Programming Guide - HR2150-HP HP Value Barcode Scanner

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Data Packing
Introduction
Data packing is designed for a specific group of users who want to have the data packed before transmission. Data packing
influences data format, so it is advised to disable this feature when it is not required.
Data Packing Options
Disable Data Packing: Transmit decoded data in raw format (unpacketed).
Enable Data Packing, Format 1: Transmit decoded data with the packet format 1 defined below.
Packet format 1: [STX + ATTR + LEN] + [AL_TYPE + DATA] + [LRC]
STX: 0x02
ATTR: 0x00
LEN: Barcode data length is expressed in 2 bytes ranging from 0x0000 (0) to 0xFFFF (65535).
AL_TYPE: 0x36
DATA: Raw barcode data.
LRC: Check digit.
LRC calculation algorithm: computation sequence: 0xFF+LEN+AL_TYPE+DATA; computation method is XOR, byte
by byte.
Enable Data Packing, Format 2: Transmit decoded data with the packet format 2 defined below.
Packet format 2: [STX + ATTR + LEN] + [AL_TYPE] + [Symbology_ID + DATA] + [LRC]
STX: 0x02
ATTR: 0x00
LEN: Barcode data length is expressed in 2 bytes ranging from 0x0000 (0) to 0xFFFF (65535).
AL_TYPE: 0x3B
Symbology_ID: The ID number of symbology, 1 byte.
DATA: Raw barcode data.
LRC: Check digit.
LRC calculation algorithm: computation sequence: 0xFF+LEN+AL_TYPE+Symbology_ID+DATA; computation
method is XOR, byte by byte.