AttributeError: 'NoneType' object has no attribute 'send_data'

[TheZoker]

The problem

Since the last update I got this error in my logs

What version of Home Assistant Core has the issue?

core-2025.4.0b0

What was the last working version of Home Assistant Core?

core-2025.3.x

What type of installation are you running?

Home Assistant OS

Integration causing the issue

zha

Link to integration documentation on our website

https://rc.home-assistant.io/integrations/zha/

Diagnostics information

No response

Example YAML snippet

Anything in the logs that might be useful for us?

Traceback (most recent call last):
  File "/usr/local/lib/python3.13/site-packages/zigpy/application.py", line 661, in _watchdog_loop
    await self.watchdog_feed()
  File "/usr/local/lib/python3.13/site-packages/zigpy/application.py", line 647, in watchdog_feed
    await self._watchdog_feed()
  File "/usr/local/lib/python3.13/site-packages/bellows/zigbee/application.py", line 997, in _watchdog_feed
    current_counters = await self._ezsp.read_counters()
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/site-packages/bellows/ezsp/v4/__init__.py", line 191, in read_counters
    (res,) = await self.readCounters()
             ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/site-packages/bellows/ezsp/protocol.py", line 126, in command
    await self._gw.send_data(data)
  File "/usr/local/lib/python3.13/site-packages/bellows/uart.py", line 31, in send_data
    await self._transport.send_data(data)
          ^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'send_data'

Traceback (most recent call last):
  File "/usr/local/lib/python3.13/site-packages/bellows/ezsp/v8/__init__.py", line 51, in pre_permit
    await self.setPolicy(
    ...<2 lines>...
    )
  File "/usr/local/lib/python3.13/site-packages/bellows/ezsp/protocol.py", line 126, in command
    await self._gw.send_data(data)
  File "/usr/local/lib/python3.13/site-packages/bellows/uart.py", line 31, in send_data
    await self._transport.send_data(data)
          ^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'send_data'

Additional information

No response

[home-assistant]

Hey there @dmulcahey, @Adminiuga, @puddly, @TheJulianJES, mind taking a look at this issue as it has been labeled with an integration (zha) you are listed as a code owner for? Thanks!

Code owner commands

Code owners of zha can trigger bot actions by commenting:

• @home-assistant close Closes the issue.
• @home-assistant rename Awesome new title Renames the issue.
• @home-assistant reopen Reopen the issue.
• @home-assistant unassign zha Removes the current integration label and assignees on the issue, add the integration domain after the command.
• @home-assistant add-label needs-more-information Add a label (needs-more-information, problem in dependency, problem in custom component) to the issue.
• @home-assistant remove-label needs-more-information Remove a label (needs-more-information, problem in dependency, problem in custom component) on the issue.

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[puddly]

This error says that your radio is no longer connected and that pending requests have failed due to this.

Please upload a ZHA debug log of the integration loading.