Re: Communicate via SMS\voice call on a cellphone with a microcontroller

[BORBELY Zoltan]

Hi,

On Wed, Mar 19, 2003 at 11:08:40AM +0200, Heinrich Raman wrote:
> What components do one use to go about for the above design.I would like to
> use a Nokia phone (61 or 30 series) to do the above interfacing.Is it
> possible that you can tell me where I can get the AT commands for the Nokia
> phones.

The older phones (e.g. 5110/6110/3210/3310) doesn't support AT command set.
You can use M2BUS or FBUS commands, but this is much harder. You can look
into gnokii (source and documentation) for details. gnokiid is a modem
emulator for these phones.

Modern phones (e.g. 7110/6210/6310) contain a built-in modem so you can
use AT commands there.

> I would like if you can inform me on the specifications and protocol to use
> to communicate or control via Short Message Service(SMS) on the cellular
> phone with a microcontroller.

I sent a CC to the mailing list. There are some people who attached his
phone to a microcontroller. You can look into the mailing list archives
for details.

> I would like to control I/O via a cellphone (e.g. switch LEDs or relays via
> SMS with my cellphone).
> 
> Because phone company usually treat SMS packets as VERY VERY LOW PRIORITY. 
> In the worst case, the message may take more than 24 hours to arrive. For
> the best performance, I would like to make a normal voice call and
> use DTMF to encode your messages.
> 
> Is it possible that you can give me information on the above

Maybe some phone driver supports it (probably the nk6100). Compile gnokii
and make some experiment.

Bye,
Bozo