BLE Client and WiFi Client simultaneously

[nb-ceffa]

Description:

Hi, I'm trying to use BLE Client and WiFi Client simultaneously but reading value from BLE device when WiFi is connected seems to be impossible. :( I have created simple demo attached below. Reading works fine when WiFi part is removed. Any idea what is wrong?
Thank you in advance!

Sketch:

#include <Arduino.h>
#include <WiFi.h>
#include "BLEDevice.h"

BLEClient* bleClient;
BLEAddress bleAddress = BLEAddress("<address>");

WiFiClient wifiClient;

void doBleStuff() {
  bleClient->connect(bleAddress);
  Serial.println("Reading...");
  std::string value = bleClient->getValue(BLEUUID("00001800-0000-1000-8000-00805f9b34fb"), BLEUUID("00002a00-0000-1000-8000-00805f9b34fb"));
  Serial.print("Value: ");
  Serial.println(value.c_str());
  bleClient->disconnect();
}

void setup() {
  Serial.begin(115200);
  BLEDevice::init("");
  bleClient = BLEDevice::createClient();
  
  wifiClient = WiFiClient();
  WiFi.begin("<SSID>", "<PASSWD>");

  delay(5000); 

  if (WiFi.waitForConnectResult() == WL_CONNECTED) { 
      Serial.print("WiFi connected. IP address: ");
      Serial.println(WiFi.localIP());
  }
}

void loop() {
  delay(10000); 

  doBleStuff();
}

Debug Messages:

[D][BLEDevice.cpp:54] createClient(): >> createClient
[D][BLEDevice.cpp:60] createClient(): << createClient
[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: 192.168.123.69, MASK: 255.255.255.0, GW: 192.168.123.1
WiFi connected. IP address: 192.168.123.69
[D][BLEClient.cpp:91] connect(): >> connect(<MAC_ADDRESS>)
[D][BLEClient.cpp:74] clearServices(): >> clearServices
[D][BLEClient.cpp:81] clearServices(): << clearServices
[D][BLEDevice.cpp:143] gattClientEventHandler(): gattClientEventHandler [esp_gatt_if: 4] ... ESP_GATTC_REG_EVT
[D][BLEUtils.cpp:1377] dumpGattClientEvent(): GATT Event: ESP_GATTC_REG_EVT
[D][BLEUtils.cpp:1550] dumpGattClientEvent(): [status: ESP_GATT_OK, app_id: 0x0]
[D][BLEDevice.cpp:143] gattClientEventHandler(): gattClientEventHandler [esp_gatt_if: 4] ... ESP_GATTC_DISCONNECT_EVT
[D][BLEUtils.cpp:1377] dumpGattClientEvent(): GATT Event: ESP_GATTC_DISCONNECT_EVT
[D][BLEUtils.cpp:1423] dumpGattClientEvent(): [reason: ESP_GATT_CONN_CONN_CANCEL, conn_id: 0, remote_bda: <MAC_ADDRESS>]
[D][BLEDevice.cpp:143] gattClientEventHandler(): gattClientEventHandler [esp_gatt_if: 4] ... ESP_GATTC_OPEN_EVT
[D][BLEUtils.cpp:1377] dumpGattClientEvent(): GATT Event: ESP_GATTC_OPEN_EVT
[D][BLEUtils.cpp:1503] dumpGattClientEvent(): [status: ESP_GATT_ERROR, conn_id: 0, remote_bda: <MAC_ADDRESS>, mtu: 0]
[D][BLEClient.cpp:123] connect(): << connect(), rc=0
Reading...
[D][BLEClient.cpp:386] getValue(): >> getValue: serviceUUID: 00001800-0000-1000-8000-00805f9b34fb, characteristicUUID: 00002a00-0000-1000-8000-00805f9b34fb
[D][BLEClient.cpp:322] getService(): >> getService: uuid: 00001800-0000-1000-8000-00805f9b34fb
[D][BLEClient.cpp:358] getServices(): >> getServices
[D][BLEClient.cpp:74] clearServices(): >> clearServices
[D][BLEClient.cpp:81] clearServices(): << clearServices

Build log:

