Baracoda IDBlue, Дополнительное руководство

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IDBlue – Communication Protocol v2.4.1 - 47 -
Data Capture
for Workforce
in Motion
Glossary
Block
Information that is digitally stored on a RFID tag is organized as a series of
blocks. Typically, each block consists of 4 to 8 bytes of data and a single tag
may contain up to 256 individual blocks.
Bluetooth
An industrial specification for small wireless networks. IDBlue™
communicates with a host device (e.g., Pocket PC or desktop) using this
communication standard. Specifically, the serial port profile (SPP) is used to
create a communications channel to the device that makes it appear as if the
device is connected to the host via a wired serial port link.
CRC Cyclic Redundancy Check. This is a small amount of data appended to a data
packet in order to provide error-checking over a communications channels,
such as a wireless Bluetooth link. Also referred to as “Checksum” throughout
this document. The IDBlue™ serial protocol uses a simple XOR-based method
for CRC calculation.
Device Default Settings
Refers to an IDBlue™ device.
These are the settings an IDBlue™ device has when powered on. They are
stored in a persistent section of the onboard memory.
Id
The identifying number that is associated with an RFID tag. This number is
read-only and is unique to each tag.
Session Settings These are the settings for an IDBlue™ device once it has been powered on.
They may be changed while the device is powered on, but the settings are
lost once the device is turned off or shuts down.
Tag The small integrated circuit with which an RFID reader (such as IDBlue™)
communicates. Information is digitally stored on these circuits and may be
retrieved or modified using common RFID operations, such as read block,
write block, lock block, etc….