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nkolban / esp32-snippets

Sample ESP32 snippets and code fragments
https://leanpub.com/kolban-ESP32
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ESP32 crashes (when used along with MQTT over ssl) #842

Closed mm108 closed 5 years ago

mm108 commented 5 years ago

I encountered an (strange?)error when running my Arduino Sketch on a ESP32 dev board. I have two different sketches for testing purposes.

  1. Uses MQTT (over SSL) library.
  2. Uses this ESP32 Bluetooth LE library.

Both these works perfectly well when used independently. There's a sketch that uses both these libraries and then the ESP32 crashes repeatedly! I have tried all possibilities and poked around with the code since couple of days but I can't seem to get a fix.

I am still pretty new to ESP32/Arduino etc so any pointers would greatly help. Here are some logs. I even used the ESP Exception library to copy paste the trace and it shows me additional information regarding the crash.

Connecting to Home-WiFi
[D][WiFiGeneric.cpp:345] _eventCallback(): Event: 2 - STA_START
[D][WiFiGeneric.cpp:345] _eventCallback(): Event: 0 - WIFI_READY
. [D][WiFiGeneric.cpp:345] _eventCallback(): Event: 4 - STA_CONNECTED
. [D][WiFiGeneric.cpp:345] _eventCallback(): Event: 7 - STA_GOT_IP
[D][WiFiGeneric.cpp:389] _eventCallback(): STA IP: 192.168.1.201, MASK: 255.255.255.0, GW: 192.168.1.188
.  ...connected!
mqttServerIP = xxx.xxx.xxx.xxx (IP masked)
MQTT connecting ...[I][ssl_client.cpp:45] start_ssl_client(): Free heap before TLS 116464
[I][ssl_client.cpp:47] start_ssl_client(): Starting socket
[I][ssl_client.cpp:75] start_ssl_client(): Seeding the random number generator
[I][ssl_client.cpp:84] start_ssl_client(): Setting up the SSL/TLS structure...
[I][ssl_client.cpp:97] start_ssl_client(): Loading CA cert
[I][ssl_client.cpp:153] start_ssl_client(): Performing the SSL/TLS handshake...
[I][ssl_client.cpp:173] start_ssl_client(): Verifying peer X.509 certificate...
[I][ssl_client.cpp:183] start_ssl_client(): Certificate verified.
[I][ssl_client.cpp:186] start_ssl_client(): Free heap after TLS 72128
connected
Guru Meditation Error: Core  0 panic'ed (StoreProhibited). Exception was unhandled.
Core 0 register dump:
PC      : 0x4000c46c  PS      : 0x00060730  A0      : 0x8012b7d6  A1      : 0x3fff6950  
A2      : 0x00000000  A3      : 0x00000000  A4      : 0x0000001c  A5      : 0x00000000  
A6      : 0x40204dbc  A7      : 0x00000001  A8      : 0x800eeb4c  A9      : 0x3fff6910  
A10     : 0x3fffffc0  A11     : 0x00000000  A12     : 0x00000001  A13     : 0x3fffff60  
A14     : 0x3fffc918  A15     : 0x00000084  SAR     : 0x00000008  EXCCAUSE: 0x0000001d  
EXCVADDR: 0x00000000  LBEG    : 0x4000c46c  LEND    : 0x4000c477  LCOUNT  : 0x00000000  

Backtrace: 0x4000c46c:0x3fff6950 0x4012b7d3:0x3fff6960 0x4012c0b5:0x3fff6980 0x40107eb5:0x3fff69a0 0x40107eef:0x3fff69c0

Rebooting...
ets Jun  8 2016 00:22:57

The result from the ESP Exception Decoder

PC: 0x4000c46c
EXCVADDR: 0x00000000

Decoding stack results
0x4012911f: bta_ar_init at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/ar/bta_ar.c line 72
0x40129a01: bta_sys_init at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/sys/bta_sys_main.c line 186
0x401057c5: btu_task_start_up at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/stack/btu/btu_task.c line 301
0x401057ff: btu_task_thread_handler at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/stack/btu/btu_task.c line 226
mm108 commented 5 years ago

I moved the BT initialization to bottom ( that is after MQTT connection is successful). So now the MQTT connects properly every time but the moment I try to initialize the Bluetooth Library the ESP32 crashes. Greatly appreciate any pointers. Spent a great many hours poking at everything I possibly could.

The following lines are the ones used for initializing

      Serial.println(F("Initialize Bluetooth ..."));

      BLEDevice::init("");
      pBLEScan = BLEDevice::getScan(); //create new scan
      pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks());
      pBLEScan->setActiveScan(true); //active scan uses more power, but get results faster
      pBLEScan->setInterval(100);
      pBLEScan->setWindow(99);  // less or equal setInterval value

The crash log

Initialize Bluetooth ...
Guru Meditation Error: Core  0 panic'ed (StoreProhibited). Exception was unhandled.
Core 0 register dump:
PC      : 0x4000c46c  PS      : 0x00060f30  A0      : 0x80129386  A1      : 0x3fff6d30  
A2      : 0x00000000  A3      : 0x00000000  A4      : 0x0000001c  A5      : 0x00000000  
A6      : 0x40202730  A7      : 0x00000001  A8      : 0x800ec6dd  A9      : 0x3fff6cf0  
A10     : 0x3ffffe9c  A11     : 0x00000000  A12     : 0x00000001  A13     : 0x3ffffe0c  
A14     : 0x3fffccfc  A15     : 0x00000084  SAR     : 0x00000008  EXCCAUSE: 0x0000001d  
EXCVADDR: 0x00000000  LBEG    : 0x4000c46c  LEND    : 0x4000c477  LCOUNT  : 0x00000000  

Backtrace: 0x4000c46c:0x3fff6d30 0x40129383:0x3fff6d40 0x40129c65:0x3fff6d60 0x40105a2d:0x3fff6d80 0x40105a67:0x3fff6da0

Rebooting...
ets Jun  8 2016 00:22:57

The result from ESP exception decoder

PC: 0x4000c46c
EXCVADDR: 0x00000000

Decoding stack results
0x40129383: bta_ar_init at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/ar/bta_ar.c line 72
0x40129c65: bta_sys_init at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/sys/bta_sys_main.c line 186
0x40105a2d: btu_task_start_up at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/stack/btu/btu_task.c line 301
0x40105a67: btu_task_thread_handler at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/stack/btu/btu_task.c line 226

initialising-bluetooth-causes-crash

mm108 commented 5 years ago

Ok this is related to the memory issues when using WiFi + BLE. I'll work my way around this. Thanks anyways.

tommy-mor commented 5 years ago

What do you mean related to memory issues? Having same problem. Did you work your way around this?

mmrvelj commented 4 years ago

I am experiencing the same issue.

Using MQTT without SSL works, but with SSL either fails SSL connection or crashes system (depends on the order of invocation).

KaranRajPradhan commented 4 years ago

@m-menon did you find a solution for this? I'm experiencing similar issues.

mm108 commented 4 years ago

It's been a long time since that project and so I don't exactly remember but I do recollect couple of things that I did back then - I moved all of the strings, certs etc to flash memory. I also remember having experimented with another mqtt library. If I can find my old source code, I'll elaborate further.

Also the BLE library/stack is somewhat heavy. You can look at the discussion here regarding that. Also if storage (size) is an issue, that can be easily tackled by altering the partition size.

If you can post a minimal program to reproduce the issue, I may be able to suggest some fixes.

chegewara commented 4 years ago

Most likely its problem with memory shortage. ble is using a lot of memory and SSL connection also need a lot memory to initial connection. Try o add memory logging before SSL connection starts.