Kindly See the Docs, https://www.bluetooth.com/specifications/specs/core-specification-4-2/
In Pg. No: 1316/2772, you Can See "7.8.26 LE Long Term Key Request Negative Reply Command".
Kindly See the OFC Code, it is 0x001B.

* add esp32 support

* Update HCIVirtualTransport.cpp

* Update HCIVirtualTransport.cpp

add ESP32-C3 support

* Revert "Update HCIVirtualTransport.cpp"

This reverts commit 9af9bea.

* Update HCIVirtualTransport.cpp

* Update library.properties

* fix crash on restart

* Update ATT.cpp

spelling

* support more espressif chips

* Create compile-for-esp.yaml

don't know what I'm doing

* skip failing examples

* Update compile-for-esp.yaml

* Update compile-for-esp.yaml

* Update compile-for-esp.yaml

* Update compile-for-esp.yaml

* Update compile-for-esp.yaml

* Update compile-examples.yml

* Delete compile-for-esp.yaml

Only tested in Peripheral mode, with services and characteristics allocated:
* as global objects (arduino way)
* in function stack
* in heap

On mbed-enabled platforms, the memory check can be activated via

```

  ....
  mbed_stats_heap_t heap_stats;
  mbed_stats_heap_get(&heap_stats);
  Serial.print("Heap size: ");
  Serial.print(heap_stats.current_size);
  Serial.print(" / ");
  Serial.println(heap_stats.reserved_size);
  ....
```

Fix hard fault when str is NULL

Fix memory leak on end() -> begin() -> end()