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Cannot send sms from M95 Quectel GSM Module-PIC24F

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maheshece28

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Hi guys,
I'm trying to send a SMS from my Modem(PIC24FJ128GA202 interfaced with M95 Quectel GSM) to my mobile phone. I've successfully read received SMS from my mobile. But cannot send SMS from my modem. I thought that i'm doing something wrong while i give ctrl+z. I've tried appending "\r\n" with "0x1A" i.e. "0x1A\r\n" but its not working. Below is the send SMS code....

Code: 
uart3str("AT+CMGF=1\r");
Delayms(300);
uart1str(gprs_buffer);                    //gprs_buffer has response of AT commands (Response: "OK")
clear();                                         //Clear gprs_buffer 
uart3str("AT+CMGS=\"+91900xxxxxxx\"\r\n");     //+91 is the country code
Delayms(300);
uart3str("Hello");                          //Message i'm trying to send
uart3str("0x1A");                          // Ctrl+Z
uart3str("\r\n");
uart1str(gprs_buffer);

Below is the response i'm seeing in hyperterminal
Code: 
AT+CMGF=1
OK
AT+CMGS="+91900xxxxxxx"
> Hello0x1A
>
 

M95 Quectel GSM need fast response and higher baudrate for communication so try to your delay between you successive AT commands and after ctl+z (0x1a) wait for a few ms.

and basic thing check your network and sim balance to send a sms properly.
 

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