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Hi, I am using the Wavecom Classic module. I am able to control this module using 8051 for sending the SMS. When I try to receive the Message from the Module, I am failing. I know all the AT commands. What I need is how I can recive the data coming from module. There is no serial error or buad rate error. B'cos it is working for sending SMS. If any boday have a small part of teh code to receive the OK at aleast from the Modem..please advise me. Thank you
If you send commands over the serial like this
printf("AT\n");
and wait fot the response like this:
gets (buf, sizeof(buf)-1);
buf will probably be empty and you will conclude you didn't receive anything. But this may be because the modem echoes back the '\n' (which ends the 'gets' operation) before sending the reply you are waiting for, e.g. "OK".
If you send commands like that, then your AT Command is incorrectly terminated!
See my post titled "AT Command Termination Character" (21-Mar-2007 20:14) in this thread: http://www.keil.com/forum/docs/thread9483.asp
"...this may be because the modem echoes back the '\n' (which ends the 'gets' operation) before sending the reply you are waiting for, e.g. 'OK'"
That would be Number 6 on my previous list:
"6. The controller sent the command, the modem received it, sent a valid response, it reached the controller, but your software didn't correctly handle it."
See: http://www.keil.com/forum/docs/thread9644.asp
As previously noted, SIVA RAMA PRASAD S (aka "Ram siva"?) needs to put the work in to determining exactly what is and is not happening in his/her system...