Bump python-bsblan to 5.2.1

[liudger]

Breaking change

Proposed change

https://github.com/liudger/python-bsblan/releases/tag/v5.2.1
liudger/python-bsblan@v5.2.0...v5.2.1

Made the detect circuit function less strict. Climate entities was failing to setup for some users.
This is a bugfix and should be in next sub release!

(generated)

This pull request updates the python-bsblan dependency from version 5.2.0 to 5.2.1 across the Home Assistant BSBLan integration and its related requirement files. This ensures that the integration uses the latest bug fixes and improvements from the upstream library.

Dependency updates:

• Updated the python-bsblan requirement to version 5.2.1 in the homeassistant/components/bsblan/manifest.json file.
• Updated the python-bsblan version to 5.2.1 in requirements_all.txt for production dependencies.
• Updated the python-bsblan version to 5.2.1 in requirements_test_all.txt for test dependencies.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes bsblan climate entity permanently unavailable after upgrade to 2026.5.0 #170056
• This PR is related to issue:
• Link to documentation pull request:
• Link to developer documentation pull request:
• Link to frontend pull request:

Checklist

• I understand the code I am submitting and can explain how it works.
• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist
• I have followed the perfect PR recommendations
• The code has been formatted using Ruff (ruff format homeassistant tests)
• Tests have been added to verify that the new code works.
• Any generated code has been carefully reviewed for correctness and compliance with project standards.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

If the code communicates with devices, web services, or third-party tools:

• The manifest file has all fields filled out correctly.
  Updated and included derived files by running: python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
• For the updated dependencies a diff between library versions and ideally a link to the changelog/release notes is added to the PR description.

To help with the load of incoming pull requests:

• I have reviewed two other open pull requests in this repository.

[Copilot]

Pull request overview

This pull request bumps the python-bsblan library version used by the BSBLan integration to pick up upstream fixes (notably around less-strict circuit detection that impacted climate entity setup).

Changes:

• Updated homeassistant/components/bsblan/manifest.json to require python-bsblan==5.2.1.
• Updated generated dependency pins in requirements_all.txt and requirements_test_all.txt to python-bsblan==5.2.1.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
homeassistant/components/bsblan/manifest.json	Bumps the BSBLan integration’s pinned library requirement to 5.2.1.
requirements_all.txt	Updates the production dependency pin for python-bsblan to 5.2.1.
requirements_test_all.txt	Updates the test dependency pin for python-bsblan to 5.2.1.

[liudger]

Failed test is not related to this pull request