RoadRunners – Communication Protocol
TF -
Protocol of communication
5
January 2007
1.2. Control messages
1.2.1. Specifics packets
These 2 sequences will be recognized and purged for backward compatibility with other
Baracoda products.
1.2.2. Acknowledgment packets
These messages acknowledge the reception of a valid message with the expected sequence
number 0xYY, before processing it.
For captured data from the scanner, ACK and NAK have the same meaning but will trigger a
different event on the scanner (see User Interface issues)
1.2.3. Synchronisation packet
This message acknowledges the reception of a message to acknowledge with an unexpected
sequence number. 0xYY is the expected sequence number.
The device will resynchronize its remote sequence number when receiving this message.
Code ID
Description
Frame
0x01 Legacy
0x01 0x01 0x01
or
0x01 0x02 0x01
Code ID
Description
Frame
0x06
ACK
0x06 0x01 0xYY
0x15
NACK
0x15 0x01 0xYY
Code ID
Description
Frame
0x16
SYN
0x16 0x01 0xYY