SBDCTL

The sbdctl application is an example application that can send and receive data on the IRIDIUM network. It requires an IRIDIUM 9602 modem and an appropriate account through a third-party satellite network provider. The source code example is located on the Technologic Systems public github here.

The sbdctl application uses multiple command line switches, and uses stdin/stdout where input or output are necessary:

root@ts7800-v2:~# sbdctl 
Usage: sbdctl [options] ...
Technologic Systems SBD Control Utility
Status output goes to stderr.  All other IO uses stdin/stdout.
Options are executed in the order given on the command line.
For example:
sbdctl -D <data_len_bytes> -c < myfile.bin
This would read myfile.bin into the MO buffer, then initiate an SBD session
(if possible) to transmit the data to the network.
NOTE:  Maximum input is 340 bytes for either text or binary transmissions.
NOTE2:  The MO and MT buffers can only contain one message each.

 -p, --port </dev/ttyEX1>  Define which serial port to use.
 -c, --connect             Connect to satellite and initiate SBD session.
 -t, --tread               Read text from SBD modem's receive buffer.
 -d, --dread               Read binary data from SBD modem's receive buffer.
 -T, --twrite <len>        Write <len> bytes text data from stdin to SBD modem's transmit buffer.
 -D, --dwrite <len>        Write <len> bytes binary data from stdin to SBD modem's tx buffer.
 -r, --rssi                Request new RSSI reading from SBD modem.
 -s, --status              Get local MO and MT message queue status.
 -e, --events              Enable unsolicited event reporting from modem.
 -i, --info                Dump modem-related info in BASH-compatible variables.
 -x, --indexes             Report message index number for MO and MT.
 -y, --clearindex          Clear Mobile Originated Message Sequence Number.
 -k, --clearbuffers        Clear both MO and MT buffers.
 -l, --clearmobuf          Clear Mobile Originated (MO) buffer.
 -m, --clearmtbuf          Clear Mobile Terminated (MT) buffer.
 -a, --cpymomtbuf          Copy MO to MT buffer on modem.
root@ts7800-v2:~#