[51] Problem in sending SMS through GSM module using 8051

ud23 said:

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Code C - [expand]
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void gsm_send(unsigned char *ch3)
{
data_send(ch);
//data_res();
delay(100);
data_send(ch1);
delay(100);
//data_res();
data_send(ch2);
delay(100);
//data_res();
data_send(a);
data_send(ch9);
data_send(a);
data_send("\r\n");
delay(100);
data_send(ch3);
delay(100);
SBUF=0x1a;
while(TI==0);
TI=0;
}

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sorry try with this edited function.use your delay function in above code.

Click to expand...

thats what i am confused about.. now i will try
btw.. why u add that data res() ? what is its objective?

data_res() is the data receive function. which is not needed by you you want just send sms as of now.

ud23 said:

data_res() is the data receive function. which is not needed by you you want just send sms as of now.

Click to expand...

i followed your code and edited it as u suggested. once it worked but now it won't, please check if it working or not

you can also do like above can edit code like you want.

what do you mean by once it worked and now it won't?

you are sending the sms just once so every time you power on the device it will send a single sms?

make sure your sim card have enough balance to send a more sms.