Processing esp32dev__ (platform: espressif32; board: esp32dev; framework: arduino)
-----------------------------------------------------------------------------------------------------------------------------------------
Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/espressif32/esp32dev.html
PLATFORM: Espressif 32 > Espressif ESP32 Dev Module
HARDWARE: ESP32 240MHz 320KB RAM (4MB Flash)
DEBUG: CURRENT(esp-prog) EXTERNAL(esp-prog, iot-bus-jtag, jlink, minimodule, olimex-arm-usb-ocd, olimex-arm-usb-ocd-h, olimex-arm-usb-tiny-h, olimex-jtag-tiny, tumpa)
Library Dependency Finder -> http://bit.ly/configure-pio-ldf
LDF MODES: FINDER(chain) COMPATIBILITY(soft)
Collected 26 compatible libraries
Scanning dependencies...
Dependency Graph
|-- <WiFi> 1.0
|-- <ESP32 BLE Arduino> 0.4.16
Compiling .pioenvs\esp32dev__\src\main.cpp.o
Linking .pioenvs\esp32dev__\firmware.elf
Retrieving maximum program size .pioenvs\esp32dev__\firmware.elf
Checking size .pioenvs\esp32dev__\firmware.elf
Building .pioenvs\esp32dev__\firmware.bin
Memory Usage -> http://bit.ly/pio-memory-usage
DATA:    [==        ]  24.0% (used 78688 bytes from 327680 bytes)
PROGRAM: [=======   ]  74.4% (used 1462654 bytes from 1966080 bytes)
Configuring upload protocol...
AVAILABLE: esp-prog, esptool, iot-bus-jtag, jlink, minimodule, olimex-arm-usb-ocd, olimex-arm-usb-ocd-h, olimex-arm-usb-tiny-h, olimex-jtag-tiny, tumpa
CURRENT: upload_protocol = esptool

[chegewara]

Did you try to have 2 separate tasks?

[nb-ceffa]

Version with tasks:

Code:

#include <Arduino.h>
#include <WiFi.h>
#include "BLEDevice.h"

BLEClient* bleClient;
BLEAddress bleAddress = BLEAddress("<address>");

WiFiClient wifiClient;

void doBleStuff(void * parameter) {
  delay(6000);
  BLEDevice::init("");
  bleClient = BLEDevice::createClient();

  while(true) {
      Serial.println("Connecting (BLE)...");
      bleClient->connect(bleAddress);
      Serial.println("Reading...");
      std::string value = bleClient->getValue(BLEUUID("00001800-0000-1000-8000-00805f9b34fb"), BLEUUID("00002a00-0000-1000-8000-00805f9b34fb"));
      Serial.print("Value: ");
      Serial.println(value.c_str());
      bleClient->disconnect();

    Serial.println("Waiting (BLE)...");
    delay(10000);
  }

  delete bleClient;
  vTaskDelete(NULL);
}

void doWifiStuff(void * parameter) {
  wifiClient = WiFiClient();
  while(true) {  
    Serial.println("Connecting (WiFI)...");
    WiFi.begin("<SSID>", "<PASSWD>");

    delay(5000); 

    if (WiFi.waitForConnectResult() == WL_CONNECTED) { 
        Serial.print("WiFi connected. IP address: ");
        Serial.println(WiFi.localIP());
    }

    Serial.println("Waiting (WiFi)...");
    delay(500000);
    Serial.println("Disconnecting (WiFI)...");
    WiFi.disconnect();
  }

  vTaskDelete(NULL);
}

void setup() {
  Serial.begin(115200);
  xTaskCreate(doWifiStuff, "WifiTask", 10000, NULL, 1, NULL);
  xTaskCreate(doBleStuff, "BleTask", 10000, NULL, 1, NULL);
}

void loop() {
  delay(10000); 
}

Log:

