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AlexM600 opened this issue Apr 20, 2016 · 6 comments
Closed

Fatal exception 0(IllegalInstructionCause): #1950

AlexM600 opened this issue Apr 20, 2016 · 6 comments

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@AlexM600
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Basic Infos

I'm trying to use ESP-01 module as small webserver.

Hardware

Hardware: ESP-01
Core Version: 2.2.0

Description

It works on my home AP, on my Android phone AP.
But has Fatal Exception in 10-20 seconds on my work AP. Tried to set different settings on it, change channels, mode, speed, disable encryption and so on.. ESP crashes
Other WiFi clients work fine.

Settings in IDE

Module: Generic ESP8266 Module
Flash Size: 1MB
CPU Frequency: 80Mhz
Flash Mode: qio
Flash Frequency: 40Mhz
Reset Method: ck

Sketch

Standard example from libraries/ESP8266WebServer/examples/HelloServer/HelloServer.ino
Just changed ssid

Debug Messages

wifi evt: 0
..wifi evt: 7
wifi evt: 7
.wifi evt: 7
wifi evt: 7
..wifi evt: 3
.
Connected to GOR30
IP address: 192.168.10.20
MDNS responder started
HTTP server started
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
wifi evt: 7
Fatal exception 0(IllegalInstructionCause):
epc1=0x40106992, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000, depc=0x00000000

Exception (0):
epc1=0x40106992 epc2=0x00000000 epc3=0x00000000 excvaddr=0x00000000 depc=0x00000000

ctx: sys
sp: 3ffffd80 end: 3fffffb0 offset: 01a0

stack>>>
3fffff20: 40226457 d334fe18 4021024c 3ffed430
3fffff30: 3fff256c 00000001 40226496 40210265
3fffff40: 402262a5 3fff2794 3fffff80 3fff1dac
3fffff50: 3ffe0000 3fff256c 3ffef780 40226c94
3fffff60: 3fff2794 3fff1dac 3ffeaf26 402259f7
3fffff70: 3fff1dac 00000014 40225fa2 3fff2794
3fffff80: 3fff1dac 3fffdc80 3fff1e14 3fff0460
3fffff90: 4021d93b 3fff2794 00000000 4020767f
3fffffa0: 40000f49 3fffdab0 3fffdab0 40000f49
<<<stack<<<
@liquidfalcon
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Can you comment out MDNS, and see if it runs? There's a known bug with it causing crashes just like this, see issue #1926

@AlexM600
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Author

Thanks liquidfalcon!
With commented out MDNS it runs w/o exceptions.

@blastervla
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Hi! I wanted to ask you if there is another reason as to which the ESP could be behaving like this. You see, I have a black ESP8266-01 and it will reboot and print a stack trace just after showing this exact same exception. Nevertheless, I do not use MDNS in my program. Does anybody know what could be happening?

@liquidfalcon
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This sounds like a separate issue, @blastervla - Could you create a new issue, fill out the information, and post a decoded stack trace? That should help us figure it out

@wateras
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wateras commented Apr 1, 2017

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

load 0x40100000, len 2408, room 16
tail 8
chksum 0xe5
load 0x3ffe8000, len 776, room 0
tail 8
chksum 0x84
load 0x3ffe8310, len 632, room 0
tail 8
chksum 0xd8
csum 0xd8

2nd boot version : 1.6
SPI Speed : 40MHz
SPI Mode : QIO
SPI Flash Size & Map: 8Mbit(512KB+512KB)
jump to run user2 @ 81000

Fatal exception 0(IllegalInstructionCause):
epc1=0x40102687, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000, depc=0x00000000

@RAlexeev
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I have the same problem with my sketch. If I turn on debug mode, then "Fatal exception 0(IllegalInstructionCause)" occurs. I can comment out one of these lines "WiFi.persistent(false);", "wifiDisconnect(true);" or "MDNS.begin("my_esp_hostname");" and everything executes without exceptions. Also I can turn off debug mode, in this case exceptions will disappear.
This error occurs only with one specific Wi-Fi router Zyxel Keenetic LTE, if Acces Point is not open, but no with two another, which I've tried. SSID and psk don't matter. What is wrong with my sketch? I've tried to execute it on two different ESP8266.

