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5.4 Notion of events
During asynchronous read (or default read), the reader continuously tries to read
all tags in the RF field. When a tag is detected, one or several events are pushed
into an internal event buffer. Those events contain information such as the kind
of event (see below), a timestamp, the channel on which the event occurred, the
tag type and the associated tag data (UID, memory…). The following events are
supported:
●
“Tag Read”: This event is pushed each time a valid tag frame is decoded,
without further processing. When activated, this event may be triggered several
hundreds of times persecond and is consequently bandwidth consuming. It is
often used for testing purpose only.
●
“Tag New”: This event is pushed each time a new tag is detected. If the same
tag is detected several times, it will be reported only once.
●
“Tag In”: This event is pushed each time a tag enters the RF field.
●
“Tag Out”: This event is pushed each time a tag leaves the RF field.
●
“Tag No Read”: When Input triggered read mode is active, this event is
pushed when the trigger condition ends and no tag was detected in the RF field.
When Input triggered read mode is inactive, this event is never pushed.