Connecting (WiFI)...
[D][WiFiGeneric.cpp:345] _eventCallback(): Event: 0 - WIFI_READY
[D][WiFiGeneric.cpp:345] _eventCallback(): Event: 2 - STA_START
[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: 192.168.123.69, MASK: 255.255.255.0, GW: 192.168.123.1
WiFi connected. IP address: 192.168.123.69
Waiting (WiFi)...
[D][BLEDevice.cpp:54] createClient(): >> createClient
[D][BLEDevice.cpp:60] createClient(): << createClient
Connecting (BLE)...
[D][BLEClient.cpp:91] connect(): >> connect(<MAC_ADDRESS>)
[D][BLEClient.cpp:74] clearServices(): >> clearServices
[D][BLEClient.cpp:81] clearServices(): << clearServices
[D][BLEDevice.cpp:143] gattClientEventHandler(): gattClientEventHandler [esp_gatt_if: 4] ... ESP_GATTC_REG_EVT
[D][BLEUtils.cpp:1377] dumpGattClientEvent(): GATT Event: ESP_GATTC_REG_EVT
[D][BLEUtils.cpp:1550] dumpGattClientEvent(): [status: ESP_GATT_OK, app_id: 0x0]
[D][BLEDevice.cpp:143] gattClientEventHandler(): gattClientEventHandler [esp_gatt_if: 4] ... ESP_GATTC_DISCONNECT_EVT
[D][BLEUtils.cpp:1377] dumpGattClientEvent(): GATT Event: ESP_GATTC_DISCONNECT_EVT
[D][BLEUtils.cpp:1423] dumpGattClientEvent(): [reason: ESP_GATT_CONN_FAIL_ESTABLISH, conn_id: 0, remote_bda: <MAC_ADDRESS>]
[D][BLEDevice.cpp:143] gattClientEventHandler(): gattClientEventHandler [esp_gatt_if: 4] ... ESP_GATTC_OPEN_EVT
[D][BLEUtils.cpp:1377] dumpGattClientEvent(): GATT Event: ESP_GATTC_OPEN_EVT
[D][BLEUtils.cpp:1503] dumpGattClientEvent(): [status: ESP_GATT_ERROR, conn_id: 0, remote_bda: <MAC_ADDRESS>, mtu: 0]
[D][BLEClient.cpp:123] connect(): << connect(), rc=0
Reading...
[D][BLEClient.cpp:386] getValue(): >> getValue: serviceUUID: 00001800-0000-1000-8000-00805f9b34fb, characteristicUUID: 00002a00-0000-1000-8000-00805f9b34fb
[D][BLEClient.cpp:322] getService(): >> getService: uuid: 00001800-0000-1000-8000-00805f9b34fb
[D][BLEClient.cpp:358] getServices(): >> getServices
[D][BLEClient.cpp:74] clearServices(): >> clearServices
[D][BLEClient.cpp:81] clearServices(): << clearServices
Disconnecting (WiFI)...
Connecting (WiFI)...
[D][WiFiGeneric.cpp:345] _eventCallback(): Event: 5 - STA_DISCONNECTED
[W][WiFiGeneric.cpp:360] _eventCallback(): Reason: 8 - ASSOC_LEAVE
[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: 192.168.123.69, MASK: 255.255.255.0, GW: 192.168.123.1
WiFi connected. IP address: 192.168.123.69
Waiting (WiFi)...

For delay 5000 instead of 6000 it throw an exception:

0x40094ec8: invoke_abort at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/esp32/panic.c line 140
0x400950cb: abort at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/esp32/panic.c line 149
0x401a9ae7: __cxxabiv1::__terminate(void (*)()) at /builds/idf/crosstool-NG/.build/src/gcc-5.2.0/libstdc++-v3/libsupc++/eh_terminate.cc line 47
0x401a9b2e: std::terminate() at /builds/idf/crosstool-NG/.build/src/gcc-5.2.0/libstdc++-v3/libsupc++/eh_terminate.cc line 57
0x40197427: __cxxabiv1::__cxa_throw(void*, std::type_info*, void (*)(void*)) at /builds/idf/crosstool-NG/.build/src/gcc-5.2.0/libstdc++-v3/libsupc++/eh_throw.cc line 87

or:

Connecting (WiFI)...
[D][WiFiGeneric.cpp:345] _eventCallback(): Event: 0 - WIFI_READY
[D][WiFiGeneric.cpp:345] _eventCallback(): Event: 2 - STA_START
[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: 192.168.123.69, MASK: 255.255.255.0, GW: 192.168.123.1
WiFi connected. IP address: 192.168.123.69
Waiting (WiFi)...
[D][BLEDevice.cpp:54] createClient(): >> createClient
[D][BLEDevice.cpp:60] createClient(): << createClient
Connecting (BLE)...
[D][BLEClient.cpp:91] connect(): >> connect(<MAC_ADDRESS>)
[D][BLEClient.cpp:74] clearServices(): >> clearServices
[D][BLEClient.cpp:81] clearServices(): << clearServices
[D][BLEDevice.cpp:143] gattClientEventHandler(): gattClientEventHandler [esp_gatt_if: 4] ... ESP_GATTC_REG_EVT
[D][BLEUtils.cpp:1377] dumpGattClientEvent(): GATT Event: ESP_GATTC_REG_EVT
[D][BLEUtils.cpp:1550] dumpGattClientEvent(): [status: ESP_GATT_OK, app_id: 0x0]
Task watchdog got triggered. The following tasks did not reset the watchdog in time:
 - IDLE (CPU 0)
Tasks currently running:
CPU 0: wifi
CPU 1: IDLE
Task watchdog got triggered. The following tasks did not reset the watchdog in time:
 - IDLE (CPU 0)
Tasks currently running:
CPU 0: wifi
CPU 1: IDLE

and for delay 1000 instead of 6000 it reads data for the first run and the second run is blecked again:

