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sending SMS using GSM module & Microcontroller
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mangesh24
Sat Sep 24 2011, 06:19PM
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Joined: Sat Sep 24 2011, 05:59PM
Location (Home Town): london
Posts: 3
 Hi friends,
I am trying to send SMS using GSM modem, after i send destination mobile number I am receiving "\r\n> " as a response from modem , after i enter text to message, i terminated it with "0x1A" character, further i am getting response as "\r\n" from the modem but not \r\nOK\r\n. Can anyone tell me the possible error?
for what time i should wait for receiving the ok response?
Please help
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majoka
Sun Sep 25 2011, 08:17AM

Registered Member #22104
Joined: Thu Sep 10 2009, 03:04PM
Location (Home Town): Wah Cantt, Pakistan
Posts: 3900
 @ mangesh24
ru using sim300dz modem or any other
ru checking it on hyper terminal or doing with controller
if using controller post code
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mangesh24
Mon Sep 26 2011, 05:13PM
Registered Member #35678
Joined: Sat Sep 24 2011, 05:59PM
Location (Home Town): london
Posts: 3
 @majoka, Thanks for the reply.
While debugging this problem, i found one another problem with getting connected to wireless network,
If i send the AT+CRQ command to ask signal strength, i got the response as "error: operation not allowed", currently i am trying to solve this issue, also i get CREG response as 0,0 so might be i need to do more for establishing the connection with GSM network(The setting is Auto connect by-default).
Please help me more on this.
Thanks for the reply.
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mangesh24
Mon Sep 26 2011, 05:16PM
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Joined: Sat Sep 24 2011, 05:59PM
Location (Home Town): london
Posts: 3
 @majoka,
Sorry,forgot to answer your questions,
I am using Sierra wireless GSM modem SL8082 family with micro-controller.
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kirangowle
Tue Sep 27 2011, 05:53AM

Registered Member #26972
Joined: Thu Mar 18 2010, 09:18AM
Location (Home Town): Bangalore, Karnataka
Posts: 587
mangesh24 wrote ...

@majoka,
Sorry,forgot to answer your questions,
I am using Sierra wireless GSM modem SL8082 family with micro-controller.


All GSM modems are wireless.
Do you have datasheet/brochure of SL8082. i am not finding it.
Before connecting to controller did you checked response on hyper terminal?
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majoka
Tue Sep 27 2011, 06:44AM

Registered Member #22104
Joined: Thu Sep 10 2009, 03:04PM
Location (Home Town): Wah Cantt, Pakistan
Posts: 3900
 when u type CREG
it should reply as
http://www.shapeshifter.se/2008/04/30/list-of-at-commands/
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dspicmicro
Wed Sep 28 2011, 05:10AM

Registered Member #34009
Joined: Thu May 12 2011, 08:33AM
Location (Home Town): maran
Posts: 45
 hello sir;
sir i have completed receiving SMS through GSM module(sim300) .now i want to send SMS to any other mobile from my GSM module .plz help me in the sense at command to send sms (any data) to any other mobile.


Thankyou!
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kirangowle
Wed Sep 28 2011, 05:23AM

Registered Member #26972
Joined: Thu Mar 18 2010, 09:18AM
Location (Home Town): Bangalore, Karnataka
Posts: 587
 Hi,
Which controller are you using?
Test this in your hyper terminal first.
AT+CMGS="9845XXXXX"(ENTER)
>Type your msg here and press ctrl+z to send the msg.

The same thing you implement in your design.
Share your code for more understanding.
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majoka
Wed Sep 28 2011, 07:48AM

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Joined: Thu Sep 10 2009, 03:04PM
Location (Home Town): Wah Cantt, Pakistan
Posts: 3900
 @ dspicmicro
follow kiran suggestion
also same logic is in controller as well as on hyper terminal
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bbld
Wed Dec 14 2011, 10:00PM
Registered Member #36597
Joined: Wed Dec 14 2011, 09:42PM
Location (Home Town): vietnam
Posts: 7
 try this code,hope it helps
void send_sms(char phonE[15],char *m)
{

fprintf(SIM300,"AT+CMGS=");
putc(34);//char "

fprintf(SIM300,phonE);
putc(34);//char "

putc(13);//enter CR
delay_ms(1000);//waiting for char ">"
fprintf(SIM300,m);
delay_ms(1000);
putc(26);//CTRL+Z => start send message

}
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