Breaking change

Proposed change

Serial connections for DSMR go through serialx, which also accepts URLs such as socket://host:port as the port. For a URL with a scheme it doesn't support, like http://192.168.1.20:23, it raises UnknownUriScheme, a SerialException that is not an OSError. The config flow only handled OSError, so the flow crashed and showed "Unknown error".

The connection validation now also handles serialx's SerialException, so the user gets the regular "Failed to connect" error and can correct the port. serialx is already a dependency of dsmr-parser, which uses it for the connection.

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 DSMR integration does not accept the IP address. #179492
• This PR is related to issue:
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• Link to developer documentation pull request:
• Link to frontend pull request:

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