[SOLVED] SMS through SIM300 GSM modem using hyperterminal

[Santoshhh]

I bought a SIM300 GSM modem from SIMCOM ltd. I need to send an SMS from the MODEM (after being interfaced with my PC by USB2serial converter) to a number. I used hyperterminal. I also used the following AT commands.
I typed "AT" in the main window. A response "OK" was returned from the GSM modem.
I then typed "AT+CPIN?" in the main window. The response was "+CPIN: READY".
Then I typed "AT+CMGF=1". A response "OK" was returned.
I then typed AT+CMGS="009779849623395". A response ">" was returned. Then I typed my message, after that I pressed Cltr+Z to send the message.
A response "+CMGS:251 OK" was returned.
I was supposed to get an SMS in the above number but I was disappointed. This happened for 5 times. I checked for balance on my phone putting the same SIM card. The nominal balance in the SIM card was deducted for sending the SMS but I didnt get one.
What may be the reason? If you are aware about it, please help.

 

[nandhu015]

Is 00 before the number necessary?

 

[Santoshhh]

'+' did not work. So, I put 0 and it worked. I mean SMS was sent but not received. The number should have been '09779849623395'. sorry for the mistake.

- - - Updated - - -

Is 00 before the number necessary?

The number should have been '09779849623395'. sorry for the mistake.

 

[avineshb006@gmail.com]

Hi

In my point of view use this following commands
1) AT+CSQ (for signal strength)
0,250
2) AT+CREG? (For sim registration)
0,1 = Local network
0,5 = Roaming Network
3) AT+CMGF =1 (For entering the text mode)
OK
4) AT+CMGS="phone number" (if its local no need of 0 and + initiation before the no)
> hello
>(CTL+Z)
ok

This will send the sms to the particular mobile no, or else try to check the gsm modem....

 

[ponnus]

Hai,
If your country code is 977, then try this also.
+9779849623395
or
09849623395

 

[Santoshhh]

Hi

In my point of view use this following commands
1) AT+CSQ (for signal strength)
0,250
2) AT+CREG? (For sim registration)
0,1 = Local network
0,5 = Roaming Network
3) AT+CMGF =1 (For entering the text mode)
OK
4) AT+CMGS="phone number" (if its local no need of 0 and + initiation before the no)
> hello
>(CTL+Z)
ok

This will send the sms to the particular mobile no, or else try to check the gsm modem....

It worked. Thank you so much.

- - - Updated - - -

Hi

In my point of view use this following commands
1) AT+CSQ (for signal strength)
0,250
2) AT+CREG? (For sim registration)
0,1 = Local network
0,5 = Roaming Network
3) AT+CMGF =1 (For entering the text mode)
OK
4) AT+CMGS="phone number" (if its local no need of 0 and + initiation before the no)
> hello
>(CTL+Z)
ok

This will send the sms to the particular mobile no, or else try to check the gsm modem....

It worked. Thank you so much.

 

[kunal123]

hi everyone,
how can i test my gsm module SIM300 on hyperterminal, how can i display message on serial terminal or lcd, received by gsm module, can i add add multiple sender number & also identify his number, please help me.

thanks

 

[kunal123]

hi avinesh,
i tried ur similar steps on hyperterminal i able to send message, but i tried same steps in controller programe, unable to send message, can u help me please

thanks

 

[nandhu015]

hi avinesh,
i tried ur similar steps on hyperterminal i able to send message, but i tried same steps in controller programe, unable to send message, can u help me please

thanks

Post your code to find out the problem

 

[avineshb006@gmail.com]

Hi Kunal

Post your code and schematic diagram, and what are u trying to implement jus explain it clearly..

 

[kunal123]

hi,
this is my arduino code to send message using sim300

void setup()
{
delay(5000); // give the GSM module time to initialise, locate network etc.
// this delay time varies. Use example 26.1 sketch to measure the amount of time from board reset to SIND: 4, then add five seconds just in case
Serial.print("SIM300 gsm module testing \n");

/* Serial.print("AT");
Serial.print('\n');
Serial.print(Serial.read());
Serial.print('\n');
Serial.print('\n');*/

// delay(1000);
Serial.print("AT+CSQ");
Serial.println(13,HEX);
Serial.println(10,HEX);
Serial.print(Serial.read());
Serial.print('\n');
Serial.print('\n');

Serial.print("AT+CREG=?");
Serial.println(13,HEX);
Serial.println(10,HEX);
Serial.print(Serial.read());
Serial.print('\n');
Serial.print('\n');
}

void loop()
{
Serial.print("AT+CMGF=1");
Serial.println(13,HEX);
Serial.println(10,HEX);
Serial.print(Serial.read());
Serial.print('\n');
Serial.print('\n');

// delay(1000);
Serial.print("AT+CMGS=+917738995895");
Serial.println(13,HEX);
Serial.println(10,HEX);
Serial.print("HELLO");
Serial.println(26,HEX);
delay(2000);
Serial.print(Serial.read());
}

thanks

 

[ponnus]

Hai,
Are you able to read response from modem? Or do you have problem only in sending message? After sending
AT+CMGS=+917738995895
wait for prompt and then send your message.