int vscphlp_getMeasurementSubZone( const vscpEvent *pEvent )
Poniter to VSCP measurement event.
Zone is returned as 0-255 where 255 means “all zones”. -1 is returned if the event is not a measurement event or is invalid. Some events does not have a subzone defined and for them zero is always returned.
Get subzone for a measurement event.
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