ESP32 BLE retrieveCharacteristics(): >> getCharacteristics() exception

[gereblye79]

When I try to get the characteristics of my BLE device I always get the below error message. The source was working 3 days ago, but now it causes crash during the execution on the device. I could not do too much with the EspExceptionDecoder. Maybe my fault.

I get this message:

Stack smashing protect failure! abort() was called at PC 0x400dea3c on core 1

Backtrace: 0x40091f40:0x3ffceb00 0x40092171:0x3ffceb20 0x400dea3c:0x3ffceb40 0x400d5ab3:0x3ffceb60 0x400d5ada:0x3ffcec20 0x400d8fcb:0xe4893916

If I set the debug core level I see the following exception:

[D][BLEDevice.cpp:150] gattClientEventHandler(): gattClientEventHandler [esp_gatt_if: 4] ... Unknown [D][BLEClient.cpp:165] gattClientEventHandler(): gattClientEventHandler [esp_gatt_if: 4] ... Unknown [D][BLEClient.cpp:436] getServices(): << getServices [D][BLEDevice.cpp:150] gattClientEventHandler(): gattClientEventHandler [esp_gatt_if: 4] ... Unknown [D][BLEClient.cpp:396] getService(): << getService: found the service with uuid: 47e9ee00-47e9-11e4-8939-164230d1df67 [D][BLEClient.cpp:165] gattClientEventHandler(): gattClientEventHandler [esp_gatt_if: 4] ... Unknown [D][BLERemoteService.cpp:168] retrieveCharacteristics(): >> getCharacteristics() for service: 47e9ee00-47e9-11e4-8939-164230d1df67 Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled. Core 1 register dump: PC : 0x400812d0 PS : 0x00060c30 A0 : 0x800d7159 A1 : 0x3ffcec60
A2 : 0xe911e489 A3 : 0x00000000 A4 : 0x00000019 A5 : 0x00000048
A6 : 0x3ffcecd2 A7 : 0x3ffcecbc A8 : 0xe911e489 A9 : 0x3ffcec20
A10 : 0x00000000 A11 : 0x00000000 A12 : 0x00000001 A13 : 0x00000000
A14 : 0x3ffcecbc A15 : 0x00000000 SAR : 0x00000018 EXCCAUSE: 0x0000001c
EXCVADDR: 0xe911e489 LBEG : 0x4000c349 LEND : 0x4000c36b LCOUNT : 0xffffffff

Backtrace: 0x400812d0:0x3ffcec60 0x400d7156:0x3ffcec80 0x400d74fa:0x3ffced40 0x400db63b:0xe4893916

decoded error:

PC: 0x400812d0: pathToFileName at C:\Users\gereb\Documents\ArduinoData\packages\esp32\hardware\esp32\1.0.4\cores\esp32\esp32-hal-misc.c line 233 EXCVADDR: 0xe911e489

Decoding stack results 0x400812d0: pathToFileName at C:\Users\gereb\Documents\ArduinoData\packages\esp32\hardware\esp32\1.0.4\cores\esp32\esp32-hal-misc.c line 233 0x400d7156: BLERemoteService::retrieveCharacteristics() at C:\Users\gereb\Documents\Arduino\libraries\ESP32_BLE_Arduino\src\BLERemoteService.cpp line 199 0x400d74fa: BLERemoteService::getCharacteristic(BLEUUID) at C:\Users\gereb\Documents\Arduino\libraries\ESP32_BLE_Arduino\src\BLERemoteService.cpp line 149 0x400db63b: CometBlue::connect(std::__cxx11::basic_string , std::allocator >, unsigned int) at C:\Users\gereb\Documents\Arduino\libraries\Comet-Blue-Thermostat-master\CometBlue.cpp line 43

sketch part: int bluRetVal = device->connect("CometBlue", 5234);

library part (this is where the exception was thrown I think: ' uint8_t CometBlue::connect(std::string deviceName, uint32_t pin) { // check if connected if (_connected) { return 0; }

// connect to device
BLEDevice::init(deviceName);
BLEDevice::setPower(ESP_PWR_LVL_P4);
_client = BLEDevice::createClient();
if (!_client->connect(_deviceAddress)) {
    return 1;
}

// check service uuid
_remoteService = _client->getService(BLEUUID(SERVICE_UUID));
if (_remoteService == nullptr) {
    _client->disconnect();
    return 2;
}

// authenticate
BLERemoteCharacteristic* pRemotePin = _remoteService->getCharacteristic(BLEUUID(PIN_UUID));
if (pRemotePin == nullptr) {
    _client->disconnect();
    return 3;
}
uint8_t pinencoded[4] = {(uint8_t)(pin & 0xFF), (uint8_t)((pin >> 8) & 0xFF), (uint8_t)((pin >> 16) & 0xFF), (uint8_t)((pin >> 24) & 0xFF)};
pRemotePin->writeValue(pinencoded, sizeof(pinencoded), true);

// verify if successful
std::string value = _remoteService->getValue(BLEUUID(BAT_UUID));
if (value.length() == 0) {
    _client->disconnect();
    return 4;
}

_connected = true;
return 0;

} '

I am totally lost. Could you help me what is causing the problem?

[chegewara]

Stack smashing protect failure!

Too small task stack.

[gereblye79]

Thanks! How can I increase the task stack?

[stale[bot]]

[STALE_SET] This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 14 days if no further activity occurs. Thank you for your contributions.

[stale[bot]]

[STALE_DEL] This stale issue has been automatically closed. Thank you for your contributions.

[covert-]

To help others. I resolved this issue by using the ArduinoBLE lib instead of the ESP32_BLE one I was using.