Question

AT Command for sending email

Asked by: Peter73

Hi all,
I have tried to send a SMS from my GSM modem with my own application. I have tried the following:

AT+CSCA=+44....[sent]        //modem respones ok
AT+CMGF=1[sent]                //modem responses ok
AT+CMGS=+4479....[sent]   //modem responses >
testtextstrg-Z [sent]           //modem is doing something for 10-15 seconds before respond's error

What do I do wrong?

Peter

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Asked On
2003-08-21 at 04:12:54ID20716010
Tags

gsm

,

sending

Topic

Global System for Mobile Communications (GSM)

Participating Experts
3
Points
50
Comments
9

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Answers

 

by: _nn_Posted on 2003-08-21 at 06:29:01ID: 9195335

Could be a number of things : PIN not entered, signal too weak and mobile not registered in a network, etc.
- what model/brand is it ?
- do you mind showing us your source code ? It will be easier to diagnose.

 

by: MeffPosted on 2003-08-21 at 08:06:03ID: 9196051

Why to send an email by SMS if it is cheaper by email?
On http://www.gsm-modem.de/smtp-gprs.html is sample code to send an emal with a GPRS module that comes with integrated TCP/IP stack.
Example to send an email to JOHN SMITH by  following AT commands:
AT+CGDCONT = 1,"IP","internet.gprs","0.0.0.0",0,0<cr> (1-GPRS context setting)
AT#USERID = "Happy User"<cr> (2-Authentication setting)
AT#PASSW = "EASY GPRS"<cr> (2-Authentication setting)
AT#SKTSET= 0,25,"smtp.gsm-modem.de"<cr>(3-remote host setting)
For our convenience we store all these parameters with the command:
AT#SKTSAV
Now we can activate the GPRS connection and let the JOHN SMITH module contact the server:
AT#SKTOP<cr>
When we receive the CONNECT indication, then we are exchanging data with the SMTP server program on the remote host machine.Now following the SMTP protocol we proceed with the HELLO presentation and mail delivery directly over the serial line (in green the data sent by us, in violet the one received from host):
220 smtp.gsm-modem.de ESMTP ; Thu, 5 Jun 2003 14:45:11 +0200
HELLO gsm-modem.de<cr><lf>
250 smtp.gsm-modem.de Hello [111.111.111.127], pleased to meet you
MAIL FROM: "JOHN SMITH"<John.Smith@gsm-modem.de><cr><lf>
250 2.1.0 "JOHN SMITH"<John.Smith@gsm-modem.de>... Sender ok
RCPT TO: "Receiver"<receiver@gsm-modem.de><cr><lf>
250 2.1.5 " John.Smith@gsm-modem.de "... Recipient ok
DATA<cr><lf>
354 Enter mail, end with "." on a line by itself
From: "JOHN SMITH"<John.Smith@gsm-modem.de><cr><lf>
To: "Receiver"<receiver@gsm-modem.de><cr><lf>
Subject: Email Test<cr><lf>
This message is sent for testing Easy GPRS feature. Hello World!<cr><lf>
.<cr><lf>
250 2.0.0 h55CjBVI020859 Message accepted for delivery



 

by: Peter73Posted on 2003-08-22 at 03:43:34ID: 9202073

Thanks for the email example. It is great.
But I need to send a SMS. There is nothing wrong with my GSM modem, PIN and weak signal are ok. I can do a phone and data call from the modem. There is just something wrong with my AT code. I am using a Siemens MC35.
Peter

 

by: _nn_Posted on 2003-08-22 at 03:56:53ID: 9202126

Last thing that comes to mind :

>> AT+CSCA=+44....[sent]        

Are you positive the number is correct ?

 

by: _nn_Posted on 2003-08-22 at 04:00:12ID: 9202142

I doubt it will change a thing, but enclosing telephone numbers with double-quotes (") is possibly a good thing. I've had once an exotic GSM modem which was sensitive to such kind of things.

 

by: _nn_Posted on 2003-08-22 at 04:02:41ID: 9202152

Last, you show us some kind of log of a session, but that doesn't mean your modem is seeing the same thing. Could you please paste your source code ? It would definitely help diagnosing...

 

by: MeffPosted on 2003-08-22 at 04:40:14ID: 9202311

Please put your SIM card do your mobile. If you then cannot send a SMS then you have chosen a wrong SMSC number.
Example: Send SMS from http://www.gsm-modem.de/gsm-modem-faq.html

AT+CMGF=1[Enter]
AT+CMGS="+491711234567"[Enter]
>Please call office^Z
 +CMGF=1 - set modem in text mode
Send SMS (^Z equals StrgZ). At Vodafone Germany, you can send without international and local code. If you dial with Int. and local code the transmission from foreign networks are ensured.

Frequently done mistake is that you have to use "^Z" . Then you get a prompt. Then you type "Hello world" and then you type "[Enter]. I assume that is you mistake. Please show the full AT strings. Without I cannot see your mistake. BTW, if you switch on the enhanced error codes, then you get an error code. Please switch it on.


 

 

by: raul_morenoPosted on 2003-09-04 at 02:21:00ID: 9286341

If you want to send sms to an email you have to use the PDU Mode AT+CMGF=0,
and then use the standard encoding method
to encode you message in PDU (you have to make a special PDU to send sms to email).

R.

20120131-EE-VQP-002

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