[time-nuts] beaglebones, time, web services

[Chris Albertson]

Yes cgi scripts take a few hours to learn and take only a small processor.
Drubbing a dims and all is overkill and will not perform well on the BBB.


On Monday, July 6, 2015, Tom Harris <celephicus at gmail.com> wrote:

> Since you want simple just use a CGI script written in your language of
> choice. Very easy technology to learn, Python has support libraries out of
> the box if you want. You have a webpge with carious simple controls on it
> like buttons etc, you click a special button that posts a request to a URL,
> the webserver runs a script that generates the response, the webserver
> serves it out, your browser displays it. Why bother with learning a
> framework? Messing about with mechanics is far more fun!
>
>
> Tom Harris <celephicus at gmail.com <javascript:;>>
>
> On 4 July 2015 at 23:13, Jim Lux <jimlux at earthlink.net <javascript:;>>
> wrote:
>
> > I've got a project I'm working on to make a sophisticated sundial with
> > moving mirrors.  I've got a batch of Arduinos that move the mirrors to
> the
> > appropriate places, given the current sun angle, etc.
> >
> > I've got a beaglebone that runs some python code to calculate sun angle
> > based on time
> >
> > The beaglebone will have a GPS feeding it to get time.
> >
> > BUT now, I'd like to add a web interface, so that it can be manipulated
> by
> > a mobile device using a browser.
> >
> > One way I can think of is to run some sort of limited web server. there
> > are a couple that come with the beaglebone, including the python
> > "simplehttpserver".
> >
> > But I'm sort of stuck on the interface between the webserver and the
> other
> > code running.
> >
> > I've done this kind of thing where the one task goes out and updates
> files
> > in the tree that's being served by the web server, and that works fine
> for
> > "status display" kinds of things that don't update very quickly. It's
> also
> > nicely partitioned.
> >
> > but I want to be able to change the behavior of the system (e.g. by
> having
> > the server respond to a PUT or something)
> >
> > Is the best scheme to go in and modify the webserver code to look for
> > specific URLs requested, and then fire off some custom code to do what I
> > want?
> >
> > I'm not particularly interested in javascript, and would prefer python.
> >
> >
> > Or are there libraries that make this more cookbook? (the little "getting
> > started with beaglebone" book talks about flask)
> >
> > There's quite a few websites out there where someone has done some sort
> of
> > "home automation", but they tend to be a bit light on the analysis of
> pros
> > and cons of implementation architectures: "I built X using Y and Z and it
> > sort of works".
> >
> >
> > Actually, along a similar line.. my "solar position" code isn't very
> > pretty (it's sort of replicating some code I wrote in Basic a long time
> > ago, with some changes from stuff I cribbed from ccmatlab).  If someone
> > knows of a python package that just "does this", I'd love to hear about
> > it.  Either Az El, or X,Y,Z in ECI or ECF would do.
> >
> >
> >
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-- 

Chris Albertson
Redondo Beach, California