Thingmagic M5e-Compact Manual do Utilizador descarregar pdf (Página 240)

Release Version 1.0.34

240 Appendix D: Deprecated and Modified Commands

Read Tag Data (28h)

The Read Tag Data command reads data from the tag. Because each protocol has

different formats for reading / writing data, the address field may have different meanings.

The general format for the Read Tag Data command is shown in the following example.

The tag ID field can be either 8 or 12 bytes, depending on whether it is a 64-bit or 96-bit

tag.

GEN2 Command and Response

The Read Tag Data command for the GEN2 protocol has the following format. This

example reads the first 16-bit word of the EPC stored in a tag using the GEN2 protocol

Read command.

Read Tag Data Command

The MemBank, Address, and WordCount fields correspond to the MemBank, WordPtr,

and WordCount arguments to the GEN2 protocol Read command, respectively. The

MemBank options are listed in the Write Tag Data (24h)

section of this document.

Refer to the EPC Global GEN2 protocol specification for more details about the tag

memory map.

FF M + 6 28 03 E8 00 00 00 10 M bytes ?? ??

SOH Length OpCode Timeout (ms) Address Tag ID (M bytes) CRC

FF 08 28 03 E8 01 00 00 00 02 01 ?? ??

SOH Length OpCode Timeout (ms) MemBank Address WordCount CRC

1 2 ... 235 236 237 238 239 240 241 242 243 244 245 ... 251 252

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