Sutron Satlink 3 - Page 150

Sutron Corporation Satlink Operations & Maintenance Manual, Rev 8.04.2 11/3/2016 pg. 150
them to be stitched together easily. The extended packet types include a comma-delimited sub-
header to describe the subset of data being sent. The first sub-header differs from all subsequent
sub-headers, in that it includes the total size of the data being sent.
The telemetry header may contain the station name if the setting Tx Station Name is enabled.
Please read below for more details.
15.11.1. Packet Structure
Packets are composed of
o packet-type
o sub-header
o data
The packet-type is a single byte:
Hex Value
ASCII
Description
0x30
0
Self-timed
0x31
1
Self-timed extended
0x32
2
Entering alarm
0x33
3
Entering alarm extended
0x34
4
Exiting alarm
0x35
5
Exiting alarm extended
0x36
6
Command response
0x37
7
Command response extended
0x38
8
Forced transmission
0x39
9
Forced transmission extended
...
Reserved for future use
0x7D
}
User defined
0x7E
~
Look to next byte for meaning
0xFF
Binary data, reserved for future use
The sub-header has the following comma delimited fields:
o ,id,start-byte,total-bytes,station-name:
packet-type
Numeric ASCII character defining packet type. See type definitions
in table, below
id
Numeric ASCII text defining the message id. Starts at 0. Rolls over
after 99.
total-bytes
Numeric ASCII text defining the total number of data bytes to be
sent (data only, does not include overhead bytes)
start-byte
Numeric ASCII text defining which byte of total-bytes is the start
byte of the current packet. Starts at 0.
station-name
Optional ASCII field that has station name. Formatted as
,N=STATION NAME