ESP8266 crashes when used with low RAM/Heaps available. EXCEPTION (29) #56
Comments
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i was thinking if that space is reserved for the wifi stack and causes the ecxeption.
i wonder if it's possible to check the wifi stack size...? apart from that, i checked the addresses "3FFF3***" from the serial monitor and they seem to be well within range of the user RAM "dram1". can't be an out-of-range issue then.
source: Memory Map |
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UPDATE: when i run that everything looks normal. stack size: 4KB and free stack around 1000B-1400B. but if the free heap size gets lower than 4KB it would cause a crash. (i assume) a successfull sendMessage free heap size goes: which is quite close to 4KB.. and then it crashes in UniversalTelegramBot.cpp in function "UniversalTelegramBot::sendPostToTelegram" on exactly this line (est. 74): which means its quite certainly not a bug in UniversalTelegramBot, but rather somewhere else. i did find another thread with a very similar issue in the esp8266 core
and devyte's response:
if it's the same issue i see little i can do about it... someone another idea? |
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If it helps, I also got Exception(29) with the telegram bot, shown here: Aypac/Arduino-TR-064-SOAP-Library#2 (comment) |
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@gon0 making a https connection uses 18k of heap memory, I presume you are out of memory by the time out get down to the telegram line |
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@witnessmenow Yeah, seems like that. |
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UPDATE
it sounds as if there's a pull request with a better solution which will fix this issue in the future. in my case the ESP crashed when free heap went under ~4.5KB. but that's not always the same it seems.
which implies his heap went down to near zero... |
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FWIW, I updated my Arduino IDE to use the latest ESP8266 library following instructions here: https://github.com/esp8266/Arduino#using-git-version Now my sloppy mashup of the excellent Universal-Arduino-Telegram-Bot and a webserver based on this other excellent code: https://tttapa.github.io/ESP8266/Chap16%20-%20Data%20Logging.html Previously, it crashed repeatedly on |
Hello
I ran into a problem which i tried to investigate in the last week.
I'm using an ESP8266, wemos D1mini, and was able to reproduce the crash using the PhotoFromURL example.
This submitted issue might probably be a dublicate of #51 and #52 . Feel free to move and modify my post in any way you see fit.
Also note that this issue might be caused by ArduinoJSON or another library which Universal-Arduino-atelegram-Bot relies upon.
The crash occurs when sending messages. In my project the ESP crashes after sending 2-5 messages. Using the unmodified PhotoFromURL example it takes about 100-300 messages within ~3 minutes, which resulted in an Exception (29) crash.
I slightly modified the example and filled the RAM with a big global char array and wrote ESP.GetFreeHeap() to the serial output, which triggers the crash after sending ~10 messages.
The exception always occurs when the free heap size decreses beneath ~6500-5700.
The free heap size increases automatically when ~3min have passed. I assume the old buffers or something gets deleted when they are older than ~3min. The RAM gets filled the fastest when alternating between different messages, using my sketch: /get_test_photo and /status .
I enabled the _debug bool in UniversalTelegramBot.h
This is the modified sketch:
telegram_exceptionist.zip
Here 3 possible combinations and their outcome:
telegram_exeptionist.ino using WiFiClientSecure without filling RAM (no char array):
Sketch uses 296285 bytes (28%) of program storage space. Maximum is 1044464 bytes.
Global variables use 40484 bytes (49%) of dynamic memory, leaving 41436 bytes for local variables. Maximum is 81920 bytes.
Uploading 300432 bytes
free heaps:
at start 17300 B
crashes after 6160 B
(this was almost impossible since 100-300 messages have to be sent, but the RAM starts to free up again after ~3min.)
