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Real Time Import/Export

Greensea Workspace allows for real time import of NMEA messages from external applications or export of NMEA messages to external applications. This is handled by a set of helper programs:

gss_nmea2gss - Real time import of NMEA messages from other applications to Greensea Workspace.
gss_gss2nmea - Real time export of NMEA messages from Greensea Workspace to other applications..

These programs are installed as part of Greensea Workspace. Greensea Workspace uses the helper programs to receive or publish information to or from its channels. More information about Greensea Workspace's channels can be found in the Channel/Data Lists page.

The general procedure is as follows.

More information will be provided about setting up specific importing and exporting requirements on the following pages:

Determine the capabilities of the other application, including messages available or permitted, communications protocols and ports available.
Make all physical connections for the ROV and other application's device requirements (if necessary).
Open a terminal window and enter the gss_* command (where * = either "nmea2gss" or "gss2nmea") and associated parameters (as appropriate for the other application).
Start Greensea Workspace and the other application. (the order of starting will generally not matter, but in some cases it might - this will depend on the other application's requirements, including time-out settings, etc.)
Verify import or export is operational.

You can create a shell script (.sh) and desktop shortcut for the gss_* command to make it easier to start the helper program.

You can customize the Greensea Workspace configuration to include the shell script when Greensea Workspace is started.

You can use the Greensea Workspace Process View to enable or disable import / export processes allowing you to alternate between configurations.

Some applications may require setting up a virtual port to enable communications between Greensea Workspace and another application, depending on the protocols supported by that application. See Device Integration section in the appendices.