#include <ESP8266WiFi.h>
#include <ESP8266mDNS.h>


void wifiDisconnect(bool wifioff) {
  switch (WiFi.getMode()) {
    case WIFI_STA:
      delay(100);
      WiFi.disconnect(wifioff);
      delay(100);
      break;
    case WIFI_AP:
      delay(100);
      WiFi.softAPdisconnect(wifioff);
      delay(100);
      break;
    case WIFI_AP_STA:
      delay(100);
      WiFi.disconnect(wifioff);
      delay(100);
      WiFi.softAPdisconnect(wifioff);
      delay(100);
      break;
  }
}


void setup(){
  Serial.begin(115200);
  delay(1000);

  WiFi.persistent(false);

  wifiDisconnect(true);

  WiFi.mode(WIFI_STA);
  WiFi.hostname("my_esp_hostname");
  WiFi.begin("MYWIFISSID", "MYWIFIPSK");
  for (uint8_t tries = 0; tries < 30; tries++) {
    if (WiFi.isConnected()) {
      break;
    }
    else {
      delay(500);
    }
  }

  MDNS.begin("my_esp_hostname");
}


void loop() { }

Serial monitor output in debug mode:

SDK:2.2.1(cfd48f3)/Core:2.4.1-102-g74819a76/lwIP:2.0.3(STABLE-2_0_3_RELEASE/glue:arduino-2.4.1-13-g163bb82)/BearSSL:94e9704
bcn 0
del if1
usl
add if1
dhcp server start:(ip:192.168.4.1,mask:255.255.255.0,gw:192.168.4.1)
bcn 100
bcn 0
del if1
usl
mode : null
wifi evt: 8
mode : sta(dc:4f:22:18:14:58)
add if0
wifi evt: 8
wifi evt: 2
scandone
state: 0 -> 2 (b0)
state: 2 -> 3 (0)
state: 3 -> 5 (10)
add 0
aid 2
cnt 

connected with MYWIFISSID, channel 6
dhcp client start...
wifi evt: 0
ip:192.168.1.33,mask:255.255.255.0,gw:192.168.1.1
wifi evt: 3
Fatal exception 0(IllegalInstructionCause):
epc1=0xa8c05814, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000, depc=0x00000000

Exception (0):
epc1=0xa8c05814 epc2=0x00000000 epc3=0x00000000 excvaddr=0x00000000 depc=0x00000000

ctx: cont 
sp: 3ffffbb0 end: 3fffffd0 offset: 01a0

>>>stack>>>
3ffffd50:  00000000 00000000 00000020 4010122e  
3ffffd60:  3ffe9410 4022436b 3ffef514 3fff03f4  
3ffffd70:  00000000 4021822f 3ffed7ec 401009e4  
3ffffd80:  3ffe8ffc 3ffffe60 3ffffe60 3ffef87d  
3ffffd90:  3ffef5b0 3fff0144 0000000a 3ffedf3c  
3ffffda0:  3ffe8ffc 3ffe8ffc 3ffefa67 4021a057  
3ffffdb0:  3ffefcda 0000002e 0000001f 40104f09  
3ffffdc0:  4000050c 0006688e 3ffee020 3ffef2f5  
3ffffdd0:  3ffef2c0 3ffef2c0 3ffefc94 4020bed2  
3ffffde0:  4020c26b 3ffefc94 3ffefcda 4020c274  
3ffffdf0:  00000008 3ffffe20 00000000 000000a5  
3ffffe00:  000000a5 3ffefb28 00000001 3ffefce8  
3ffffe10:  3ffefc94 3ffefab0 3ffef2c0 40211ded  
3ffffe20:  005e0001 4010fb00 00000012 4022d8ae  
3ffffe30:  00000018 3ffefab0 3ffefc94 40212874  
3ffffe40:  00000080 401022f4 3ffeed68 00000000  
3ffffe50:  3ffef2c4 00000001 00000000 00000002  
3ffffe60:  3ffef220 00000004 3ffefaac 40212ee4  
3ffffe70:  00000001 00000001 402391a0 3ffefaac  
3ffffe80:  00000000 3ffefc94 3ffefd00 402128b4  
3ffffe90:  3ffef2c0 3ffffec0 00000004 3ffefaac  
3ffffea0:  00000016 3ffef2c0 3ffefaac 40212045  
3ffffeb0:  3ffef2c0 3ffffec0 00000004 4020c2c8  
3ffffec0:  00000494 00000000 3ffef454 4020c304  
3ffffed0:  3ffefab0 3ffef2c0 3ffeed68 40212116  
3ffffee0:  3ffef50c 402052f8 0000001c 00000020  
3ffffef0:  3fffff5c 3ffef2c0 3ffefaac 402122ef  
3fffff00:  3fffff5c 3ffe9138 3ffef2c0 4021237b  
3fffff10:  4957594d 00000001 3fffff90 00000001  
3fffff20:  3ffeecd4 3ffeeca8 3ffeecd4 4020359a  
3fffff30:  00000000 3ffeeca8 3ffefaa4 401009e4  
3fffff40:  3ffeed68 000000e4 3fffff80 40205350  
3fffff50:  00000000 402052f8 3ffeed00 fb0000e0  
3fffff60:  00000000 3ffeeca8 3ffeecd4 3ffeee54  
3fffff70:  00000000 3ffeeca8 3ffeecd4 40204892  
3fffff80:  3ffefaac 40202f28 40203250 402036bc  
3fffff90:  00000000 00000000 000001f4 402030e4  
3fffffa0:  3ffe8950 00000017 3ffeeca8 40202771  
3fffffb0:  3fffdad0 00000000 3ffeee4c 402054a0  
3fffffc0:  feefeffe feefeffe 3ffe85dc 40100a45  
<<<stack<<<

