[GH-ISSUE #329] Crash when using WiFiManagerParameter

kerem commented

2026-02-28 01:24:27 +03:00

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Originally created by @daniftodi on GitHub (Mar 5, 2017).
Original GitHub issue: https://github.com/tzapu/WiFiManager/issues/329

Hi,

When using WiFiManager with custom parameters, when connecting to AP and trying to access configuration page, my devices restarts ( ESP-12-F ), here is the serial output:

*WM: BM29
*WM: -93
 
Exception (28):
epc1=0x4000bf64 epc2=0x00000000 epc3=0x00000000 excvaddr=0x0000014d depc=0x00000000
 
ctx: cont
sp: 3ffefe10 end: 3fff01a0 offset: 01a0

BM29 is the last Wifi network indentified by WiFiManager and I think before this, custom parameters are rendered.

Here is the source code that I'm using:

    char mqtt_server[40] = "mqtt server";
    char mqtt_port[6] = "8080";
    char mqtt_topic[63] = "mqtt/topic";

    WiFiManagerParameter custom_mqtt_server("server", "mqtt server", mqtt_server, 40);
    WiFiManagerParameter custom_mqtt_port("port", "mqtt port", mqtt_port, 6);
    WiFiManagerParameter custom_mqtt_topic("topic", "mqtt topic", mqtt_topic, 63);

    wifiManager.addParameter(&custom_mqtt_server);
    wifiManager.addParameter(&custom_mqtt_port);
    wifiManager.addParameter(&custom_mqtt_topic);
    wifiManager.setSaveConfigCallback(saveConfigCallback);
    if(!this->wifiManager.autoConnect(WIFI_SSID, WIFI_PASS)){
      ESP.reset();
      delay(5000);
    }

Help me please figure what is wrong with my code and what should I do.

Originally created by @daniftodi on GitHub (Mar 5, 2017). Original GitHub issue: https://github.com/tzapu/WiFiManager/issues/329 Hi, When using WiFiManager with custom parameters, when connecting to AP and trying to access configuration page, my devices restarts ( ESP-12-F ), here is the serial output: ``` *WM: BM29 *WM: -93 Exception (28): epc1=0x4000bf64 epc2=0x00000000 epc3=0x00000000 excvaddr=0x0000014d depc=0x00000000 ctx: cont sp: 3ffefe10 end: 3fff01a0 offset: 01a0 ``` BM29 is the last Wifi network indentified by WiFiManager and I think before this, custom parameters are rendered. Here is the source code that I'm using: ``` char mqtt_server[40] = "mqtt server"; char mqtt_port[6] = "8080"; char mqtt_topic[63] = "mqtt/topic"; WiFiManagerParameter custom_mqtt_server("server", "mqtt server", mqtt_server, 40); WiFiManagerParameter custom_mqtt_port("port", "mqtt port", mqtt_port, 6); WiFiManagerParameter custom_mqtt_topic("topic", "mqtt topic", mqtt_topic, 63); wifiManager.addParameter(&custom_mqtt_server); wifiManager.addParameter(&custom_mqtt_port); wifiManager.addParameter(&custom_mqtt_topic); wifiManager.setSaveConfigCallback(saveConfigCallback); if(!this->wifiManager.autoConnect(WIFI_SSID, WIFI_PASS)){ ESP.reset(); delay(5000); } ``` Help me please figure what is wrong with my code and what should I do.

kerem closed this issue

2026-02-28 01:24:27 +03:00

kerem commented

2026-02-28 01:24:28 +03:00

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@rkoptev commented on GitHub (Sep 9, 2017):

Having the same issue.
Here is my code:

  // Configure Wi-Fi manager portal and start it
  WiFiManagerParameter custom_device_id("device_id", "Device ID", device_id, PARAM_SIZE_DEVICE_ID);
  WiFiManagerParameter custom_oauth_token("oauth_token", "Oauth token", oauth_token, PARAM_SIZE_OAUTH_TOKEN);
  wifiManager.addParameter(&custom_device_id);
  wifiManager.addParameter(&custom_oauth_token);
  wifiManager.setSaveConfigCallback(saveConfigCallback);
  wifiManager.autoConnect(WIFI_AP_NAME);

