
0x4020ee94: Print::write(unsigned char const*, unsigned int) at ?? line ?
0x4020ee94: Print::write(unsigned char const*, unsigned int) at ?? line ?
0x4020a4ab: Print::print(long, int) at ?? line ?
0x4020ee94: Print::write(unsigned char const*, unsigned int) at ?? line ?
0x4020a311: Print::write(char const*) at ?? line ?
0x4020a324: Print::print(char const*) at ?? line ?
0x40240000: etharp_tmr at netif/etharp.c line 232
0x40202ea0: calculate_values(Settings&, SlaveData&, float*, float*) at ?? line ?
0x4020a50e: Print::print(unsigned long, int) at ?? line ?
0x4020469c: loop at ?? line ?
0x40209fb4: EspClass::wdtDisable() at ?? line ?
0x40202bda: setup at ?? line ?
0x4020b420: loop_wrapper() at core_esp8266_main.cpp line ?
0x40100700: cont_norm at cont.S.o line ?

----------------------------- Remove above -----------------------------

Basic Infos

Hardware

WiFimanager Branch/Release: Master
Esp8266-01

Core Version:
Platform: Espressif 8266 1.7.3

Settings in IDE

PlatformIO:
[env:esp01_1m]
board = esp01_1m
platform = espressif8266
framework = arduino

Debug Messages

ets Jan  8 2013,rst cause:2, boot mode:(3,5)

load 0x4010f000, len 1384, room 16 
tail 8
chksum 0x2d
csum 0x2d
v614f7c32
~ld
000:00:00:00:050  NOTICE    (ESP) : Booted
1 000:00:00:00:053  NOTICE    (I2C) : mode=1
4 1 E4 B 0 0 9 0 0 0 31 0 0 0 000:00:00:00:065  NOTICE    (I2C) : version: 4
000:00:00:00:065  NOTICE    (I2C) : service: 1
000:00:00:00:065  NOTICE    (I2C) : voltage: 3044
000:00:00:00:067  NOTICE    (I2C) : impulses0: 9
000:00:00:00:071  NOTICE    (I2C) : impulses1: 49
000:00:00:00:075  NOTICE    (WIF) : key=x email=, hostname=blynk-cloud.com
000:00:00:00:085  NOTICE    (WIF) : value0_start=0.06, impules0_start=5, factor=10
000:00:00:00:092  NOTICE    (WIF) : value1_start=0.45, impules1_start=44
000:00:00:00:098  NOTICE    (ESP) : new impulses=9 49
000:00:00:00:103  NOTICE    (ESP) : new values=0.10 0.50
000:00:00:00:108  NOTICE    (ESP) : I2C-begined: mode SETUP
000:00:00:00:113  NOTICE    (WIF) : User requested captive portal

Exception (3):
epc1=0x401003e9 epc2=0x00000000 epc3=0x00000000 excvaddr=0x4006ed31 depc=0x00000000

