#Smart Reader Tag Events

#Context

One of these Events is sent when the Smart Reader has read a Tag, or has detected that the tag has been removed from its field (if the Reader is configured accordingly).

#Event codes and data

#Difference between Tag read and Tag inserted/removed

Whether the Tag read event is sent alone, or the Tag inserted/Tag removed events are sent in pair, depends on the configuration of the Smart Reader. See Smart Reader features.

#If the device is configured to send the Tag read event

• The Tag read event (B0) is fired when a new Tag is read, with the field New in the TagInfo value set to 1 (true).
• No event is fired when the Tag is removed from the Reader.
• In case the Tag stays on the Reader, the Reader fires the Tag read event (B0) again after a few seconds. In this case, the field New is cleared to 0 (false). The interval is specified in the Smart Reader timings.

#If the device is configured to send the Tag inserted/removed events

• The Tag inserted event (B1) is fired when a new Tag is read. The host application knows that this is a Tag inserted event because the TagInfo and TagId data are present.
• No event is fired while the Tag stays on the Reader.
• When the Tag is removed from the Reader, the Reader fires the Tag removed event (B1). The host application may use the TagIndex entry to know which of the previously inserted Tags has been removed.