sim900d responce issues

[sp2012]

Hi everyone,
I am using sim900d in my project.
In this sim900d module if i send 60 bytes of data then its ok.suppose if i want to send 256 bytes means theni cant get the responce from sim900d what can i do?

 

[kgshankar1980]

@sp2012,

Pls explain your issue in details..

In which mode you are sending data TCP/FTP etc... pls be clear in your querry...

 

[sp2012]

hi,
I am sending TCP mode,and these are the commands,

>>ATE0
>>AT+CREG?
>>AT+CIPSTATUS
>>AT+CSTT=
modem_send("airtelgprs.com");
>>AT+CIICR
>>AT+CIFSR
>>AT+CIPSTART=\"TCP\",\"74.125.226.35\",\"80\"\r\n
>>AT+CIPSEND
sprintf(send_frame"A=%s&B=%s&C=%s&C=%s&D=%s&E=%d&F=%d",IMEI,latt,lon,dmy,hms,speed,gsm_signal,gps_signal);
modem_send(send_frame);
Now what happen.If i send these strings then no issues to send i got send ok respnce suppose if i add two more parameters then responce wont come wht is the issues please help me