From: William Pretty Security <[email protected]> Reply-To: <[email protected]> Date: Friday, June 6, 2014 at 6:01 PM To: <[email protected]> Subject: RE: [beagleboard] Re: Reading an Analog input from a web page ?
> Hi Mark; > > Thanks for the response. I looked at the links, and I think it would be easier > if provided more detail. > What I am trying to do is a lot less complex (I think) than your examples. > > As part of my latest book for Packt Publishing, I have an RF Power Meter > design. > Basically you read an analog voltage which is proportional to the RF power > being measured. > (It could just as easily be temperature) multiply by a correction factor to > convert millivolts to dBm and then > print out the result. > > I already have test software that does this to the console, but I want to now > output it to a web page. > The web page already controls a programmable attenuator, using socket.io and > toggling IO bits. > I don¹t need to graph anything; just print a number on the web page that > corresponds to the RF power. > > I found a couple of files in your git tree called ³ioPlot.html² and > ³ioPlot.js² > but I am not sure how to simplify them for my application. Why not use DojoToolkit and Node.js? I suggest you use websockets which is easy to implement in a Node.js web server and also in javascript on a web client. Regards, John > > Thanks; > > Bill > > http://www.packtpub.com/building-a-home-security-system-with-beaglebone/book > > > From: [email protected] [mailto:[email protected]] On > Behalf Of Mark A. Yoder > Sent: Friday, June 06, 2014 4:51 PM > To: [email protected] > Subject: [beagleboard] Re: Reading an Analog input from a web page ? > > > p.s. I also have a homework[1] assignment that gives an overview of it. > > > > --Mark > > > > [1] https://drive.google.com/#folders/0B5UNMAgIJB74cUhIRlRwcXdQaTQ > > On Friday, June 6, 2014 3:44:36 PM UTC-5, Mark A. Yoder wrote: > > William: > > I have an example[1] that not only reads analog in, but it also plots it on > a web page. > > > > --Mark > > > > [1] https://github.com/MarkAYoder/BeagleBoard-exercises/tree/master/realtime > > On Thursday, June 5, 2014 11:09:58 AM UTC-5, William Pretty Security wrote: > > Hello group; > > I am wondering if is possible to read an analog input on the BBB at the press > of a button on a web page. > I already have code that uses node.js and socket.io <http://socket.io> to > turn on an LED in response to a button push. > But I want to Read an input and display the result. > > Does anyone know how to do this ?? > > Thanks J > > http://www.packtpub.com/building-a-home-security-system-with-beaglebone/book > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > > > No virus found in this message. > Checked by AVG - www.avg.com <http://www.avg.com> > Version: 2014.0.4592 / Virus Database: 3955/7631 - Release Date: 06/06/14 > > > No virus found in this message. > Checked by AVG - www.avg.com <http://www.avg.com> > Version: 2014.0.4592 / Virus Database: 3950/7548 - Release Date: 05/23/14 > Internal Virus Database is out of date. > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