ctx: cont 
sp: 3fff0740 end: 3fff0cc0 offset: 01a0
Originally created by @dontsovcmc on GitHub (Jul 27, 2018). Original GitHub issue: https://github.com/tzapu/WiFiManager/issues/679 I user master branch for stability, but sometimes got loop exceptions when boot, read smth by i2c and start Wi-Fi connecting. I can't understand the reason. I check turn on 2 times after firmwaring... I know, that I should use development branch. My first experience got an error (with buffer lenght) and I return to master branch. Maybe I can help with development? Exception decoder: ``` Decoding 42 results 0x401004f4: calloc at ?? line ? 0x40106b98: pvPortZalloc at ?? line ? 0x4010577c: spi_flash_read at ?? line ? 0x40236131: wifi_param_save_protect_with_check at ?? line ? 0x401063f1: __wrap_spi_flash_read at ?? line ? 0x4023621b: system_param_save_with_protect at ?? line ? 0x402361fe: system_param_save_with_protect at ?? line ? 0x402366e8: wifi_station_ap_number_set at ?? line ? 0x401063f1: __wrap_spi_flash_read at ?? line ? 0x40236902: wifi_station_ap_number_set at ?? line ? 0x402369ba: wifi_station_ap_number_set at ?? line ? 0x4024d990: sleep_reset_analog_rtcreg_8266 at ?? line ? 0x40236989: wifi_station_ap_number_set at ?? line ? 0x402369f0: wifi_station_set_config at ?? line ? 0x40206cb4: ESP8266WiFiSTAClass::disconnect(bool) at ?? line ? 0x40213b00: __ssputs_r at /Users/igrokhotkov/e/newlib-xtensa/xtensa-lx106-elf/newlib/libc/stdio/../../../.././newlib/libc/stdio/nano-vfprintf.c line 180 0x4020febc: _printf_i at /Users/igrokhotkov/e/newlib-xtensa/xtensa-lx106-elf/newlib/libc/stdio/../../../.././newlib/libc/stdio/nano-vfprintf_i.c line 241 0x40213f60: _svfprintf_r at /Users/igrokhotkov/e/newlib-xtensa/xtensa-lx106-elf/newlib/libc/stdio/../../../.././newlib/libc/stdio/nano-vfprintf.c line 641 0x4020ee94: Print::write(unsigned char const*, unsigned int) at ?? line ? 0x4020a311: Print::write(char const*) at ?? line ? 0x4020a324: Print::print(char const*) at ?? line ? 0x40205a02: setup_ap(Settings&, SlaveData const&, float const&, float const&) at ?? line ? 0x4020a311: Print::write(char const*) at ?? line ? 0x4020ee94: Print::write(unsigned char const*, unsigned int) at ?? line ? 0x4020a311: Print::write(char const*) at ?? line ? 0x4020a44d: Print::printNumber(unsigned long, unsigned char) at ?? line ? 0x40210624: sprintf at /Users/igrokhotkov/e/newlib-xtensa/xtensa-lx106-elf/newlib/libc/stdio/../../../.././newlib/libc/stdio/sprintf.c line 646 0x4020ee94: Print::write(unsigned char const*, unsigned int) at ?? line ? 0x4020ee94: Print::write(unsigned char const*, unsigned int) at ?? line ? 0x4020a4ab: Print::print(long, int) at ?? line ? 0x4020ee94: Print::write(unsigned char const*, unsigned int) at ?? line ? 0x4020a311: Print::write(char const*) at ?? line ? 0x4020a324: Print::print(char const*) at ?? line ? 0x40240000: etharp_tmr at netif/etharp.c line 232 0x40202ea0: calculate_values(Settings&, SlaveData&, float*, float*) at ?? line ? 0x4020a50e: Print::print(unsigned long, int) at ?? line ? 0x4020469c: loop at ?? line ? 0x40209fb4: EspClass::wdtDisable() at ?? line ? 0x40202bda: setup at ?? line ? 0x4020b420: loop_wrapper() at core_esp8266_main.cpp line ? 0x40100700: cont_norm at cont.S.o line ? ``` ----------------------------- Remove above ----------------------------- ### Basic Infos #### Hardware WiFimanager Branch/Release: Master Esp8266-01 Core Version: Platform: Espressif 8266 1.7.3 ### Settings in IDE PlatformIO: [env:esp01_1m] board = esp01_1m platform = espressif8266 framework = arduino ### Debug Messages ``` ets Jan 8 2013,rst cause:2, boot mode:(3,5) load 0x4010f000, len 1384, room 16 tail 8 chksum 0x2d csum 0x2d v614f7c32 ~ld 000:00:00:00:050 NOTICE (ESP) : Booted 1 000:00:00:00:053 NOTICE (I2C) : mode=1 4 1 E4 B 0 0 9 0 0 0 31 0 0 0 000:00:00:00:065 NOTICE (I2C) : version: 4 000:00:00:00:065 NOTICE (I2C) : service: 1 000:00:00:00:065 NOTICE (I2C) : voltage: 3044 000:00:00:00:067 NOTICE (I2C) : impulses0: 9 000:00:00:00:071 NOTICE (I2C) : impulses1: 49 000:00:00:00:075 NOTICE (WIF) : key=x email=, hostname=blynk-cloud.com 000:00:00:00:085 NOTICE (WIF) : value0_start=0.06, impules0_start=5, factor=10 000:00:00:00:092 NOTICE (WIF) : value1_start=0.45, impules1_start=44 000:00:00:00:098 NOTICE (ESP) : new impulses=9 49 000:00:00:00:103 NOTICE (ESP) : new values=0.10 0.50 000:00:00:00:108 NOTICE (ESP) : I2C-begined: mode SETUP 000:00:00:00:113 NOTICE (WIF) : User requested captive portal Exception (3): epc1=0x401003e9 epc2=0x00000000 epc3=0x00000000 excvaddr=0x4006ed31 depc=0x00000000 ctx: cont sp: 3fff0740 end: 3fff0cc0 offset: 01a0 ```
kerem closed this issue 2026-02-28 01:25:54 +03:00
kerem commented 2026-02-28 01:25:55 +03:00
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@tablatronix commented on GitHub (Jul 27, 2018):

Shrug, maybe someone will see this and help.
But no fixes or dev will be done on master, hotfixes has some fixes.

Are you using parameters?

Have you erased flash.

Have you tried esp staging?

