R help - Apr 2016 - Solution to communicating with UDP and other interfaces (under Linux) using R

I'd spent hours with Google trying to find how to control a separate 
software package from R via a UDP interface (I could run the package 
under a "system" command, but that was too slow).  I finally figured
out
a way to communicate with UDP through R, and it works fine (using the 
"system" command) - it's also fast.

(1) install software "socat" (available on most of the Linux 
repositories).  It's potent software for communication stuff, btw.

(2) set up the UDP 'port' to communicate with (like in a separate 
software package for passing commands and responses back and forth).

(3) use the "system" command to send messages - as an example:
system("echo \"quit\"| socat - UDP4-DATAGRAM:0.0.0.0:19004")

I haven't tried receiving data from that software yet... but according 
to the writeup on socat, it should be no problem.
You can also use the socat software to redirect from one type of 
connection to another.

(I'm studying R - both for programming/running 'real world'
interfaces
and then doing the statistics on the data.)

Hope this helps someone - the (tiny) few messages I've found indicated 
that it couldn't be done (they were old).  It can be done and rather simply.

Bob

Hey Bob,

If you're interested, I'd be glad to see what I can do to make doing
UDP comms from R accessible across platforms without the need for a
`system()` call. Mind shooting me a private e-mail to see what your
needs are so I can try to generalize a solution from them?

-Bob

On Sat, Apr 9, 2016 at 12:11 PM, Robert D. Bowers <n4fbz at
tampabay.rr.com> wrote:
> I'd spent hours with Google trying to find how to control a separate
> software package from R via a UDP interface (I could run the package under
a
> "system" command, but that was too slow).  I finally figured out
a way to
> communicate with UDP through R, and it works fine (using the
"system"
> command) - it's also fast.
>
> (1) install software "socat" (available on most of the Linux
repositories).
> It's potent software for communication stuff, btw.
>
> (2) set up the UDP 'port' to communicate with (like in a separate
software
> package for passing commands and responses back and forth).
>
> (3) use the "system" command to send messages - as an example:
> system("echo \"quit\"| socat -
UDP4-DATAGRAM:0.0.0.0:19004")
>
> I haven't tried receiving data from that software yet... but according
to
> the writeup on socat, it should be no problem.
> You can also use the socat software to redirect from one type of connection
> to another.
>
> (I'm studying R - both for programming/running 'real world'
interfaces and
> then doing the statistics on the data.)
>
> Hope this helps someone - the (tiny) few messages I've found indicated
that
> it couldn't be done (they were old).  It can be done and rather simply.
>
> Bob
>
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