It lloks like WiFiManagr consumes too much RAM:

Fatal exception 29(StoreProhibitedCause):
epc1=0x4000e1c3, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000018, depc=0x00000000

Exception (29):
epc1=0x4000e1c3 epc2=0x00000000 epc3=0x00000000 excvaddr=0x00000018 depc=0x00000000

ctx: sys
sp: 3ffffc80 end: 3fffffb0 offset: 01a0

stack>>>
3ffffe20: ffffff80 3ffef190 00000000 00000001
3ffffe30: 4021dc5d 4021db9a 3fff2dbc e0031035
3ffffe40: 00000018 3ffefb40 3ffefabc 00000000
3ffffe50: 4021dcf8 3ff20a00 3fff2dbc 3ffecc7e
3ffffe60: 3ffecc64 0000000e 00000000 3ffecc64
3ffffe70: 3ffecc7e 0000002c 00000008 401004f4
3ffffe80: 3ffecc6e 3fff3344 4021aa4f 3ff20a00
3ffffe90: 3fff2dbc 3fff4e54 00000015 4021a921
3ffffea0: 402113a1 00000030 0000001a ffffffff
3ffffeb0: 40211393 3fff13b0 40211418 3fffd9d0
3ffffec0: 00000000 00000000 00000000 fffffffe
3ffffed0: ffffffff 3fffc6fc 00000001 3fff13b0
3ffffee0: 00000000 3fffdad0 3fff13a8 00000030
3ffffef0: 00000000 3fffdad0 3fff13a8 00000030
3fffff00: 401068c4 00000000 00000007 401004d8
3fffff10: 40221eb9 ffffffa7 00000000 00000000
3fffff20: 4021a1b9 3ffecc64 3ffef190 3fff2dbc
3fffff30: 00000000 3ffecc6e 3ffecc84 3ffeb534
3fffff40: 40215624 00000000 3ffecc6e 3ffecc64
3fffff50: 00000058 3ffeb534 3fff3344 3ffecc58
3fffff60: 00000000 00000007 40215256 3ffef190
3fffff70: 3ffecc58 3fffdcc0 3ffeb7f8 3fff3064
3fffff80: 3ffecc74 00000040 00000000 3fff13b0
3fffff90: 40214ba3 3fffdab0 00000000 402113a7
3fffffa0: 3ffeb7f8 40000f49 3fffdab0 40000f49
<<<stack<<<

Here is the output from ESP exception decoder:
Decoding 19 results
0x4021dc5d: wpa_receive at ?? line ?
0x4021db9a: wpa_receive at ?? line ?
0x4021dcf8: wpa_receive at ?? line ?
0x401004f4: calloc at C:\Users\Ruslan\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\cores\esp8266\umm_malloc/umm_malloc.c line 1684
0x4021aa4f: chm_end_op at ?? line ?
0x4021a921: chm_init at ?? line ?
0x402113a1: esf_buf_setup at ?? line ?
0x40211393: esf_buf_setup at ?? line ?
0x40211418: esf_buf_setup at ?? line ?
0x401068c4: __divsf3_aux at d:\ivan\projects\arduinoesp\toolchain\dl\gcc-xtensa\build-2\xtensa-lx106-elf\libgcc/../../../libgcc/config/xtensa/ieee754-sf.S line 915
0x401004d8: malloc at C:\Users\Ruslan\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\cores\esp8266\umm_malloc/umm_malloc.c line 1664
0x40221eb9: rijndaelEncrypt at ?? line ?
0x4021a1b9: sta_input at ?? line ?
0x40215624: ieee80211_setup_basic_htrates at ?? line ?
0x40215256: ieee80211_ht_node_cleanup at ?? line ?
0x40214ba3: hostap_input at ?? line ?
0x402113a7: esf_buf_setup at ?? line ?