<!-- gh-comment-id:408559805 --> @tablatronix commented on GitHub (Jul 27, 2018): Shrug, maybe someone will see this and help. But no fixes or dev will be done on master, hotfixes has some fixes. Are you using parameters? Have you erased flash. Have you tried esp staging?
kerem commented 2026-02-28 01:25:55 +03:00
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@tablatronix commented on GitHub (Jul 27, 2018):

Could be out of memory, I have not done any testing on esp01 at all personallly

<!-- gh-comment-id:408560008 --> @tablatronix commented on GitHub (Jul 27, 2018): Could be out of memory, I have not done any testing on esp01 at all personallly
kerem commented 2026-02-28 01:25:55 +03:00
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@tablatronix commented on GitHub (Jul 27, 2018):

What esp lib version are you using?
I doubt 1.7.3 that would be 3 years old

<!-- gh-comment-id:408562333 --> @tablatronix commented on GitHub (Jul 27, 2018): What esp lib version are you using? I doubt 1.7.3 that would be 3 years old
kerem commented 2026-02-28 01:25:55 +03:00
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@dontsovcmc commented on GitHub (Jul 28, 2018):

I have a lot of parameters:

I mean platformio platform version: https://github.com/platformio/platform-espressif8266
This is compile options

#define KEY_LEN 34
#define HOSTNAME_LEN 32

#define EMAIL_LEN 32
#define EMAIL_TITLE_LEN 64
#define EMAIL_TEMPLATE_LEN 200
...
	WiFiManagerParameter param_key( "key", "key",  sett.key, KEY_LEN );
	wifiManager.addParameter( &param_key );
	WiFiManagerParameter param_hostname( "host", "host",  sett.hostname, HOSTNAME_LEN );
	wifiManager.addParameter( &param_hostname );
	WiFiManagerParameter param_email( "email", "email",  sett.email, EMAIL_LEN );
	wifiManager.addParameter( &param_email );
	WiFiManagerParameter param_email_title( "title", "title",  sett.email_title, EMAIL_TITLE_LEN );
	wifiManager.addParameter( &param_email_title );
	WiFiManagerParameter param_email_template( "template", "template",  sett.email_template, EMAIL_TEMPLATE_LEN );
	wifiManager.addParameter( &param_email_template );
	FloatParameter param_value0_start( "value0", "value0",  value0);
	wifiManager.addParameter( &param_value0_start );
	FloatParameter param_value1_start( "value1", "value1",  value1);
	wifiManager.addParameter( &param_value1_start );
	LongParameter param_litres_per_imp( "factor", "factor",  sett.liters_per_impuls);
	wifiManager.addParameter( &param_litres_per_imp );
<!-- gh-comment-id:408598958 --> @dontsovcmc commented on GitHub (Jul 28, 2018): I have a lot of parameters: I mean platformio platform version: https://github.com/platformio/platform-espressif8266 This is [compile options](https://github.com/platformio/platform-espressif8266/blob/develop/boards/esp01_1m.json) ``` #define KEY_LEN 34 #define HOSTNAME_LEN 32 #define EMAIL_LEN 32 #define EMAIL_TITLE_LEN 64 #define EMAIL_TEMPLATE_LEN 200 ... WiFiManagerParameter param_key( "key", "key", sett.key, KEY_LEN ); wifiManager.addParameter( &param_key ); WiFiManagerParameter param_hostname( "host", "host", sett.hostname, HOSTNAME_LEN ); wifiManager.addParameter( &param_hostname ); WiFiManagerParameter param_email( "email", "email", sett.email, EMAIL_LEN ); wifiManager.addParameter( &param_email ); WiFiManagerParameter param_email_title( "title", "title", sett.email_title, EMAIL_TITLE_LEN ); wifiManager.addParameter( &param_email_title ); WiFiManagerParameter param_email_template( "template", "template", sett.email_template, EMAIL_TEMPLATE_LEN ); wifiManager.addParameter( &param_email_template ); FloatParameter param_value0_start( "value0", "value0", value0); wifiManager.addParameter( &param_value0_start ); FloatParameter param_value1_start( "value1", "value1", value1); wifiManager.addParameter( &param_value1_start ); LongParameter param_litres_per_imp( "factor", "factor", sett.liters_per_impuls); wifiManager.addParameter( &param_litres_per_imp ); ```
kerem commented 2026-02-28 01:25:55 +03:00
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@liebman commented on GitHub (Jul 28, 2018):

If you declare a lot of parameters in a function (on the stack) you will exceed the stack size and memory will be corrupted. You may need to use the new operator for the allocation and then the delete operator to free them. (I had this issue with 31 parameters)

<!-- gh-comment-id:408610666 --> @liebman commented on GitHub (Jul 28, 2018): If you declare a lot of parameters in a function (on the stack) you will exceed the stack size and memory will be corrupted. You may need to use the `new` operator for the allocation and then the `delete` operator to free them. (I had this issue with 31 parameters)
kerem commented 2026-02-28 01:25:55 +03:00
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@dontsovcmc commented on GitHub (Jul 28, 2018):

If the reason is the stack, why this problem is presented not 100% times?
Maybe I can print Stack size in the log?

