SIMPLE SERIAL INTERFACE
75
SCAN_DISABLE
Description: Prevent the reader from scanning barcodes
Packet
Format
Length
Opcode
Message Source
Status
Data Checksum
0X04
0XEA
0X04
Field Descriptions
Field Name
Format
Size
Description
Length
Length of message (not
including checksum).
1 Byte
Length Field
Opcode
0XEA
1 Byte
Identifies this opcode type.
Message
Source
4 = Host
1 Byte
Identifies where the message
is coming from.
Status
Bit 0: Retransmit
Bit 1-7: Unused
1 Byte
Identifies the transmission
status.
Unused bits must be set to 0.
Data
None
Checksum
2's complement sum of
message contents
excluding checksum.
2 Byte
Checksum of message.
Host Requirements
All scan attempts are disabled by this command until either a SCAN_ENABLE is
sent, or the reader
is reset.
Reader Requirements
When the reader
receives this command, it ignores all trigger requests until a
SCAN_ENABLE command is received.
Содержание Dragon D151
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