........ 
Waiting (BLE)...
[D][BLEUtils.cpp:1377] dumpGattClientEvent(): GATT Event: ESP_GATTC_CLOSE_EVT
[D][BLEUtils.cpp:1392] dumpGattClientEvent(): [status: ESP_GATT_OK, reason:ESP_GATT_CONN_UNKNOWN, conn_id: 0]
[D][BLEDevice.cpp:143] gattClientEventHandler(): gattClientEventHandler [esp_gatt_if: 4] ... ESP_GATTC_DISCONNECT_EVT
[D][BLEUtils.cpp:1377] dumpGattClientEvent(): GATT Event: ESP_GATTC_DISCONNECT_EVT
[D][BLEUtils.cpp:1423] dumpGattClientEvent(): [reason: ESP_GATT_CONN_TERMINATE_LOCAL_HOST, conn_id: 0, remote_bda: <MAC_ADDRESS>]
[D][BLEDevice.cpp:143] gattClientEventHandler(): gattClientEventHandler [esp_gatt_if: 4] ... ESP_GATTC_UNREG_EVT
[D][BLEUtils.cpp:1377] dumpGattClientEvent(): GATT Event: ESP_GATTC_UNREG_EVT
Connecting (BLE)...
[D][BLEClient.cpp:91] connect(): >> connect(<MAC_ADDRESS>)
[D][BLEClient.cpp:74] clearServices(): >> clearServices
[D][BLEClient.cpp:81] clearServices(): << clearServices
[D][BLEDevice.cpp:143] gattClientEventHandler(): gattClientEventHandler [esp_gatt_if: 4] ... ESP_GATTC_REG_EVT
[D][BLEUtils.cpp:1377] dumpGattClientEvent(): GATT Event: ESP_GATTC_REG_EVT
[D][BLEUtils.cpp:1550] dumpGattClientEvent(): [status: ESP_GATT_OK, app_id: 0x0]
[D][BLEDevice.cpp:143] gattClientEventHandler(): gattClientEventHandler [esp_gatt_if: 4] ... ESP_GATTC_DISCONNECT_EVT
[D][BLEUtils.cpp:1377] dumpGattClientEvent(): GATT Event: ESP_GATTC_DISCONNECT_EVT
[D][BLEUtils.cpp:1423] dumpGattClientEvent(): [reason: ESP_GATT_CONN_FAIL_ESTABLISH, conn_id: 0, remote_bda: <MAC_ADDRESS>]
[D][BLEDevice.cpp:143] gattClientEventHandler(): gattClientEventHandler [esp_gatt_if: 4] ... ESP_GATTC_OPEN_EVT
[D][BLEUtils.cpp:1377] dumpGattClientEvent(): GATT Event: ESP_GATTC_OPEN_EVT
[D][BLEUtils.cpp:1503] dumpGattClientEvent(): [status: ESP_GATT_ERROR, conn_id: 0, remote_bda: <MAC_ADDRESS>, mtu: 0]
[D][BLEClient.cpp:123] connect(): << connect(), rc=0
Reading...
[D][BLEClient.cpp:386] getValue(): >> getValue: serviceUUID: 00001800-0000-1000-8000-00805f9b34fb, characteristicUUID: 00002a00-0000-1000-8000-00805f9b34fb
[D][BLEClient.cpp:322] getService(): >> getService: uuid: 00001800-0000-1000-8000-00805f9b34fb
[D][BLEClient.cpp:358] getServices(): >> getServices
[D][BLEClient.cpp:74] clearServices(): >> clearServices
[D][BLEClient.cpp:81] clearServices(): << clearServices
Disconnecting (WiFI)...
Connecting (WiFI)...
[D][WiFiGeneric.cpp:345] _eventCallback(): Event: 5 - STA_DISCONNECTED
[W][WiFiGeneric.cpp:360] _eventCallback(): Reason: 8 - ASSOC_LEAVE
[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: 192.168.123.69, MASK: 255.255.255.0, GW: 192.168.123.1
WiFi connected. IP address: 192.168.123.69
Waiting (WiFi)...

[chegewara]

One more thing, if its possible try first obtain IP address and then start with ble. This is how i am doing my stuff.

[nb-ceffa]

That's what i did in the the example with 6sec delay. Isn't it?

[D][WiFiGeneric.cpp:389] _eventCallback(): STA IP: 192.168.123.69, MASK: 255.255.255.0, GW: 192.168.123.1
WiFi connected. IP address: 192.168.123.69
Waiting (WiFi)...
[D][BLEDevice.cpp:54] createClient(): >> createClient
[D][BLEDevice.cpp:60] createClient(): << createClient
Connecting (BLE)...

but it is still stopped on:

Reading...
[D][BLEClient.cpp:386] getValue(): >> getValue: serviceUUID: 00001800-0000-1000-8000-00805f9b34fb, characteristicUUID: 00002a00-0000-1000-8000-00805f9b34fb
[D][BLEClient.cpp:322] getService(): >> getService: uuid: 00001800-0000-1000-8000-00805f9b34fb
[D][BLEClient.cpp:358] getServices(): >> getServices
[D][BLEClient.cpp:74] clearServices(): >> clearServices
[D][BLEClient.cpp:81] clearServices(): << clearServices

[chegewara]

@nb-ceffa Please try this:
https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/BLEClient.cpp#L108

Sorry for bad support from my side, i am very occupied lately.

