Description
Hi,
if devices run into issues, like cannot measure a value correctly, there's no chance to communicate this to the controller (e.g. SmartHome system).
Not updating the value means that the currently retained value will remain unchanged, which is a wrong information.
I'd like to see a possibility to explicitly tell the controller that there is no value available. Unfortunately, currently this can only be done by defining a "special value" within the current value range that must be known by both devices and filtered out accordingly. For some applications, there is no value that can be excluded from the value range to serve this purpose.
Long story short: I'd like to see an update in the convention that defines a NULL value, irrespective of the data type.
Best regards,
stedon81