Serial output: [expand]
GET Update Messages .... connected to server{"ok":true,"result":[{"update_id":72978882,
"message":{"message_id":1980,"from":{"id":xxxxxxxx,"is_bot":false,"first_name":"Dejan","last_name":"Lauber","language_code":"en-US"},"chat":{"id":xxxxxxxx,"first_name":"Dejan","last_name":"Lauber","type":"private"},"date":1508349619,"text":"/status","entities":[{"offset":0,"length":7,"type":"bot_command"}]}}]}
incoming message length357
Creating DynamicJsonBuffer
got response
handleNewMessages
1
free heap: 6344 B
msg length: 298
sendMessage start: 8789721 ms
SEND Post Message
Exception (29):
epc1=0x4000e1b2 epc2=0x00000000 epc3=0x00000000 excvaddr=0x00000004 depc=0x00000000
ctx: cont
sp: 3fff0ee0 end: 3fff1500 offset: 01a0
ets Jan 8 2013,rst cause:2, boot mode:(1,6)
ets Jan 8 2013,rst cause:4, boot mode:(1,6)
wdt reset
telegram_exeptionist.ino using WiFiClientSecure and filling RAM:
Sketch uses 296389 bytes (28%) of program storage space. Maximum is 1044464 bytes.
Global variables use 50580 bytes (61%) of dynamic memory, leaving 31340 bytes for local variables. Maximum is 81920 bytes.
Uploading 300544 bytes
free heaps:
at start 7400 B
crashes after 6000 B
Serial output: [expand]
GET Update Messages .... connected to server{"ok":true,"result":[{"update_id":72978902,
"message":{"message_id":2016,"from":{"id":xxxxxxxx,"is_bot":false,"first_name":"Dejan","last_name":"Lauber","language_code":"en-US"},"chat":{"id":xxxxxxxx,"first_name":"Dejan","last_name":"Lauber","type":"private"},"date":1508350789,"text":"/status","entities":[{"offset":0,"length":7,"type":"bot_command"}]}}]}
incoming message length357
Creating DynamicJsonBuffer
got response
handleNewMessages
1
free heap: 6000 B
msg length: 298
sendMessage start: 29404
SEND Post Message
Exception (29):
epc1=0x4000e1b2 epc2=0x00000000 epc3=0x00000000 excvaddr=0x00000004 depc=0x00000000
ctx: cont
sp: 3fff3650 end: 3fff3c70 offset: 01a0
ets Jan 8 2013,rst cause:2, boot mode:(1,6)
ets Jan 8 2013,rst cause:4, boot mode:(1,6)
wdt reset
telegram_exeptionist.ino using HTTPSredirect and filling RAM:
I followed @witnessmenow 's suggestion in issue #52 to try HTTPSredirect instead of WiFiClientSecure. The same crash occurs.
Sketch uses 297021 bytes (28%) of program storage space. Maximum is 1044464 bytes.
Global variables use 51076 bytes (62%) of dynamic memory, leaving 30844 bytes for local variables. Maximum is 81920 bytes.
Uploading 301168 bytes
free heaps:
at start 6800 B
crashes after 5700 B
Serial output: [expand]
GET Update Messages .... connected to server{"ok":true,"result":[{"update_id":72978915,
"message":{"message_id":2047,"from":{"id":xxxxxxxx,"is_bot":false,"first_name":"Dejan","last_name":"Lauber","language_code":"en-US"},"chat":{"id":xxxxxxxx,"first_name":"Dejan","last_name":"Lauber","type":"private"},"date":1508501057,"text":"/status","entities":[{"offset":0,"length":7,"type":"bot_command"}]}}]}
incoming message length357
Creating DynamicJsonBuffer
got response
handleNewMessages
1
free heap: 5728 B
msg length: 298
sendMessage start: 72291
SEND Post Message
Exception (29):
epc1=0x4000e1b2 epc2=0x00000000 epc3=0x00000000 excvaddr=0x00000004 depc=0x00000000
ctx: cont
sp: 3fff3840 end: 3fff3e60 offset: 01a0
ets Jan 8 2013,rst cause:2, boot mode:(1,6)
ets Jan 8 2013,rst cause:4, boot mode:(1,6)
wdt reset
Notes
when the ESP crashes and dumps its stack, it waits 3s until the last line "wdt reset" happens.
i installed and tried the Arduino ESP8266/ESP32 Exception Stack Trace Decoder with an interesting first line. Apart from that i'm not sure what to look for..
