`lld_pdu_get_tx_flush_nb HCI packet count mismatch (10, 11)`

[Blue186]

    pClient  = BLEDevice::createClient();
    pClient->setClientCallbacks(new MyClientCallback());
    // 断链时间有点长
    if(!pClient->connect(*bleMacAddress,BLE_ADDR_TYPE_PUBLIC)){
      Serial.println("connect ERR");
      pClient->disconnect();
      return false;
    }

During the process of scanning from the ble client to the server and establishing a connection, if the Bluetooth signal is unstable, or if I power off the server, it will generate an lld_pdu_get_tx_flush-nb HCI packet count mismatch (10,11) error, and it will take a long time (about 30 seconds) to exit the pClient ->connect() function.

At this point, my customer service end is in a completely stuck state. Only when pClient ->connect() is completed can I exit from the stuck state. How can I quickly exit this invalid connection stuck state?

[per1234]

The ArduinoBLE library's BLEDevice class does not have a createClient function, so @Blue186 must be using a different library.

It is likely the "BLE" library from the "esp32" platform, which has an API matching the one we see used in the snippet provided by @Blue186:

https://github.com/espressif/arduino-esp32/blob/3.1.1/libraries/BLE/examples/Client/Client.ino#L45-L52