Help with Bluetooth integration failed importing component

Installation
,
1

I have created a post in Github as I am a bit desperate to fix it. (Detected blocking call to import_module with args ('homeassistant.components.bluetooth',) · Issue #138016 · home-assistant/core · GitHub). Sorry for duplicating.

I just updated from core-2024.12.5 to core-2025.2.1 and bluetooth component is failing. As bluetooth component is failing, ESPHome is also failing.

Home Assistant OS on RPi4.

I haven’t used bluetooth integration in my setup and don’t plan to use it for now.
I would appreciate all the help I can get as my heating system is controlled through ESPHome. Thanks!

EDIT: Have tried powering it off or on with bluetoothctl power on/off and no changes. Also tried adding or removing bluetooth: to configuration.yaml. Just trying stuff…

[core-ssh ~]$ bluetoothctl power off
Unable to open mgmt_socket
[CHG] Controller DC:A6:32:91:9A:04 PowerState: on-disabling
AdvertisementMonitor path registered
Changing power off succeeded
[CHG] Controller DC:A6:32:91:9A:04 PowerState: off
[CHG] Controller DC:A6:32:91:9A:04 Powered: no
[CHG] Controller DC:A6:32:91:9A:04 Discovering: no
[CHG] Controller DC:A6:32:91:9A:04 Class: 0x00000000 (0)
[core-ssh ~]$ bluetoothctl power on
Unable to open mgmt_socket
[CHG] Controller DC:A6:32:91:9A:04 PowerState: off-enabling
AdvertisementMonitor path registered