<!-- gh-comment-id:408615225 --> @dontsovcmc commented on GitHub (Jul 28, 2018): If the reason is the stack, why this problem is presented not 100% times? Maybe I can print Stack size in the log?
kerem commented 2026-02-28 01:25:55 +03:00
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@liebman commented on GitHub (Jul 28, 2018):

If I recall correctly the default stack size is only 4k. I don't recall whats adjacent to it, I think its the heap. So it would depend on if that particular memory location is in use or not.

<!-- gh-comment-id:408616797 --> @liebman commented on GitHub (Jul 28, 2018): If I recall correctly the default stack size is only 4k. I don't recall whats adjacent to it, I think its the heap. So it would depend on if that particular memory location is in use or not.
kerem commented 2026-02-28 01:25:55 +03:00
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@tablatronix commented on GitHub (Jul 28, 2018):

Yup I have thought about this and how to provide warnings but heap size is hard to measure if you do not have a way to know its initial state before the library loads, in dev version I have added heap info to the info page to kind of help woth these issues.

<!-- gh-comment-id:408632877 --> @tablatronix commented on GitHub (Jul 28, 2018): Yup I have thought about this and how to provide warnings but heap size is hard to measure if you do not have a way to know its initial state before the library loads, in dev version I have added heap info to the info page to kind of help woth these issues.
kerem commented 2026-02-28 01:25:55 +03:00
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@dontsovcmc commented on GitHub (Jul 31, 2018):

Are stack size is different in different running?

As I use cyrillic string values, sometimes I see terrible data in log:

*WM: &#1053;&#1086;&#1074;&#1099;&#1077; &#1087;&#1086;&#1082;&#1072;
*WM: Parameter
*WM: template
*WM: &#1043;&#1042;&#1057;: {V0} &#1084;3, &#1061;&#1042;&#1057;: {V1} &#1084;3<br>&#1076;&#1077;&#1083;&#1100;&#1090;&#1072;:<br>&#1075;&#1074;&#1089;: +{V3}, &#1093;&#1074;&#1089;: +{V4}<br>&#1087;&#1080;
*WM: Parameter
<!-- gh-comment-id:409053317 --> @dontsovcmc commented on GitHub (Jul 31, 2018): Are stack size is different in different running? As I use cyrillic string values, sometimes I see terrible data in log: ``` *WM: &#1053;&#1086;&#1074;&#1099;&#1077; &#1087;&#1086;&#1082;&#1072; *WM: Parameter *WM: template *WM: &#1043;&#1042;&#1057;: {V0} &#1084;3, &#1061;&#1042;&#1057;: {V1} &#1084;3<br>&#1076;&#1077;&#1083;&#1100;&#1090;&#1072;:<br>&#1075;&#1074;&#1089;: +{V3}, &#1093;&#1074;&#1089;: +{V4}<br>&#1087;&#1080; *WM: Parameter ```
kerem commented 2026-02-28 01:25:55 +03:00
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@dontsovcmc commented on GitHub (Aug 4, 2018):

WiFimanager Branch/Release: Master

I think there is no problem with stack and there is no problem with strings.

Crash when I call:
WiFi.disconnect( true );
before run Active Point.

But I don't know why I called this function...
I read, that it erases current SSID and password. I don't need it.

I see example OnDemandConfigPortal without any additional functions.

<!-- gh-comment-id:410437874 --> @dontsovcmc commented on GitHub (Aug 4, 2018): WiFimanager Branch/Release: Master I think there is no problem with stack and there is no problem with strings. Crash when I call: `WiFi.disconnect( true );` before run Active Point. But I don't know why I called this function... I read, that it erases current SSID and password. I don't need it. I see example [OnDemandConfigPortal](https://github.com/tzapu/WiFiManager/blob/development/examples/OnDemandConfigPortal/OnDemandConfigPortal.ino) without any additional functions.
kerem commented 2026-02-28 01:25:55 +03:00
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@tablatronix commented on GitHub (Aug 4, 2018):

Known esp bug update your library

<!-- gh-comment-id:410463665 --> @tablatronix commented on GitHub (Aug 4, 2018): Known esp bug update your library
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