@rkoptev commented on GitHub (Sep 9, 2017): Having the same issue. Here is my code: ``` // Configure Wi-Fi manager portal and start it WiFiManagerParameter custom_device_id("device_id", "Device ID", device_id, PARAM_SIZE_DEVICE_ID); WiFiManagerParameter custom_oauth_token("oauth_token", "Oauth token", oauth_token, PARAM_SIZE_OAUTH_TOKEN); wifiManager.addParameter(&custom_device_id); wifiManager.addParameter(&custom_oauth_token); wifiManager.setSaveConfigCallback(saveConfigCallback); wifiManager.autoConnect(WIFI_AP_NAME); ``` It lloks like WiFiManagr consumes too much RAM: Fatal exception 29(StoreProhibitedCause): epc1=0x4000e1c3, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000018, depc=0x00000000 Exception (29): epc1=0x4000e1c3 epc2=0x00000000 epc3=0x00000000 excvaddr=0x00000018 depc=0x00000000 ctx: sys sp: 3ffffc80 end: 3fffffb0 offset: 01a0 >>>stack>>> 3ffffe20: ffffff80 3ffef190 00000000 00000001 3ffffe30: 4021dc5d 4021db9a 3fff2dbc e0031035 3ffffe40: 00000018 3ffefb40 3ffefabc 00000000 3ffffe50: 4021dcf8 3ff20a00 3fff2dbc 3ffecc7e 3ffffe60: 3ffecc64 0000000e 00000000 3ffecc64 3ffffe70: 3ffecc7e 0000002c 00000008 401004f4 3ffffe80: 3ffecc6e 3fff3344 4021aa4f 3ff20a00 3ffffe90: 3fff2dbc 3fff4e54 00000015 4021a921 3ffffea0: 402113a1 00000030 0000001a ffffffff 3ffffeb0: 40211393 3fff13b0 40211418 3fffd9d0 3ffffec0: 00000000 00000000 00000000 fffffffe 3ffffed0: ffffffff 3fffc6fc 00000001 3fff13b0 3ffffee0: 00000000 3fffdad0 3fff13a8 00000030 3ffffef0: 00000000 3fffdad0 3fff13a8 00000030 3fffff00: 401068c4 00000000 00000007 401004d8 3fffff10: 40221eb9 ffffffa7 00000000 00000000 3fffff20: 4021a1b9 3ffecc64 3ffef190 3fff2dbc 3fffff30: 00000000 3ffecc6e 3ffecc84 3ffeb534 3fffff40: 40215624 00000000 3ffecc6e 3ffecc64 3fffff50: 00000058 3ffeb534 3fff3344 3ffecc58 3fffff60: 00000000 00000007 40215256 3ffef190 3fffff70: 3ffecc58 3fffdcc0 3ffeb7f8 3fff3064 3fffff80: 3ffecc74 00000040 00000000 3fff13b0 3fffff90: 40214ba3 3fffdab0 00000000 402113a7 3fffffa0: 3ffeb7f8 40000f49 3fffdab0 40000f49 <<<stack<<< Here is the output from ESP exception decoder: Decoding 19 results 0x4021dc5d: wpa_receive at ?? line ? 0x4021db9a: wpa_receive at ?? line ? 0x4021dcf8: wpa_receive at ?? line ? 0x401004f4: calloc at C:\Users\Ruslan\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\cores\esp8266\umm_malloc/umm_malloc.c line 1684 0x4021aa4f: chm_end_op at ?? line ? 0x4021a921: chm_init at ?? line ? 0x402113a1: esf_buf_setup at ?? line ? 0x40211393: esf_buf_setup at ?? line ? 0x40211418: esf_buf_setup at ?? line ? 0x401068c4: __divsf3_aux at d:\ivan\projects\arduinoesp\toolchain\dl\gcc-xtensa\build-2\xtensa-lx106-elf\libgcc/../../../libgcc/config/xtensa/ieee754-sf.S line 915 0x401004d8: malloc at C:\Users\Ruslan\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\cores\esp8266\umm_malloc/umm_malloc.c line 1664 0x40221eb9: rijndaelEncrypt at ?? line ? 0x4021a1b9: sta_input at ?? line ? 0x40215624: ieee80211_setup_basic_htrates at ?? line ? 0x40215256: ieee80211_ht_node_cleanup at ?? line ? 0x40214ba3: hostap_input at ?? line ? 0x402113a7: esf_buf_setup at ?? line ?

kerem commented

2026-02-28 01:24:28 +03:00

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@tablatronix commented on GitHub (Sep 9, 2017):

what branch ?
which esp core?

