Event/Query Protocol; Client Software Requests/Functionality - Omron V740-BA50C22A-US Operation Manual

2.2 Event/Query Protocol

The client software can control the reader using RQL
via TCP connection and can acquire data from the
readers in two modes: 1) by requesting specific data
or 2) by automatically receiving events. The two
modes are discussed in further detail in the following
subsections.
In order to keep the protocol comprehensive and easy
to use, we specify a small set of commands that allow
the client software to fully configure the readers and
exploit their capabilities.
This minimal set of commands includes the ability to
request reads based on several relevant criteria (for
example, group reads, range reads, reads by prefix,
and so on). The ability to reset the reader database
and other control capabilities are also provided for.
Client PC
1. Query
id
protocol_id
antenna_id
read_count
RQL Engine
2. Tag population/general query is made
protocol
id
id
0x1234 EPC1
0xABCD EPC1
Figure 1 : Conceptual diagram of control flow
V740 RFID READER/WRITER, ANTENNA
OPERATION MANUAL
3. Reply
0x1234
0xABCD
EPC1
EPC1
2 1
1
2
V740 Reader/Writer
antenna read
id count
2 1
1 2
2.2.1 Client Software
Requests/Functionality
The client software is able to make the following
requests of a reader:
•
Read IDs of all tags within range of all antennas.
•
Read IDs of all tags within range of a given
antenna.
•
Read IDs of all tags within a certain subset of tag
IDs within range of all antennas.
•
Read IDs of all tags within a certain subset of tag
IDs within range of a specific antenna.
•
Read Individual tag IDs within range of a certain
antenna or all antennas.
•
Read only the IDs of tags communicating a given
RF communication protocol.
•
Return the number of times a given tag was read
per query.
•
Write IDs to a tag.
•
Register any commands as aliases (cursor) to the
V740 reader.
•
Execute any aliases (cursor) one time
•
Execute any aliases (cursor) repeatedly at the
indicated interval.
•
Execute any aliases (cursor) repeatedly in the
specified term.
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2005-09, REV0.1
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