Le 07/08/2012 17:56, Chris Albertson a écrit :
On Tue, Aug 7, 2012 at 6:45 AM, Jim Lux <[email protected]> wrote:
On 8/6/12 10:43 AM, Chris Albertson wrote:
On Mon, Aug 6, 2012 at 8:34 AM, Jim Lux <[email protected]> wrote:
what would be useful is to have some sort of "plotting engine" that is a
canned webpage (or stored locally on the user/client computer) that can
ingest fairly raw data from a URL..
<snipped>
So the web server is inside an Arduino? Yes can't run GNUplot there. Why
not have the Arduino produce either Postscript or PDF? It is very easy to
draw a graph in Postscript.
<snipped>
Also everyone already has the display engine. PDF is very much like
Postscript. but I think Postscrip in "EPS" form is easy to create inside an
Arduino,
One good reason for doing as little as possible in a micro-controller is
that they are often used to collect raw data with as little latency as
possible. Doing web serving on a single slowish core in that case is not
a good idea. I have a bunch of Soekris doing data collection and if I
start to do compute intensive tasks on one, it skews the timing, so I
use a completely independent one to do the web serving, with the data
collectors providing access to data via nfs which does not seen to
impact the timing much even though I can't guarantee that requests are
satisfied in otherwise idle time . I like the idea of client side
graphing. It probably exists already somewhere though I haven't checked
details - RGraph pops up with google.
--
Les chiens aboient, et la caravane passe.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