[nb-ceffa]

@chegewara I'm glad for any support from your side ;)

the behavior is still the same :( and it sometimes throws an exception:

0x40094ec8: invoke_abort at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/esp32/panic.c line 140
0x400950cb: abort at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/esp32/panic.c line 149
0x401a9a67: __cxxabiv1::__terminate(void (*)()) at /builds/idf/crosstool-NG/.build/src/gcc-5.2.0/libstdc++-v3/libsupc++/eh_terminate.cc line 47
0x401a9aae: std::terminate() at /builds/idf/crosstool-NG/.build/src/gcc-5.2.0/libstdc++-v3/libsupc++/eh_terminate.cc line 57
0x401973a7: __cxxabiv1::__cxa_throw(void*, std::type_info*, void (*)(void*)) at /builds/idf/crosstool-NG/.build/src/gcc-5.2.0/libstdc++-v3/libsupc++/eh_throw.cc line 87

[chegewara]

Could you try with different service UUID, it should work for all services, but i think its something wrong in here.

[nb-ceffa]

still the same :(

Should I use https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/BLEClient.cpp instead of https://github.com/nkolban/ESP32_BLE_Arduino/blob/11a0aa645326aed0cb681e86060fe28d4623bc68/src/BLEClient.cpp ?

[chegewara]

This should be version with some improvements, but is not prepared PR yet:
https://gist.github.com/chegewara/d3ed0e3365407f6d3abcffc486b2c462

[nb-ceffa]

Hi @chegewara sorry for a long pause. I have updated to the newest lib (platformio "Espressif 32" 1.7.0):
Dependency Graph
|-- 1.0
|-- 1.0.1

and current stacktrace is:

0x40091c18: invoke_abort at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/esp32/panic.c line 155
0x40091e49: abort at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/esp32/panic.c line 170
0x4014d50f: __assert_func at ../../../.././newlib/libc/stdlib/assert.c line 63
0x400973fd: multi_heap_free at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/heap/multi_heap_poisoning.c line 214
0x40084582: heap_caps_free at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/heap/heap_caps.c line 269
0x4008b0f1: _free_r at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/newlib/syscalls.c line 42
0x400e5371: btc_gattc_cb_handler at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/btc/profile/std/gatt/btc_gattc.c line 31
0x400e1456: btc_task at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/btc/core/btc_task.c line 110
0x400940a9: vPortTaskWrapper at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/freertos/port.c line 143

last few lines of log:

[D][BLERemoteService.cpp:199] retrieveCharacteristics(): Found a characteristic: Handle: 24, UUID: 00002a28-0000-1000-8000-00805f9b34fb
[D][BLERemoteCharacteristic.cpp:43] BLERemoteCharacteristic(): >> BLERemoteCharacteristic: handle: 24 0x24, uuid: 00002a28-0000-1000-8000-00805f9b34fb
[D][BLERemoteCharacteristic.cpp:256] retrieveDescriptors(): >> retrieveDescriptors() for characteristic: 00002a28-0000-1000-8000-00805f9b34fb
[E][BLERemoteCharacteristic.cpp:280] retrieveDescriptors(): esp_ble_gattc_get_all_descr: Unknown
[D][BLERemoteCharacteristic.cpp:300] retrieveDescriptors(): << retrieveDescriptors(): Found 0 descriptors.
[D][BLERemoteCharacteristic.cpp:51] BLERemoteCharacteristic(): << BLERemoteCharacteristic
[D][BLERemoteService.cpp:215] retrieveCharacteristics(): << getCharacteristics()
[D][BLERemoteCharacteristic.cpp:404] readValue(): >> readValue(): uuid: 00002a24-0000-1000-8000-00805f9b34fb, handle: 20 0x14
[D][FreeRTOS.cpp:165] take(): Semaphore taking: name: ReadCharEvt (0x3fff2a30), owner: <N/A> for readValue
[D][FreeRTOS.cpp:174] take(): Semaphore taken:  name: ReadCharEvt (0x3fff2a30), owner: readValue
[V][FreeRTOS.cpp:70] wait(): >> wait: Semaphore waiting: name: ReadCharEvt (0x3fff2a30), owner: readValue for readValue
[V][BLEUtils.cpp:952] gattClientEventTypeToString(): Unknown GATT Client event type: 3
[D][BLEDevice.cpp:154] gattClientEventHandler(): gattClientEventHandler [esp_gatt_if: 4] ... Unknown
[V][BLEUtils.cpp:952] gattClientEventTypeToString(): Unknown GATT Client event type: 3
[V][BLEUtils.cpp:1284] dumpGattClientEvent(): GATT Event: Unknown
[V][BLEUtils.cpp:952] gattClientEventTypeToString(): Unknown GATT Client event type: 3
[D][BLEClient.cpp:165] gattClientEventHandler(): gattClientEventHandler [esp_gatt_if: 4] ... Unknown
CORRUPT HEAP: Bad head at 0x3fff4e3c. Expected 0xabba1234 got 0x3fff5b90
assertion "head != NULL" failed: file "/Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/heap/multi_heap_poisoning.c", line 214, function: multi_heap_free
abort() was called at PC 0x4014d50f on core 0

