[asterisk-users] phone as control interface(was99bottlesofbeer)

[marcotasto]

Hi Lenz.
What I did to interface asterisk with the door opener was to implement, in the board, a custom embedded server that receives and parses a set of UDP packets containing a known data in it. 
In the dialplan I then call a perl AGI script that sends UDP packets in the correct sequence and with proper contents inside.
I've implemented in this way to be able to open the door not only by calling an internal extension but even through a dedicated external "pushbutton" connected to a second board that sends the same UDP packet sequence when the pushbutton is pressed.

I did some other experiments trying to embed a very lite SIP layer (written from scratch to be the more embeddable as possible) and I was able to register to my Asterisk PBX and to answer to OPTION packets (sent by the PBX) to be qualified as a valid SIP channels... but it's today only an experiment because I never had time to terminate it. :-(
SIP is complex and to write a SIP compliant layer is a very time consuming stuff.

Another think that could be done is to use the already working HTTP server layer. Think about sending an HTTP GET or POST, again, with an external perl AGI script.

Thank you and bye.

Marco Signorini.


> ---------------------------- Original Message ----------------------------
> Subject: Re: [asterisk-users] phone as control interface(was99bottlesofbeer)
> From:    "Lenz" <lenz-ml at loway.it>
> Date:    Thu, October 18, 2007 1:15 pm
> To:      "Asterisk Users Mailing List - Non-Commercial Discussion"
> <asterisk-users at lists.digium.com>
> --------------------------------------------------------------------------
> 
> 
> Hello Marco,
> could you explain how you did the interfacing to the Asterisk PBX? does
> your prototype speak SIP to receive commands?
> Thanks
> l.
> 
> 
> 
> 
> On Thu, 18 Oct 2007 12:27:33 +0200, marcotasto <marcotasto at libero.it>
> wrote:
> 
> > Hi All,
> > sorry if I post again this e-mail but I think the first one was lost.
> >
> > I don't know if this is OT but I'm working in my spare time at  a small
> > hardware project that match to what's requested below.
> > It's a board with Input/Output capabilities and 10Mbps ethernet
> > interface. It has Microchip software TCP/IP stack on it.
> > Being at a very beginning stage, you can see a little preview (and
> > hopefully play with an online prototype) at this address:
> >
> > http://www.auto-matica.com/index.php?id=16
> >
> > I've used it in the past to open a garage door when calling a private
> > extension with Asterisk PBX and a little perl-AGI glue.
> >
> > I hope could interest to someone and I'm open to any
> > suggestion/collaborations.
> >
> > Thank you and bye,
> > Marco.
> >
> >
> > ----- Original Message -----
> > From: "John Faubion" <jfaubion at tx.rr.com>
> > To: "Asterisk Users Mailing List - Non-Commercial Discussion"
> > <asterisk-users at lists.digium.com>
> > Sent: Tuesday, October 16, 2007 9:46 AM
> > Subject: Re: [asterisk-users] phone as control interface(was99bottlesof
> > beer)
> >
> >
> >>> has anyone actually been satisfied with the performance of these
> >>> powerline signalling devices ?
> >>
> >> Universal Powerline Bus is a vast improvement over the original X10. I
> >> believe the X10 devices used a 4V signal during the zero crossing point
> >> of
> >> the AC voltage to transmit 1 bit. Needless to say this made X10 slow,
> >> susceptible to line noise and not very reliable. IIRC X10 is only 75%
> >> reliable. By contrast, UPB is 20-40 times faster, it uses a higher
> >> signaling
> >> voltage so line noise isn't a big factor any more and has the advantage
> >> of
> >> controlling 250 times more devices than X10. This will help to prevent
> >> stray
> >> signals from the neighbors controller from accidentally controlling your
> >> devices. UPB is supposed to be 99.9% reliable with a latency of less
> >> than
> >> 100 milliseconds. Granted that still leaves a tenth of a percent of
> >> uncertainly. However that is without resorting to filters, couplers and
> >> the
> >> like.
> >>
> >>> Granted in an existing situation there may not be a way to run more
> >>> wires, but I evaluated them a while back and decided to stay away.
> >>
> >> You may want to take another look at them. Just like Asterisk has made
> >> great
> >> strides since the release of 0.7, UPB has brought the quality level way
> >> up.
> >> Of course this higher quality also has a higher price.
> >>
> >> John
> >>
> >
> > Anyone on the list interested on working on a project where we can create
> > devices that work over Ethernet ?
> >
> >
> >
> >
> > _______________________________________________
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> >
> 
> 
> 
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