The decoded output: [expand]
Exception 29: StoreProhibited: A store referenced a page mapped with an attribute that does not permit stores
Decoding 35 results
0x40223c0f: AES_cbc_decrypt at /Users/igrokhotkov/e/axtls/e1/crypto/aes.c line 337 (discriminator 2)
0x40223da8: trim at /Users/igrokhotkov/e/axtls/e1/crypto/bigint.c line 1203
0x4022405a: bi_terminate at /Users/igrokhotkov/e/axtls/e1/crypto/bigint.c line 119
0x40205f74: String::substring(unsigned int, unsigned int) const at /home/brian/.arduino15/packages/esp8266/hardware/esp8266/2.3.0/cores/esp8266/WString.cpp line 618
0x40224bb6: bi_set_mod at /Users/igrokhotkov/e/axtls/e1/crypto/bigint.c line 749
0x40224e11: precompute_slide_window at /Users/igrokhotkov/e/axtls/e1/crypto/bigint.c line 1327
: (inlined by) bi_mod_power at /Users/igrokhotkov/e/axtls/e1/crypto/bigint.c line 1372
0x40223c74: htonl at /Users/igrokhotkov/e/axtls/e1/ssl/os_port.h line 209 (discriminator 2)
: (inlined by) AES_cbc_decrypt at /Users/igrokhotkov/e/axtls/e1/crypto/aes.c line 347 (discriminator 2)
0x40225e9d: RSA_print at /Users/igrokhotkov/e/axtls/e1/crypto/rsa.c line 230
0x40221fa8: verify_digest at /Users/igrokhotkov/e/axtls/e1/ssl/tls1.c line 610
: (inlined by) basic_read at /Users/igrokhotkov/e/axtls/e1/ssl/tls1.c line 1336
0x402223a9: process_server_hello at /Users/igrokhotkov/e/axtls/e1/ssl/tls1_clnt.c line 293
: (inlined by) do_clnt_handshake at /Users/igrokhotkov/e/axtls/e1/ssl/tls1_clnt.c line 89
0x402030bb: ClientContext::_consume(unsigned int) at /home/brian/.arduino15/packages/esp8266/hardware/esp8266/2.3.0/libraries/ESP8266WiFi/src/WiFiClientSecure.cpp line 517
: (inlined by) ClientContext::read(char*, unsigned int) at /home/brian/.arduino15/packages/esp8266/hardware/esp8266/2.3.0/libraries/ESP8266WiFi/src/include/ClientContext.h line 175
0x40221da0: verify_digest at /Users/igrokhotkov/e/axtls/e1/ssl/tls1.c line 709
: (inlined by) basic_read at /Users/igrokhotkov/e/axtls/e1/ssl/tls1.c line 1336
0x40222148: send_client_hello at /Users/igrokhotkov/e/axtls/e1/ssl/tls1_clnt.c line 200
: (inlined by) do_client_connect at /Users/igrokhotkov/e/axtls/e1/ssl/tls1_clnt.c line 153
0x401004d8: malloc at /home/brian/.arduino15/packages/esp8266/hardware/esp8266/2.3.0/cores/esp8266/umm_malloc/umm_malloc.c line 1664
0x40221ef8: basic_read at /Users/igrokhotkov/e/axtls/e1/ssl/tls1.c line 1381
0x4020352d: WiFiClientSecure::_connectSSL(char const*) at /home/brian/.arduino15/packages/esp8266/hardware/esp8266/2.3.0/libraries/ESP8266WiFi/src/WiFiClientSecure.cpp line 517
0x40202a12: WiFiClient::connect(IPAddress, unsigned short) at /home/brian/.arduino15/packages/esp8266/hardware/esp8266/2.3.0/libraries/ESP8266WiFi/src/WiFiClient.cpp line 327
0x4020373d: WiFiClientSecure::connect(char const*, unsigned short) at /home/brian/.arduino15/packages/esp8266/hardware/esp8266/2.3.0/libraries/ESP8266WiFi/src/WiFiClientSecure.cpp line 265
0x40204ad9: ArduinoJson::Internals::JsonSerializer > >::serialize(ArduinoJson::JsonVariant const&, ArduinoJson::Internals::JsonWriter >&) at /home/brian/share/arduino/libraries/UniversalTelegramBot/src/UniversalTelegramBot.cpp line 283
