Quality and Timestamps

The KNX driver implements quality and timestamp information, with GOOD and BAD quality levels used to reflect the state of a cache value.

A tag will be flagged as bad quality on the basis of either a data type/size mismatch, or for exceeding the cache lifetime.

The quality and timestamp values are used in relation to cache lifetime management. Because no two group addresses can be blocked together, the driver will use the quality value to return #COM for an individual tag.

See KNX Parameters.