Sutron Corporation Satlink Operations & Maintenance Manual, Rev 8.04.2 11/3/2016 pg. 148
Range of transmitted data is 0 to 9999 (numbers out of range are transmitted as 0000 or
9999). This means that the sensor data should be between 0 and 99.99 before
formatting.
If the user elects to append battery voltage, one of the two will be appended:
If the transmission satellite is Japan GMS or EUMETSAT, only one line of battery voltage
information will be added. It will take this format: “13.5<CR><LF>” Three digits and a
decimal point are always used. It is the battery voltage prior to the transmission.
For all other transmission types, two lines of battery voltage information will be added.
Both lines take the same format: “12.5<CR><LF>” (three digits of battery voltage and a
decimal point). The first line is the battery voltage prior to this transmission. The second
line is the battery voltage during the last transmission.
This is an example transmission:
010570F2 108183053
0250 0250 0250 0250
2231 2232 2233 2234
12.2
12.1
On the first line 010570F2 represents the hexadecimal satellite ID. 108 is the Julian Day
(for the year 2005, that is April 18th). 183053 means 18 hours 30 minutes and 53
seconds.
The second line (0250 0250 0250 0250) shows four readings of the first sensor. This
measurement had four same readings. Before formatting, that reading was 2.50. It was
multiplied by 100 and padded with a leading zero.
The third line (2231 2232 2233 2234) shows four different readings of the second
sensor. That sensor’s readings were originally 22.31, 22.32, 22.33, and 22.34
respectively. They were multiplied by 100 and padded with a leading zero.
The fourth line (12.2) is the battery reading in Volts prior to transmission.
The last line (12.1) is the battery reading in Volts during the last transmission.
15.10.
TCP/IP Session
A Satlink equipped with a cell modem will use scheduled transmissions periodically connect to a
server and deliver sensor data. See the
and
details
.
Relevant settings include
Main Server, Backup Server, Server Port, and Server Password.
When Satlink connects to a server, some information is sent to the server before the sensor data
is delivered. This information is meant to help the server decide what to do with the sensor data
that is en route. The information includes details such as the sensor name and whether the
transmission is a result of an alarm event.
After the sensor data is delivered to the server, the server may log into Satlink and issue
commands to check status, change setup, download more data, or any other command line
activity.
