Thingmagic M5e-Compact Manual do Utilizador descarregar pdf (Página 113)

Application Tag Commands

Command Set 113

 FAULT_GEN2 PROTOCOL_MEMORY_LOCKED - 424h

 FAULT_ANTENNA_NOT_CONNECTED – 503h

 FAULT_TEMPERATURE_EXCEED_LIMITS – 504h

 FAULT_HIGH_RETURN_LOSS – 505h

Get Tag Buffer (29h)

After a Read Tag Multiple 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:

Tags Left = WriteIndex - ReadIndex

The following response shows there are three tags left in the buffer, and the first one has

already been read (the read index parameter starts counting from 0.):

FF 00 29 1D 26

SOH Length OpCode CRC

FF 04 29 00 00 00 01 00 04 87 72

SOH Length OpCode Status ReadIndex WriteIndex CRC

1 2 ... 108 109 110 111 112 113 114 115 116 117 118 ... 251 252

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Thingmagic M5e-Compact Manual do Utilizador Página 113