User Guide

Table Of Contents
Multi-Protocol Tag Commands
51
Multi-Protocol Tag Commands
The application commands are used to interact with RFID tags in the field. These
commands can have slightly different behavior based upon the current protocol selected
in the system.
Applications Commands
Get Tag Buffer (29h)
After a Multi-Protocol Tag Read command is executed, the found tags are stored in an
internal
Tag Buffer. The Get Tag Buffer command can perform several different
operations depending on the syntax used. These operations are:
Get tags remaining in the tag buffer
Get tag EPCs
Get tag EPCs and their Tag Read Meta Data.
Get Tags Remaining
To determine the number of tags remaining in the buffer, send the Get Tag Buffer
command with a data length of zero:
This command returns the current read index, the location of the next tag to be read, and
the current write index, the location where the next tag will be written. These two numbers
can be used to get the number of tags left in the tag buffer:
OpCode Command Name
0x29
Get Tag Buffer (29h)
0x2A
Clear Tag Buffer (2Ah)
0x2F
Multi-Protocol Tag Read (2Fh)
FF 00 29 1D 26
SOH Length OpCode CRC