ML-x17 DATA LOGGER MANUAL
Manufacturers of low power instruments
page 64
See chapter: “Compacted Data Format” for a description of the “Compacted” SBD message format.
When using ydocInsights you should ask your Iridium provider to use IPDirect and pass SBD messages
to the same IP-address/domain and TCP-port as used for 2G/3G/4G TCP-output from common YDOC
data loggers.
4.20.3.2
Settings menu
4.20.3.3
Send interval
The send interval on which the data is send by satellite communication. Beware that satellite
communication is rather expensive, so please choose a moderate Send interval and consider the use of
the aggregation features of the data logger (e.g. sample evert 5 minutes, but only record an hourly
average). In case satellite communication is used as backup, the send interval is determined by the
primary communication channel, but only when primary communication fails.
Note:
only parameters which are configured to output data to Satellite will be included in an SBD
message.
4.20.3.4
Data transpond
As satellite communication is rather expensive you can choose to send only the last sampled values
instead of logged values. When choosing to transpond logged values be aware to select a moderate log
interval to avoid high communication costs.
4.20.3.5
Backup mode
When the ‘Backup’ mode is selected satellite communication will be performed only if data transfer by
TCP, FTP, e-Mail or HTTP thru the cellular network is failing. You can also specify the number of cellular
transmission failures before satellite transfer takes place. When you set failures to 3 data transfer by
satellite will be performed every third cellular data transmission failure.
4.20.3.6
Message format
The SBD messages can be transmitted in readable ASCII or in a compacted binary format. The
compacted binary format is about 20 to 80% more efficient saving a lot of communication costs, but
needs specific processing to be able to interpret the message (The ydocInsights data collector is
provisioned with the algorithms to interpret the message).
See chapter “Compacted Data Format” for a description of this format.
The compacted format is limited to contain up to 15 logger parameters/channels. As textual parameter
codes would use to much data, the identification of the individual channels is based on a number between
1 and 15. Assigning the numbers to individual parameters is a matter of configuration by starting their
code names with a capital P followed by a number between 1 and 15. The P will be stripped of, as well as
any trailing characters, so you could specify meaning full codes like: P1TMP or P02HUM or P15LEV.
Iridium Satellite settings
[0]
Exit
[1] Name >> Iridium Satellite
[2] Port settings >> RS232 8N1; 19200 Baud
[3] Module power switch >> Enabled; Warm up 00:00:20
[4] Send interval >> 01:00:00
[5] Send delay >> Not used
[6] Data transpond >> Actual values
[7] Backup mode >> Not used
[8] Message format >> Compacted
[R] Remove