[nb-ceffa]

Second crash looks like this:

Stacktrace:

0x40091c18: invoke_abort at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/esp32/panic.c line 155
0x40091e49: abort at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/esp32/panic.c line 170
0x4014d50f: __assert_func at ../../../.././newlib/libc/stdlib/assert.c line 63
0x4008457b: heap_caps_free at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/heap/heap_caps.c line 268
0x4008b0f1: _free_r at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/newlib/syscalls.c line 42
0x400e5371: btc_gattc_cb_handler at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/btc/profile/std/gatt/btc_gattc.c line 31
0x400e1456: btc_task at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/btc/core/btc_task.c line 110
0x400940a9: vPortTaskWrapper at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/freertos/port.c line 143

last few lines of log:

[D][BLERemoteService.cpp:199] retrieveCharacteristics(): Found a characteristic: Handle: 24, UUID: 00002a28-0000-1000-8000-00805f9b34fb
[D][BLERemoteCharacteristic.cpp:43] BLERemoteCharacteristic(): >> BLERemoteCharacteristic: handle: 24 0x24, uuid: 00002a28-0000-1000-8000-00805f9b34fb
[D][BLERemoteCharacteristic.cpp:256] retrieveDescriptors(): >> retrieveDescriptors() for characteristic: 00002a28-0000-1000-8000-00805f9b34fb
[E][BLERemoteCharacteristic.cpp:280] retrieveDescriptors(): esp_ble_gattc_get_all_descr: Unknown
[D][BLERemoteCharacteristic.cpp:300] retrieveDescriptors(): << retrieveDescriptors(): Found 0 descriptors.
[D][BLERemoteCharacteristic.cpp:51] BLERemoteCharacteristic(): << BLERemoteCharacteristic
[D][BLERemoteService.cpp:215] retrieveCharacteristics(): << getCharacteristics()
[D][BLERemoteCharacteristic.cpp:404] readValue(): >> readValue(): uuid: 00002a24-0000-1000-8000-00805f9b34fb, handle: 20 0x14
[D][FreeRTOS.cpp:165] take(): Semaphore taking: name: ReadCharEvt (0x3fff3970), owner: <N/A> for readValue
[D][FreeRTOS.cpp:174] take(): Semaphore taken:  name: ReadCharEvt (0x3fff3970), owner: readValue
[V][FreeRTOS.cpp:70] wait(): >> wait: Semaphore waiting: name: ReadCharEvt (0x3fff3970), owner: readValue for readValue
[V][BLEUtils.cpp:952] gattClientEventTypeToString(): Unknown GATT Client event type: 3
[D][BLEDevice.cpp:154] gattClientEventHandler(): gattClientEventHandler [esp_gatt_if: 4] ... Unknown
[V][BLEUtils.cpp:952] gattClientEventTypeToString(): Unknown GATT Client event type: 3
[V][BLEUtils.cpp:1284] dumpGattClientEvent(): GATT Event: Unknown
[V][BLEUtils.cpp:952] gattClientEventTypeToString(): Unknown GATT Client event type: 3
[D][BLEClient.cpp:165] gattClientEventHandler(): gattClientEventHandler [esp_gatt_if: 4] ... Unknown
assertion "heap != NULL && "free() target pointer is outside heap areas"" failed: file "/Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/heap/heap_caps.c", line 268, function: heap_caps_free
abort() was called at PC 0x4014d50f on core 0

any update on dis issue? facing the same...