 ets Jan  8 2013,rst cause:1, boot mode:(3,0)

load 0x4010f000, len 1384, room 16 
tail 8
chksum 0x2d
csum 0x2d
v74819a76
~ld

Exception decoding:

Exception 0: Illegal instruction
PC: 0xa8c05814
EXCVADDR: 0x00000000

Decoding stack results
0x401009e4: free at /opt/arduino-1.8.5/hardware/esp8266com/esp8266/cores/esp8266/umm_malloc/umm_malloc.c line 1755
0x4020bed2: new_linkoutput at glue-lwip/lwip-git.c line 259
0x4020c26b: ethernet_output at netif/ethernet.c line 305
0x4020c274: ethernet_output at netif/ethernet.c line 305
0x40211ded: etharp_output_LWIP2 at core/ipv4/etharp.c line 893
0x40212874: ip4_output_if_opt_src at core/ipv4/ip4.c line 962
0x40212ee4: mem_malloc at core/mem.c line 136
0x402128b4: ip4_output_if_opt at core/ipv4/ip4.c line 788
0x40212045: igmp_send at core/ipv4/igmp.c line 793
0x4020c2c8: do_memp_malloc_pool at core/memp.c line 301
0x4020c304: memp_malloc at core/memp.c line 404
0x40212116: igmp_lookup_group at core/ipv4/igmp.c line 258
0x402052f8: operator new(unsigned int) at /opt/arduino-1.8.5/hardware/esp8266com/esp8266/cores/esp8266/abi.cpp line 34
0x402122ef: igmp_joingroup_netif at core/ipv4/igmp.c line 694
0x4021237b: igmp_joingroup at core/ipv4/igmp.c line 464
0x4020359a: MDNSResponder::_listen() at /opt/arduino-1.8.5/hardware/esp8266com/esp8266/libraries/ESP8266mDNS/ESP8266mDNS.cpp line 198
0x401009e4: free at /opt/arduino-1.8.5/hardware/esp8266com/esp8266/cores/esp8266/umm_malloc/umm_malloc.c line 1755
0x40205350: operator delete(void*) at /opt/arduino-1.8.5/hardware/esp8266com/esp8266/cores/esp8266/abi.cpp line 54
0x402052f8: operator new(unsigned int) at /opt/arduino-1.8.5/hardware/esp8266com/esp8266/cores/esp8266/abi.cpp line 34
0x40204892: MDNSResponder::begin(char const*) at /opt/arduino-1.8.5/hardware/esp8266com/esp8266/libraries/ESP8266mDNS/ESP8266mDNS.cpp line 174
0x40202f28: ESP8266WiFiSTAClass::status() at /opt/arduino-1.8.5/hardware/esp8266com/esp8266/libraries/ESP8266WiFi/src/ESP8266WiFiSTA.cpp line 498
0x40203250: std::_Function_base::_Base_manager ::_M_manager(std::_Any_data &, const std::_Any_data &, std::_Manager_operation) at /opt/arduino-1.8.5/hardware/esp8266com/esp8266/tools/xtensa-lx106-elf/xtensa-lx106-elf/include/c++/4.8.2/functional line 1931
0x402036bc: std::_Function_handler ::_M_invoke(const std::_Any_data &, const WiFiEventStationModeDisconnected &) at /opt/arduino-1.8.5/hardware/esp8266com/esp8266/libraries/ESP8266mDNS/ESP8266mDNS.cpp line 171
0x402030e4: ESP8266WiFiSTAClass::isConnected() at /opt/arduino-1.8.5/hardware/esp8266com/esp8266/libraries/ESP8266WiFi/src/ESP8266WiFiSTA.cpp line 324
0x40202771: setup() at /home/roman/Arduino/sketch_mdns_fatal_exception/sketch_mdns_fatal_exception.ino line 48
0x402054a0: loop_wrapper() at /opt/arduino-1.8.5/hardware/esp8266com/esp8266/cores/esp8266/core_esp8266_main.cpp line 122

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5 participants
@wateras @blastervla @liquidfalcon @RAlexeev @AlexM600