User Guide

Table Of Contents
Gen2 Tag Commands
126
Read Tag Data Get Data and Metadata Response Fields
The following example will attempt to read the Access Password (the first 2 words) from
Reserved Memory. It will read this data from a tag matching the following criteria for a
max timeout of 1000 ms.
Memory Bank = EPC.
Starting Address = bit 120 (beginning of the last byte of the EPC value: 16 PC bits + 16
CRC bits + 88 EPC bits)
Select Data = 0x34
Field Length Value
SOH 1 byte 0xFF
Length 1 byte Based on data returned
OpCode 1 byte 0x21
Options 1 byte As sent in request
Metadata Flags 2 bytes Metadata contained in response
Read Count
1
1 byte Tag EPC/Antenna Read Count
RSSI
1
1 byte Return Signal Strength Indicator
Antenna ID
1
1 byte Antenna ID, 4 MSBs for TX and 4
LSBs for RX
Frequency
1
3 bytes Frequency in kHz
Timestamp
1
4 bytes RTC Timestamp
RFU
1
2 bytes Reserved for Future Use - ThingMagic
Only
Protocol ID 1 byte Protocol ID of tag read
Tag Data N bytes Request Tag Data.
CRC 2 bytes Message CRC
1 - Conditionally returned depending on the Metadata Fields specified in the request.