Home Assistant - Fritz Repater: Error refreshing hosts info

[ck-zeroone]

Hi,
when using the Fritz Integration in Home Assistant it fails to connect to the repater with error: Error refreshing hosts info

It's a FRITZ!WLAN Repater DVB-C on FritzOS 07.04 (which is the latest version available).
Home Assistant is on Version 2025.3.2.

Here the debug-log:

Logger: homeassistant.components.fritz.coordinator
Quelle: helpers/update_coordinator.py:380
Integration: AVM FRITZ!Box Tools ([Dokumentation](https://www.home-assistant.io/integrations/fritz), [Probleme](https://github.com/home-assistant/core/issues?q=is%3Aissue+is%3Aopen+label%3A%22integration%3A+fritz%22))
Erstmals aufgetreten: 19:06:18 (9 Vorkommnisse)
Zuletzt protokolliert: 19:11:43
Unexpected error fetching fritz-192.168.19.188-coordinator data

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/fritz/coordinator.py", line 443, in _async_update_hosts_info
    hosts_attributes = await self.hass.async_add_executor_job(
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        self.fritz_hosts.get_hosts_attributes
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/usr/local/lib/python3.13/concurrent/futures/thread.py", line 59, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/usr/local/lib/python3.13/site-packages/fritzconnection/lib/fritzhosts.py", line 216, in get_hosts_attributes
    storage = HostStorage(get_xml_root(source=url, session=self.fc.session))
                          ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/site-packages/fritzconnection/core/utils.py", line 78, in get_xml_root
    source = get_content_from(source, timeout=timeout, session=session)
  File "/usr/local/lib/python3.13/site-packages/fritzconnection/core/utils.py", line 56, in get_content_from
    return do_request()
  File "/usr/local/lib/python3.13/site-packages/fritzconnection/core/utils.py", line 51, in do_request
    return handle_response(response)
  File "/usr/local/lib/python3.13/site-packages/fritzconnection/core/utils.py", line 44, in handle_response
    raise FritzResourceError(message)
fritzconnection.core.exceptions.FritzResourceError: Unable to retrieve resource 'http://192.168.19.188:49000/devicehostlist.lua?sid=64aff76290f232f6' from the device.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/update_coordinator.py", line 380, in _async_refresh
    self.data = await self._async_update_data()
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/fritz/coordinator.py", line 338, in _async_update_data
    await self.async_scan_devices()
  File "/usr/src/homeassistant/homeassistant/components/fritz/coordinator.py", line 571, in async_scan_devices
    hosts = await self._async_update_hosts_info()
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/fritz/coordinator.py", line 452, in _async_update_hosts_info
    raise HomeAssistantError(
    ...<2 lines>...
    ) from ex
homeassistant.exceptions.HomeAssistantError: Error refreshing hosts info

[ck-zeroone]

fritzconnection is working and returns answers without an error on command:
X_AVM-DE_GetHostListPath

fritzhost also works fine

[kbr]

Thanks. So we can close this?

[ck-zeroone]

unfortunatly no :-/

even tough both commands are working, there must be a problem in the data or parsing of X_AVM-DE_GetHostListPath.
(the whole home assistant integration does not work with the Fritz Repeater)
@chemelli74 was helping me to find any hints.
The guess is, there must be a problem in one of those 2 lines:

fritzconnection/fritzconnection/lib/fritzhosts.py

Lines 215 to 216 in 0888b77

	url = f"{self.fc.address}:{self.fc.port}{path}"
	storage = HostStorage(get_xml_root(source=url, session=self.fc.session))

Do you need more information to localize the problem?

[kbr]

Ok, so what's in storage.hosts_attributes and what do you expect?

[chemelli74]

@kbr, the error shows a missing URL:

Unable to retrieve resource 'http://192.168.19.188:49000/devicehostlist.lua?sid=64aff76290f232f6' from the device.

but both X_AVM-DE_GetHostListPath and fritzhost are working.

Any idea on where to look for the guilty line ?

[kbr]

Well, that's weird. Will try to reproduce this.

