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Appendix II Diver Communication Protocol
Introduction
The TD-Diver supports a set of commands that allows the user to communicate with the Diver through
other software than Diver-Office. The following commands are available:
•
reading measured/stored data
•
read date/time
•
read serial number
•
read monitoring point name
•
real-time pressure and temperature value including time stamp
•
read sample mode (record method and interval)
•
read product ID, name, and firmware version
•
read remaining battery capacity
•
read status: started, stopped, future start, free memory
Serial Port Settings
Bitrate:
9600
Parity:
None
Databits:
8
Stopbits:
1
Frame Format
The frame format for a command/response is:
STX (1 byte)
Length (1 byte) OC (2 bytes) Payload (n bytes)
CC (1 byte)
field
size
description
remarks
STX
1 byte
Start of text, value is 02Hex
Used to identify start of command
Length
1 byte
Length of frame
Number of bytes in frame including STX
and Checksum
OC
2 bytes
OpCode
Identifies the OpCode type
Payload
n bytes
Data field (n bytes)
Data in command or response
CC
1 byte
Checksum
Ones complement of the low byte of
the sum of all bytes excluding CC
Time-out:
•
All bytes must be sent with a maximum delay of 30 ms between the bytes.
•
When the delay exceeds 30 ms, a communication error response will be sent.
