[time-nuts] Lady Heather without a PC

Mon Aug 19 13:59:09 EDT 2013

You might say that if you need to monitor the performance of the
Thunderbolt at all, maybe "get a life".   The little boxes work just as
well when you are not looking.   But assuming we all are anti-social geeks
who like to look at ADEV plots and the like and worry if our equipment is
to close to a HVAC duct then if you are building software to make those
plots for us geeks, make sure it displays the plot on the device such geeks
are likely to have, that would be a web browser running on a Smart Phone
iPad or notebook.

Cell phones and tablets are how most people today access the internet.
 (yes we've crossed over if you cost unit sales.) If you build a web server
today that can't serve those devices you loose most of the potential
customers.  It is not hard to do. The simplest thing is just use plain old
HTML and let the device format the page how it likes.  Next simplest is to
look at the device and build the page accordingly but that precludes simple
static html pages.

SNMP or what ever, just so long as no one sends GIF images one per second.
 You should send DATA that is rendered on the display device.

Yes, SNMP is complex to implement, but no one needs to do that, just use an
existing implementation net-snmp <http://net-snmp.sourceforge.net> It's
free.   Kind of the same with seb servers, no one would implement one
themselves, Apache is free.

On Mon, Aug 19, 2013 at 9:55 AM, Didier Juges <shalimr9 at gmail.com> wrote:

> I have been looking at SNMP intensively for the last 2 weeks. I came to
> appreciate the warning I saw on one of the first documents I read about it:
> the protocol is simple although the implementation is not :) While I am
> sure you can run a useful subset of SNMP on a small machine, there are much
> simpler protocols to use for something like that. I like the web browser
> client with javascript and Ajax if you need it because every device
> nowadays can run it, and every device is powerful enough to do a decent job
> with it.
> Now, if you feel that you absolutely need to monitor your Thunderbolt with
> your cell phone, I suggest you get a life :)
> My suggestion was mainly based on using a laptop or other "computer", just
> like LadyHeather does not.
>
>
> On Mon, Aug 19, 2013 at 10:39 AM, Chris Albertson <
> albertson.chris at gmail.com
> > wrote:
>
> > Sending GIF images is not a good idea for several reasons
> > 1) If the display updates once per second, you'd need to send an entire
> GIF
> > image every second,
> > 2) What if the user has a very small screen, like a cell phone, or he
> has a
> > large screen?  The GIF will either be the wrong size or you need a way to
> > tell the server what size image to make
> > 3) How to zoom and change the image scale?  Again all  the heavy lifting
> > must be dome on the server side
> >
> > THis is backwards.  I'd like the monitor to run on very LOW-END hardware,
> > like a PIC, AVR chip or whatever and hopefully without  even the need to
> > boot an OS.
> >
> > One way to move data from a monior to a display is SNMP
> > http://en.wikipedia.org/wiki/Simple_Network_Management_Protocol
> > This can be implemented with a very light weight process and not very
> much
> > data moves over the network.   Also display programs that run on the
> > desktop computer already exist.   It is easy to query and plot SNMP data.
> > So makethe Thunderbolt look like an SNMP device.
> >
> > SNMP implements commends that i effect say "get me the temperature data
> for
> > the last N hours." or "set this parameter to this value".   It is exactly
> > what is needed and we don't need to write the client side software.
>  Unless
> > you'd want a custom display.
> >
> > I think the monitor should be able to run on atiny uP, something that
> cost
> > $20 or so and use very little power, under 1W.
> >
> >
> > On Mon, Aug 19, 2013 at 4:30 AM, Didier Juges <shalimr9 at gmail.com>
> wrote:
> >
> > > I can imagine creating a screen image as a jpeg and making it available
> > > via the web server.
> > >
> > > I have done that before for something else (a headless device.)
> > >
> > > Didier KO4BB
> > >
> > > Chris Albertson <albertson.chris at gmail.com> wrote:
> > > >On Sun, Aug 18, 2013 at 10:11 PM, Eric Williams <wd6cmu at gmail.com>
> > > >wrote:
> > > >
> > > >> Would be nice if someone did a Linux port of LH that could run on a
> > > >> Raspberry Pi or something, then you could embed it into your T-Bolt
> > > >> installation.  Plug in a HDMI monitor if you want to look at it all
> > > >the
> > > >> time, or come in remotely via Ethernet.
> > > >
> > > >
> > > >No, the display capability  needs to be removed from the  the
> software.
> > > > A
> > > >ported LH would just put the data someplace.  A second program could
> > > >create
> > > >plots and it could run on a different computer.   Getting rid of the
> > > >display would make the porting go faster and no tie you to some
> > > >specific
> > > >platform.
> > > >
> > > >
> > > >
> > > >--
> > > >
> > > >Chris Albertson
> > > >Redondo Beach, California
> > > >_______________________________________________
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> > >
> > > --
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> other
> > > things.
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> >
> >
> >
> > --
> >
> > Chris Albertson
> > Redondo Beach, California
> > _______________________________________________
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-- 

Chris Albertson
Redondo Beach, California