Hi everyone, I wanted to share my experience with resolving KNX communication issues in Home Assistant. I recently encountered a problem where adding a second switch caused instability in my setup. After hours of troubleshooting, I discovered that the issue stemmed from how the KNX addresses were configured in my configuration.yaml file. Here’s what I learned:
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Check Address Conflicts: Ensure that the
addressandstate_addressfor each switch are unique and don’t overlap with existing devices in your KNX network. Overlapping addresses can cause conflicts and instability. -
Update KNX Binding: If you’re using an older version of the KNX binding, consider updating to the latest release. I found that newer versions have improved handling of multiple devices and better error logging.
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Review Logs Thoroughly: The logs provided invaluable insights. I noticed recurring errors related to
group_readandstate_addresswhich pointed me toward addressing conflicts in my configuration. -
Test Incrementally: When adding new devices, test one at a time to isolate issues. This approach helped me identify that the problem wasn’t with the hardware but with the configuration.
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Use Cache Wisely: I disabled the
cacheoption temporarily to ensure that the KNX bus was responding correctly. After resolving the issue, I re-enabled it for optimized performance.
By addressing these points, my KNX setup now runs smoothly with multiple switches. I hope this helps anyone else facing similar challenges! 