0x40205aa3: UpdaterClass::UpdaterClass() at /home/brian/.arduino15/packages/esp8266/hardware/esp8266/2.3.0/cores/esp8266/Updater.cpp line 373
0x40205ad5: _GLOBAL__sub_D__ZN12UpdaterClassC2Ev at /home/brian/.arduino15/packages/esp8266/hardware/esp8266/2.3.0/cores/esp8266/Updater.cpp line 375
0x40205b98: String::reserve(unsigned int) at /home/brian/.arduino15/packages/esp8266/hardware/esp8266/2.3.0/cores/esp8266/WString.cpp line 589
0x40204d1c: UniversalTelegramBot::sendPostToTelegram(String, ArduinoJson::JsonObject&) at /home/brian/share/arduino/libraries/UniversalTelegramBot/src/UniversalTelegramBot.cpp line 283
0x40203cd4: ArduinoJson::JsonObject& ArduinoJson::JsonObject::createNestedObject_impl (char const*) at /home/brian/share/arduino/libraries/UniversalTelegramBot/src/UniversalTelegramBot.cpp line 283
0x40204ded: StringSumHelper at /home/brian/share/arduino/libraries/UniversalTelegramBot/src/UniversalTelegramBot.cpp line 283
: (inlined by) UniversalTelegramBot::sendPostMessage(ArduinoJson::JsonObject&) at /home/brian/share/arduino/libraries/UniversalTelegramBot/src/UniversalTelegramBot.cpp line 462
0x40205b26: String::init() at /home/brian/.arduino15/packages/esp8266/hardware/esp8266/2.3.0/cores/esp8266/WString.cpp line 589
: (inlined by) String::invalidate() at /home/brian/.arduino15/packages/esp8266/hardware/esp8266/2.3.0/cores/esp8266/WString.cpp line 135
0x40202164: handleNewMessages(int) at /home/brian/share/arduino/telegram_exceptionist/telegram_exceptionist.ino line 65
0x402059f8: Print::println(unsigned int, int) at /home/brian/.arduino15/packages/esp8266/hardware/esp8266/2.3.0/cores/esp8266/Print.cpp line 76
0x4020639c: ArduinoJson::Internals::JsonBufferAllocated::operator new(unsigned int, ArduinoJson::JsonBuffer*) at /home/brian/share/arduino/libraries/ArduinoJson/src/ArduinoJson/Data/JsonBufferAllocated.hpp line 19
0x402056e9: HardwareSerial::begin(unsigned long, SerialConfig, SerialMode, unsigned char) at /home/brian/.arduino15/packages/esp8266/hardware/esp8266/2.3.0/cores/esp8266/HardwareSerial.cpp line 193
0x40205714: _GLOBAL__sub_I__ZN14HardwareSerialC2Ei at /home/brian/.arduino15/packages/esp8266/hardware/esp8266/2.3.0/cores/esp8266/HardwareSerial.cpp line 197
0x40202389: loop at /home/brian/share/arduino/telegram_exceptionist/telegram_exceptionist.ino line 111
0x40205fc0: operator delete(void*) at /home/brian/.arduino15/packages/esp8266/hardware/esp8266/2.3.0/cores/esp8266/abi.cpp line 57
0x40100718: cont_norm at /home/brian/.arduino15/packages/esp8266/hardware/esp8266/2.3.0/cores/esp8266/cont.S line 109
Build options:
Board: "Wemos D1 R2 & mini"
CPU Frequency: "80MHz"
Flash Size: "4M (3M SPIFFS)"
Upload Speed: "921600"
Other things i've tried:
Different USB Power adapter. no effect.
I got the same crash on another ESP8266, with different power adapter and cable.
470uF Capacitor is in place on the 5V rail.
Added a 2200uF Capacitor to the 3.3V rail. no effect.
changed to 1M flash size. no effect.
changed clock to 160mhz. no effect.
If anyone has a clue on how to resolve this issue, or an idea on what to try next, let me know.
Best regards,
dejan lauber
PS: The ESP8266 and this telegram library blew my mind! Awesome work!
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