@tablatronix commented on GitHub (Sep 9, 2017): what branch ? which esp core?

kerem commented

2026-02-28 01:24:28 +03:00

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@rkoptev commented on GitHub (Sep 9, 2017):

I'm using ESP12E module from AI-Thinker. In Arduino IDE I selected NodeMCU 1.0(ESP-12E module)

What wifimanager branch or release?

@rkoptev commented on GitHub (Sep 9, 2017): I'm using ESP12E module from AI-Thinker. In Arduino IDE I selected NodeMCU 1.0(ESP-12E module) What wifimanager branch or release?

kerem commented

2026-02-28 01:24:28 +03:00

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@tablatronix commented on GitHub (Sep 9, 2017):

Oops I edited your post
What version branch of wifimanager?

@tablatronix commented on GitHub (Sep 9, 2017): Oops I edited your post What version branch of wifimanager?

kerem commented

2026-02-28 01:24:28 +03:00

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@rkoptev commented on GitHub (Sep 9, 2017):

As mentioned in library.properties file: version=0.12
Basically, the last version

@rkoptev commented on GitHub (Sep 9, 2017): As mentioned in library.properties file: version=0.12 Basically, the last version

kerem commented

2026-02-28 01:24:28 +03:00

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@tablatronix commented on GitHub (Sep 9, 2017):

Ok cause I think they all say the same
Making sure you are not using dev or kentaylor branch forks

Ill see if i can reproduce

@tablatronix commented on GitHub (Sep 9, 2017): Ok cause I think they all say the same Making sure you are not using dev or kentaylor branch forks Ill see if i can reproduce

kerem commented

2026-02-28 01:24:28 +03:00

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@rkoptev commented on GitHub (Sep 13, 2017):

It seems that I managed to make some progress in solving this problem. I began to disable the libraries in my sketch in turn. WiFiManager started working correctly after I disabled SoftwareSerial library that I use to recieve data from GPS sensor.

I assumed that the matter is in timers or interrupts. Perhaps interrupts that are used in esp SoftwareSerial library to get data from the sensor prevent the work of the WiFiManager. I analyzed this library, and found out that when creating an softserial object, constructor calls enableRx() method that calls this:
attachInterrupt(m_rxPin, ISRList[m_rxPin], m_invert ? RISING : FALLING);

I can not be sure, but it seems to me that this was the main problem. In any case, I managed to solve this problem by calling enableRx(0) before starting WiFiManager.

@rkoptev commented on GitHub (Sep 13, 2017): It seems that I managed to make some progress in solving this problem. I began to disable the libraries in my sketch in turn. WiFiManager started working correctly after I disabled SoftwareSerial library that I use to recieve data from GPS sensor. I assumed that the matter is in timers or interrupts. Perhaps interrupts that are used in esp SoftwareSerial library to get data from the sensor prevent the work of the WiFiManager. I analyzed this library, and found out that when creating an softserial object, constructor calls enableRx() method that calls this: `attachInterrupt(m_rxPin, ISRList[m_rxPin], m_invert ? RISING : FALLING);` I can not be sure, but it seems to me that this was the main problem. In any case, I managed to solve this problem by calling enableRx(0) before starting WiFiManager.

kerem commented

2026-02-28 01:24:28 +03:00

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@tablatronix commented on GitHub (Sep 13, 2017):

Also make sure you are never doing work inside an interrupt, instead use flag states or some other way,

@tablatronix commented on GitHub (Sep 13, 2017): Also make sure you are never doing work inside an interrupt, instead use flag states or some other way,

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[GH-ISSUE #329] Crash when using WiFiManagerParameter #274