On Wed, 01 Dec 2004 15:31:39 +0000, Liam Bedford <lbedford at lbedford.org> wrote:
> On Wed, 2004-12-01 at 15:23 +0000, Dale Dunlea wrote:
> > Hi All,
> >
> > I need to set up a system cabable of sending and receiving SMS. It can
> > already send them via a web form on a dedicated SMS website. But the
> > ability to receive SMS is a new one. I presume there are phones out
> > there which will plug easily into a serial port and let you interrogate
> > them for received text messages. Does anyone know of any off the top of
> > their head? The cheaper the better. It doesn't need any fancy features
> > as it will be sitting next to a server for all it's useful life.
> >
> That will probably destroy the battery (charging/discharging etc).
Maybe have a look for something suitable with a wrecked battery and
leave it plugged in all the time. The following webpage may be
useful:
http://www.riccibitti.com/tinyplanet/tiny_article.htm
The author interfaces an old Ericsson T10 to a tiny atmel
microcontroller using the microcontroller's serial port. His
software's written in assembly, but with the luxury of a full blown
computer you could put something similar together pretty quickly.
Don't know how well other phones would do in this application, but it
would appear from the above page that there's some semblance of a
standard with regard to the interface used, so it's very likely other
models could be pressed into service in a similar way with more or
less effort.
His setup involves the controller querying the phone periodicially to
see if a new message has been received. If one has arrived, it is
compared with a list of standard messages to see what action should be
taken. To provide feedback, the system will send one of two
pre-prepared reply messages indicating the state of a switch.
If you want to provide full featured communications (i.e. send/receive
SMSs for people not machines) you'll either want to extend his
application or try something more full-featured.
Michael
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