[kbr]

Unfortunately – at least in terms of finding the bug – i'm unable to reproduce this. It works with my router (7590) and my repeater (2400):

fc = FritzConnection(address="192.168.178.37", use_cache=True)  # repeater
fh = FritzHosts(fc)
print(fc)
print(fh.get_hosts_attributes())

FRITZ!Repeater 2400 at http://192.168.178.37/
FRITZ!OS: None
[{'Index': 1, 'IPAddress': None, 'MACAddress': '14:85:7F:70:C4:2A' ...

Could it be that this is an issue with the DVB-C repeater? I wonder a bit, because as the repeater seems to support the X_AVM-DE_GetHostListPath action, one would assume that this returns a valid url.

[ck-zeroone]

Here's what I got (I haven't done any python before...)

I guess there's an problem in my script... or is this already the error?

here's my script

from fritzconnection import FritzConnection
from fritzconnection.lib.fritzhosts import FritzHosts

fc = FritzConnection(address="192.168.19.188", use_cache=True)  # repeater
fh = FritzHosts(fc)
print(fc)
print(fh.get_hosts_attributes())

here's the output

FRITZ!WLAN Repeater DVB-C at http://192.168.19.188
FRITZ!OS: None
Traceback (most recent call last):
  File "/root/env/fritz.py", line 7, in <module>
    print(fh.get_hosts_attributes())
          ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/env/lib/python3.11/site-packages/fritzconnection/lib/fritzhosts.py", line 213, in get_hosts_attributes
    result = self._action("X_AVM-DE_GetHostListPath")
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/env/lib/python3.11/site-packages/fritzconnection/lib/fritzhosts.py", line 43, in _action
    return self.fc.call_action(SERVICE, actionname, arguments=arguments, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/env/lib/python3.11/site-packages/fritzconnection/core/fritzconnection.py", line 456, in call_action
    return self.soaper.execute(service, action_name, arguments)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/env/lib/python3.11/site-packages/fritzconnection/core/soaper.py", line 286, in execute
    return handle_response(response)
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/env/lib/python3.11/site-packages/fritzconnection/core/soaper.py", line 268, in handle_response
    raise_fritzconnection_error(response)
  File "/root/env/lib/python3.11/site-packages/fritzconnection/core/soaper.py", line 166, in raise_fritzconnection_error
    raise FritzAuthorizationError(msg)
fritzconnection.core.exceptions.FritzAuthorizationError: Unable to perform operation. 401 Unauthorized (ERR_NONE) 401 Unauthorized ERR_NONE Webserver Wed, 26 Mar 2025 21:04:08 GMT

[kbr]

You have to provide the username and password as arguments to FritzConnection() or store them in the environment. I'm using the latter.

[ck-zeroone]

I used "admin" as user - the repeater does not need a username at the weblogin, so this is a guess.

(env) root@fritztest:~/env# python3 fritz.py 
FRITZ!WLAN Repeater DVB-C at http://192.168.19.188
FRITZ!OS: None
Traceback (most recent call last):
  File "/root/env/fritz.py", line 7, in <module>
    print(fh.get_hosts_attributes())
          ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/env/lib/python3.11/site-packages/fritzconnection/lib/fritzhosts.py", line 216, in get_hosts_attributes
    storage = HostStorage(get_xml_root(source=url, session=self.fc.session))
                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/env/lib/python3.11/site-packages/fritzconnection/core/utils.py", line 78, in get_xml_root
    source = get_content_from(source, timeout=timeout, session=session)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/env/lib/python3.11/site-packages/fritzconnection/core/utils.py", line 56, in get_content_from
    return do_request()
           ^^^^^^^^^^^^
  File "/root/env/lib/python3.11/site-packages/fritzconnection/core/utils.py", line 51, in do_request
    return handle_response(response)
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/env/lib/python3.11/site-packages/fritzconnection/core/utils.py", line 44, in handle_response
    raise FritzResourceError(message)
fritzconnection.core.exceptions.FritzResourceError: Unable to retrieve resource 'http://192.168.19.188:49000/devicehostlist.lua?sid=11348a253c6e1c2e' from the device.
(env) root@fritztest:~/env#                  

And yes, it could be a problem with the firmware of the repeater. I'm not the only one with this problem. On the home assistant repo there are lots of others with the same issue/problem, but without a solution.
Maybe we'll find or locate the problem, then we can send it to AVM to tell them. Even tough the repater is not available anymore, it got a firmware update to work with todays mesh system. So I hope that AVM will fix any errors in the firmware.