ACS ACR31 Swipe Card Reader - Manual (Page 14)

ACR31 – Reference Manual [email protected]
Version 1.00
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6.7. RDR_to_SPH_FirmwareVersion
This message is sent by ACR31 in response to the command message
SPH_to_RDR_FirmwareVersion.
Offset Field Size Value Description Encrypted
0 bStartByte 1 23h Message start byte.
No
1 wLength 2 000Fh
Number of extra bytes starting
from the next field for this
message.
3 bMessageType 1 81h
4 abFirmwareVersion 12 Firmware version string.
16 wCheckSum 2
CRC16 checksum for all the
preceding fields.