2025-02-09 11:43:03.683 ERROR (ImportExecutor_0) [homeassistant.loader] Unexpected exception importing component homeassistant.components.bluetooth
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1075, in _get_component
    ComponentProtocol, importlib.import_module(self.pkg_path)
                       ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/util/loop.py", line 201, in protected_loop_func
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.13/importlib/__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 1026, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/usr/src/homeassistant/homeassistant/components/bluetooth/__init__.py", line 10, in <module>
    from bleak_retry_connector import BleakSlotManager
  File "/usr/local/lib/python3.13/site-packages/bleak_retry_connector/__init__.py", line 11, in <module>
    from bleak import BleakClient, BleakScanner
  File "/usr/local/lib/python3.13/site-packages/bleak/__init__.py", line 50, in <module>
    from .backends.client import BaseBleakClient, get_platform_client_backend_type
  File "/usr/local/lib/python3.13/site-packages/bleak/backends/client.py", line 22, in <module>
    from ..exc import BleakError
SyntaxError: source code string cannot contain null bytes
2025-02-09 11:43:03.705 WARNING (MainThread) [homeassistant.util.loop] Detected blocking call to import_module with args ('homeassistant.components.bluetooth',) in /usr/src/homeassistant/homeassistant/loader.py, line 1075: ComponentProtocol, importlib.import_module(self.pkg_path) inside the event loop; This is causing stability issues. Please create a bug report at https://github.com/home-assistant/core/issues?q=is%3Aopen+is%3Aissue
For developers, please see https://developers.home-assistant.io/docs/asyncio_blocking_operations/#import_module
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/usr/src/homeassistant/homeassistant/__main__.py", line 227, in <module>
    sys.exit(main())
  File "/usr/src/homeassistant/homeassistant/__main__.py", line 213, in main
    exit_code = runner.run(runtime_conf)
  File "/usr/src/homeassistant/homeassistant/runner.py", line 154, in run
    return loop.run_until_complete(setup_and_run_hass(runtime_config))
  File "/usr/local/lib/python3.13/asyncio/base_events.py", line 707, in run_until_complete
    self.run_forever()
  File "/usr/local/lib/python3.13/asyncio/base_events.py", line 678, in run_forever
    self._run_once()
  File "/usr/local/lib/python3.13/asyncio/base_events.py", line 2033, in _run_once
    handle._run()
  File "/usr/local/lib/python3.13/asyncio/events.py", line 89, in _run
    self._context.run(self._callback, *self._args)
  File "/usr/src/homeassistant/homeassistant/setup.py", line 171, in async_setup_component
    result = await _async_setup_component(hass, domain, config)
  File "/usr/src/homeassistant/homeassistant/setup.py", line 340, in _async_setup_component
    component = await integration.async_get_component()
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1027, in async_get_component
    comp = self._get_component()
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1075, in _get_component
    ComponentProtocol, importlib.import_module(self.pkg_path)
2025-02-09 11:43:03.712 ERROR (MainThread) [homeassistant.loader] Unexpected exception importing component homeassistant.components.bluetooth
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1075, in _get_component
    ComponentProtocol, importlib.import_module(self.pkg_path)
                       ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/util/loop.py", line 201, in protected_loop_func
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.13/importlib/__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 1026, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/usr/src/homeassistant/homeassistant/components/bluetooth/__init__.py", line 10, in <module>
    from bleak_retry_connector import BleakSlotManager
  File "/usr/local/lib/python3.13/site-packages/bleak_retry_connector/__init__.py", line 11, in <module>
    from bleak import BleakClient, BleakScanner
  File "/usr/local/lib/python3.13/site-packages/bleak/__init__.py", line 50, in <module>
    from .backends.client import BaseBleakClient, get_platform_client_backend_type
  File "/usr/local/lib/python3.13/site-packages/bleak/backends/client.py", line 22, in <module>
    from ..exc import BleakError
SyntaxError: source code string cannot contain null bytes
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1015, in async_get_component
    comp = await self.hass.async_add_import_executor_job(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        self._get_component, True
        ^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/usr/local/lib/python3.13/concurrent/futures/thread.py", line 59, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1086, in _get_component
    raise ImportError(f"Exception importing {self.pkg_path}") from err
ImportError: Exception importing homeassistant.components.bluetooth
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1075, in _get_component
    ComponentProtocol, importlib.import_module(self.pkg_path)
                       ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/util/loop.py", line 201, in protected_loop_func
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.13/importlib/__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 1026, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/usr/src/homeassistant/homeassistant/components/bluetooth/__init__.py", line 10, in <module>
    from bleak_retry_connector import BleakSlotManager
  File "/usr/local/lib/python3.13/site-packages/bleak_retry_connector/__init__.py", line 11, in <module>
    from bleak import BleakClient, BleakScanner
  File "/usr/local/lib/python3.13/site-packages/bleak/__init__.py", line 50, in <module>
    from .backends.client import BaseBleakClient, get_platform_client_backend_type
  File "/usr/local/lib/python3.13/site-packages/bleak/backends/client.py", line 22, in <module>
    from ..exc import BleakError
SyntaxError: source code string cannot contain null bytes
2025-02-09 11:43:03.722 ERROR (MainThread) [homeassistant.setup] Setup failed for 'bluetooth': Unable to import component: Exception importing homeassistant.components.bluetooth
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1075, in _get_component
    ComponentProtocol, importlib.import_module(self.pkg_path)
                       ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/util/loop.py", line 201, in protected_loop_func
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.13/importlib/__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 1026, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/usr/src/homeassistant/homeassistant/components/bluetooth/__init__.py", line 10, in <module>
    from bleak_retry_connector import BleakSlotManager
  File "/usr/local/lib/python3.13/site-packages/bleak_retry_connector/__init__.py", line 11, in <module>
    from bleak import BleakClient, BleakScanner
  File "/usr/local/lib/python3.13/site-packages/bleak/__init__.py", line 50, in <module>
    from .backends.client import BaseBleakClient, get_platform_client_backend_type
  File "/usr/local/lib/python3.13/site-packages/bleak/backends/client.py", line 22, in <module>
    from ..exc import BleakError
SyntaxError: source code string cannot contain null bytes
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1015, in async_get_component
    comp = await self.hass.async_add_import_executor_job(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        self._get_component, True
        ^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/usr/local/lib/python3.13/concurrent/futures/thread.py", line 59, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1086, in _get_component
    raise ImportError(f"Exception importing {self.pkg_path}") from err
ImportError: Exception importing homeassistant.components.bluetooth
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1075, in _get_component
    ComponentProtocol, importlib.import_module(self.pkg_path)
                       ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/util/loop.py", line 201, in protected_loop_func
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.13/importlib/__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 1026, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/usr/src/homeassistant/homeassistant/components/bluetooth/__init__.py", line 10, in <module>
    from bleak_retry_connector import BleakSlotManager
  File "/usr/local/lib/python3.13/site-packages/bleak_retry_connector/__init__.py", line 11, in <module>
    from bleak import BleakClient, BleakScanner
  File "/usr/local/lib/python3.13/site-packages/bleak/__init__.py", line 50, in <module>
    from .backends.client import BaseBleakClient, get_platform_client_backend_type
  File "/usr/local/lib/python3.13/site-packages/bleak/backends/client.py", line 22, in <module>
    from ..exc import BleakError
SyntaxError: source code string cannot contain null bytes
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/setup.py", line 340, in _async_setup_component
    component = await integration.async_get_component()
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1035, in async_get_component
    self._component_future.result()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1027, in async_get_component
    comp = self._get_component()
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1086, in _get_component
    raise ImportError(f"Exception importing {self.pkg_path}") from err
ImportError: Exception importing homeassistant.components.bluetooth
2

Restored to backup core-2024.12.5. Everything working fine again. I guess I will wait before updating again.

3

Hi midadami,

I checked with an expert, there were some reports of the down load interrupting around the first of the year. Something with the download getting interrupted and arriving incomplete. Maybe a power interruption was suspected.

The fix there was to back up to a working version, like you did, then just try again and make sure it has a chance to complete before doing anything else with it.
That is the suggestion I got. So make sure you have a current backup and try again.

1 Like
4

Thanks very much. After updating again it works fine!!

1 Like