Thingmagic M5e-Compact Bedienungsanleitung Seite 110

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Seitenansicht 109
Application Tag Commands
110 Command Set
Read Tag Data Get Data and Metadata Request Fields
A response can contain the following information:
Read Tag Data Get Data and Metadata Response Fields
Field Value Description
Option Bit 4=0
(0x0X)
No Metadata flags are specified and Meta Data will not be
returned. This is the
Get Tag Data syntax. The lower bits (X) are
specified as defined by
Tag Singulation/Select Functionality.
Bit 4=1
(0x1X)
Indicates that Metadata flags are to follow and the corresponding
Metadata shall be returned with the tag data. The lower bits (X)
are specified as defined by
Tag Singulation/Select Functional-
ity.
Metadata Flags
(to specify more
than one OR
the values
together)
0x0000 When no flags are set no meta data will be returned, only the tag
data.
0x0001 When bit 0 is set the Read Count will be returned
0x0002 When bit 1 is set the LQI/RSSI will be returned
0x0004 When bit 2 is set the Antenna ID will be returned
0x0008 When bit 3 is set the Frequency will be returned
0x0010 When bit 4 is set the Timestamp will be returned
0x0020 When bit 5 is set the RFU (ThingMagic Only) will be returned
0x0040 When bit 6 is set the Protocol ID will be returned.
0x0080 When bit 7 is set Tag Data information will be returned.
Tag Data is always returned for Read Tag Data, this field cause
an extra 2 bytes, always 0x0000, to be returned for Tag Data
Length
These fields are followed by the
Read Tag Data Fields then the Tag Singulation/Select Func-
tionality (set appropriate bits in the Option field defined above, do not specified an addi-
tional Option field), used the same as defined in the Get Tag Data
syntax, as necessary.
Field Length Value
SOH 1 byte 0xFF
Length 1 byte Based on data returned
OpCode 1 byte 0x28
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