N to 1 to M SMS based telemetry

We have N number of sensors in GSM and GPRS covered area.
We want from these sensor to send their measurements on pre-defined times to 
a centre for data collection.
Sensor data length around 80bytes and each sensor as 4 byte long unique 
identification number.
Sensors are build around AVR or PIC based controllers
Time to time center (a PC) may send commands to one or multiple sensors to 
change their measurement rate.

My question is what type of HW and SW components are there in the market for 
SMS based telemetry that we can use in above mentioned application.

Thank you.

Gustav 

Gustav Basso wrote:

> We have N number of sensors in GSM and GPRS covered area.
> We want from these sensor to send their measurements on pre-defined times to 
> a centre for data collection.
> Sensor data length around 80bytes and each sensor as 4 byte long unique 
> identification number.
> Sensors are build around AVR or PIC based controllers
> Time to time center (a PC) may send commands to one or multiple sensors to 
> change their measurement rate.
> 
> My question is what type of HW and SW components are there in the market for 
> SMS based telemetry that we can use in above mentioned application.

There are complete industrial phones, equipped
with a serial interface and an AT commandset
identical to the modems years ago.

The rest is a few lines of code, both on a Windows
PC and on some PIC/AVR firmware.

Rene
-- 
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
& commercial newsgroups - http://www.talkto.net

While working for Vodafone I had a great deal of success with these chaps.
Great products, excellent support.

http://www.falcom.de/


"Gustav Basso" <gustavbasso@warmmail.com> wrote in message
news:42e0a690$0$7352$afc38c87@news.optusnet.com.au...
> We have N number of sensors in GSM and GPRS covered area.
> We want from these sensor to send their measurements on pre-defined times
to
> a centre for data collection.
> Sensor data length around 80bytes and each sensor as 4 byte long unique
> identification number.
> Sensors are build around AVR or PIC based controllers
> Time to time center (a PC) may send commands to one or multiple sensors to
> change their measurement rate.
>
> My question is what type of HW and SW components are there in the market
for
> SMS based telemetry that we can use in above mentioned application.
>
> Thank you.
>
> Gustav
>
>