SSI Commands

SSI Commands

The following table lists all the SSI opcodes the scanner supports. The host transmits opcodes designated type H. The scanner (decoder) transmits type D opcodes and transmits Host/Decoder (H/D) types.
SSI Commands
Name
Type
Opcode
Description
AIM_OFF
H
0xC4
Deactivate aiming pattern.
AIM_ON
H
0xC5
Activate aiming pattern.
BEEP
H
0xE6
Sound the beeper.
CAPABILITIES_REPLY
D
0xD4
Reply to CAPABILITIES_REQUEST; contains a list of the capabilities and commands the decoder supports.
CAPABILITIES_REQUEST
H
0xD3
Request capabilities report from the decoder.
CMD_ACK
H/D
0xD0
Positive acknowledgment of received packet.
CMD_NAK
H/D
0xD1
Negative acknowledgment of received packet.
DECODE_DATA
D
0xF3
Decode data in SSI packet format.
EVENT
D
0xF6
Event indicated by associated event code.
LED_OFF
H
0xE8
De-activate LED output.
LED_ON
H
0xE7
Activate LED output.
PARAM_DEFAULTS
H
0xC8
Set parameter default values.
PARAM_REQUEST
H
0xC7
Request values of certain parameters.
PARAM_SEND
H/D
0xC6
Send parameter values.
REPLY_REVISION
D
0xA4
Reply to REQUEST_REVISION, contains the decoder's software/hardware configuration.
REQUEST_REVISION
H
0xA3
Request the decoder's configuration.
SCAN_DISABLE
H
0xEA
Prevent the operator from scanning barcodes.
SCAN_ENABLE
H
0xE9
Permit barcode scanning.
START_DECODE
H
0xE4
Tell the decoder to attempt to decode a barcode.
STOP_DECODE
H
0xE5
Tell the decoder to abort a decode attempt.
For details of the SSI protocol, refer to the Simple Serial Interface Programmer's Guide.