[elettro1]

this error seems to be generated by BLERemoteCharacteristic::readValue()

try this my fix:
#2800

[kenken64]

after applying #2800 I am facing new issue

14:16:35.444 -> Guru Meditation Error: Core 0 panic'ed (Unhandled debug exception) 14:16:35.444 -> Debug exception reason: Stack canary watchpoint triggered (btuT) 14:16:35.479 -> Core 0 register dump: 14:16:35.479 -> PC : 0x4000c472 PS : 0x00060536 A0 : 0x8011bede A1 : 0x3ffe11b0 14:16:35.479 -> A2 : 0x3ffe11c4 A3 : 0x00000000 A4 : 0x00000268 A5 : 0x3ffe13f4 14:16:35.479 -> A6 : 0x3ffee8bd A7 : 0x00000026 A8 : 0x8013b2fa A9 : 0x3ffe1c40 14:16:35.479 -> A10 : 0x3ffed930 A11 : 0x3ffef184 A12 : 0x3ffe1eda A13 : 0x00000000 14:16:35.514 -> A14 : 0x00000004 A15 : 0x00000000 SAR : 0x00000018 EXCCAUSE: 0x00000001 14:16:35.514 -> EXCVADDR: 0x00000000 LBEG : 0x4000c46c LEND : 0x4000c477 LCOUNT : 0x00000002 14:16:35.514 -> 14:16:35.514 -> Backtrace: 0x4000c472:0x3ffe11b0 0x4011bedb:0x3ffe11c0 0x4013b26d:0x3ffe1450 0x4011b7aa:0x3ffe16e0 0x4013a0c5:0x3ffe1700 0x4013b2f7:0x3ffe1990 0x4011b7aa:0x3ffe1c20 0x4013a0c5:0x3ffe1c40 0x4013b2f7:0x3ffe1ed0 0x4011b7aa:0x3ffe2160 0x4013a0c5:0x3ffe2180 0x4013ae9a:0x3ffe2410 0x4011b7aa:0x3ffe2430 0x4013b10e:0x3ffe2450 0x4011b7aa:0x3ffe2470 0x4013adcd:0x3ffe2490 0x4013ade9:0x3ffe24b0 0x4011b7aa:0x3ffe24d0 0x4011b8e9:0x3ffe24f0 0x4011e90a:0x3ffe2510 0x400f9466:0x3ffe2530 0x4008e189:0x3ffe2560 14:16:35.548 -> 14:16:35.548 -> Rebooting... 14:16:35.548 -> ets Jun 8 2016 00:22:57 14:16:35.548 -> 14:16:35.548 -> rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT) 14:16:35.582 -> configsip: 0, SPIWP:0xee 14:16:35.582 -> clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00 14:16:35.582 -> mode:DIO, clock div:1 14:16:35.582 -> load:0x3fff0018,len:4 14:16:35.582 -> load:0x3fff001c,len:1100 14:16:35.582 -> load:0x40078000,len:9232 14:16:35.582 -> load:0x40080400,len:6400 14:16:35.582 -> entry 0x400806a8

0x4011bedb: bta_gattc_enqueue at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_utils.c line 460 0x4013b26d: bta_gattc_write at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_act.c line 1143 0x4011b7aa: bta_gattc_sm_execute at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_main.c line 288 0x4013a0c5: bta_gattc_pop_command_to_send at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_act.c line 1515 0x4013b2f7: bta_gattc_write at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_act.c line 1166 0x4011b7aa: bta_gattc_sm_execute at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_main.c line 288 0x4013a0c5: bta_gattc_pop_command_to_send at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_act.c line 1515 0x4013b2f7: bta_gattc_write at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_act.c line 1166 0x4011b7aa: bta_gattc_sm_execute at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_main.c line 288 0x4013a0c5: bta_gattc_pop_command_to_send at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_act.c line 1515 0x4013ae9a: bta_gattc_cfg_mtu at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_act.c line 934 0x4011b7aa: bta_gattc_sm_execute at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_main.c line 288 0x4013b10e: bta_gattc_disc_cmpl at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_act.c line 1047 0x4011b7aa: bta_gattc_sm_execute at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_main.c line 288 0x4013adcd: bta_gattc_reset_discover_st at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_act.c line 839 0x4013ade9: bta_gattc_disc_close at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_act.c line 858 0x4011b7aa: bta_gattc_sm_execute at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_main.c line 288 0x4011b8e9: bta_gattc_hdl_event at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_main.c line 397 0x4011e90a: bta_sys_event at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/sys/bta_sys_main.c line 496 0x400f9466: btu_task_thread_handler at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/stack/btu/btu_task.c line 233 0x4008e189: vPortTaskWrapper at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/freertos/port.c line 143

[kenken64]

