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This code is working to send data on GPRS by sim900A
string_serial("AT+CGATT=1\n\r");
/////////////////////////////////////////////////////////////////////// Attach to GPRS Service
while(rec_serial() != 'K')...
This is how you send AT commands to SIM300 module to setup GPRS connection.
>> AT+CGATT=1 - Attach to GPRS Service
<< OK
>> AT+CGDCONT=1,"IP","<apn>" - Define PDP Context (cid, PDP type, APN)
<< OK
>> AT+CSTT="<apn>","","" - Start Task & set APN, User ID, and password...
This is how you send AT commands to SIM300 module to setup GPRS connection.
>> AT+CGATT=1 - Attach to GPRS Service
<< OK
>> AT+CGDCONT=1,"IP","<apn>" - Define PDP Context (cid, PDP type, APN)
<< OK
>> AT+CSTT="<apn>","","" - Start Task & set APN, User ID, and...
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