User's Manual

UHF RFID Reader UR - SERIES User Manual v1.14
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RSSI: 1 byte, the reader signal strength at the time when the tag is inquired.
NOTE:
Data packet will be uploaded according to EPC inquired order. For every tag, reader will firstly
upload the tag EPC in the initial data packet, further tag data will be uploaded in the second data
packet. These two packets will have sequential serial number.
In the case when reader fails to read data of a tag after uploaded the EPC packet, reader will not
upload any tag data packet. Reader will continue to inquire the next tag and restart the normal mix
inventory process.
8.2.22 Inventory with EPC number
The function of this command is to inquire tag with specific EPC. Reader will only response data
from the tag with corresponding EPC. All other tags with different EPC will be ignored.
Command frame:
Len
Adr
Cmd
Data[]
CRC-16
0xXX
0xXX
0x1a
——
LSB
MSB
Parameters of Data[]:
Data[]
MatchType
MatchLen
MatchOffset
EPCData
0xXX
2 bytes
2 bytes
variable
Parameter definition
MatchType: EPC number matching type.
0 – inquire tag with corresponding EPC;
1 – inquire all other tags with different EPC.
All other values are reserved, reader will return a parameter error status in the response frame if
other value is delivered in this field.
MatchLen: 2 bytes, most-significant byte first, the bit length of the defined EPC number. The range
of MatchLen is 1 ~ 196 bits.
MatchOffset: 2 bytes, most-significant byte first. The entry address of the defined EPC (unit: bits).
The range of MatchOffset is 0 ~ 495 bits.
NOTE:
The sum of MatchLen and MatchOffset should not exceed 496 bits. Reader will return a
parameter error status in the response frame if incorrect value is delivered in this field.
EPCData: the defined EPC number data. The length of EPCData equals to MatchLen/8. If
MatchLen is not a multiple of 8 integer, the length of EPCData is equal to the int[MatchLen /8]+1.
Non-specified lower significant figures should be filled up with 0.