Paste your stack trace here12:24:51.387 -> Guru Meditation Error: Core  0 panic'ed (Unhandled debug exception)
12:24:51.387 -> Debug exception reason: Stack canary watchpoint triggered (btuT) 
12:24:51.387 -> Core 0 register dump:
12:24:51.387 -> PC      : 0x4000c472  PS      : 0x00060336  A0      : 0x8011bef6  A1      : 0x3ffe1410  
12:24:51.422 -> A2      : 0x3ffe1424  A3      : 0x00000000  A4      : 0x00000268  A5      : 0x3ffe1654  
12:24:51.422 -> A6      : 0x3ffe4369  A7      : 0x00000026  A8      : 0x8013b2f6  A9      : 0x3ffe1ea0  
12:24:51.422 -> A10     : 0x3ffedbb8  A11     : 0x3ffde060  A12     : 0x3ffe213a  A13     : 0x00000000  
12:24:51.422 -> A14     : 0x00000004  A15     : 0x00000000  SAR     : 0x00000018  EXCCAUSE: 0x00000001  
12:24:51.422 -> EXCVADDR: 0x00000000  LBEG    : 0x4000c46c  LEND    : 0x4000c477  LCOUNT  : 0x00000002  
12:24:51.457 -> 
12:24:51.457 -> Backtrace: 0x4000c472:0x3ffe1410 0x4011bef3:0x3ffe1420 0x4013b269:0x3ffe16b0 0x4011b7c2:0x3ffe1940 0x4013a0c1:0x3ffe1960 0x4013b2f3:0x3ffe1bf0 0x4011b7c2:0x3ffe1e80 0x4013a0c1:0x3ffe1ea0 0x4013b2f3:0x3ffe2130 0x4011b7c2:0x3ffe23c0 0x4013a0c1:0x3ffe23e0 0x4013ae96:0x3ffe2670 0x4011b7c2:0x3ffe2690 0x4013b10a:0x3ffe26b0 0x4011b7c2:0x3ffe26d0 0x4013adc9:0x3ffe26f0 0x4013ade5:0x3ffe2710 0x4011b7c2:0x3ffe2730 0x4011b901:0x3ffe2750 0x4011e922:0x3ffe2770 0x400f94ba:0x3ffe2790 0x4008e461:0x3ffe27c0
12:24:51.492 -> 
12:24:51.492 -> Rebooting...
12:24:51.492 -> ets Jun  8 2016 00:22:57
12:24:51.492 -> 
12:24:51.492 -> rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
12:24:51.492 -> configsip: 0, SPIWP:0xee
12:24:51.492 -> clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
12:24:51.492 -> mode:DIO, clock div:1
12:24:51.492 -> load:0x3fff0018,len:4
12:24:51.526 -> load:0x3fff001c,len:1100
12:24:51.526 -> load:0x40078000,len:9232
12:24:51.526 -> load:0x40080400,len:6400
12:24:51.526 -> entry 0x400806a8

PC: 0x4000c472
EXCVADDR: 0x00000000

Decoding stack results
0x4011bef3: bta_gattc_enqueue at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_utils.c line 461
0x4013b269: bta_gattc_write at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_act.c line 1146
0x4011b7c2: bta_gattc_sm_execute at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_main.c line 288
0x4013a0c1: bta_gattc_pop_command_to_send at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_act.c line 1519
0x4013b2f3: bta_gattc_write at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_act.c line 1170
0x4011b7c2: bta_gattc_sm_execute at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_main.c line 288
0x4013a0c1: bta_gattc_pop_command_to_send at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_act.c line 1519
0x4013b2f3: bta_gattc_write at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_act.c line 1170
0x4011b7c2: bta_gattc_sm_execute at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_main.c line 288
0x4013a0c1: bta_gattc_pop_command_to_send at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_act.c line 1519
0x4013ae96: bta_gattc_cfg_mtu at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_act.c line 936
0x4011b7c2: bta_gattc_sm_execute at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_main.c line 288
0x4013b10a: bta_gattc_disc_cmpl at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_act.c line 1049
0x4011b7c2: bta_gattc_sm_execute at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_main.c line 288
0x4013adc9: bta_gattc_reset_discover_st at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_act.c line 841
0x4013ade5: bta_gattc_disc_close at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_act.c line 860
0x4011b7c2: bta_gattc_sm_execute at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_main.c line 288
0x4011b901: bta_gattc_hdl_event at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/gatt/bta_gattc_main.c line 397
0x4011e922: bta_sys_event at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/bta/sys/bta_sys_main.c line 496
0x400f94ba: btu_task_thread_handler at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/bt/bluedroid/stack/btu/btu_task.c line 233
0x4008e461: vPortTaskWrapper at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/freertos/port.c line 143