Symbol SE955 Integration Manual page 204

10-20 SE955 Integration Guide
REQUEST_REVISION
Description: Request the software revision string from the decoder
Packet Format
Length
Field Descriptions
Field Name
Length
Opcode
Message
Source
Status
Data
Checksum
Host Requirements
The host sends this message to request revision information from the decoder. The decoder responds with REPLY_REVISION.
Decoder Requirements
The decoder sends its revision string to the host. See
SCAN_DISABLE
Description: Prevent the decoder from scanning bar codes
Packet Format
Length
Field Descriptions
Field Name
Length
Opcode
Message
Source
Status
Data
Checksum
Opcode
0x04 0xA3
Format
Length of message (not
including checksum).
0xA3
4 = Host
Bit 0: Retransmit
Bit 1-7: Unused
2's complement sum of
message contents
excluding checksum.
REPLY_REVISION
Opcode
0x04 0xEA
Format
Length of message (not
including checksum).
0xEA
4 = Host
Bit 0: Retransmit
Bit 1-7: Unused
2's complement sum of
message contents excluding
checksum.
Message Source Status
0x04
Size
1 Byte Length Field
1 Byte Identifies this Opcode type.
1 Byte Identifies where the message is coming
from.
1 Byte Identifies the transmission status.
Unused bits must be set to 0.
None
2 Bytes Checksum of message.
for format.
Message Source Status
0x04
Size
1 Byte Length Field
1 Byte Identifies this Opcode type.
1 Byte Identifies where the message is coming
from.
1 Byte Identifies the transmission status.
Unused bits must be set to 0.
None
2 Bytes Checksum of message.
Data Checksum
Description
Data Checksum
Description