Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 176 23.06.2010
<port> 0-65535 a numeric parameter which indicates the local port
0 is default value, it can be dynamically allocated a port.
Reference Note
This command will be effective only in single connection mode
(+CIPMUX=0) and when module as a Client
8.2.9 AT+CSTT START Task and Set APN、USER NAME、PASSWORD
AT+CSTT Start Task and Set APN、USER NAME、PASSWORD
Test Command
AT+CSTT=?
Response
+CSTT: "APN","USER","PWD"
OK
Read Command
AT+CSTT?
Response
+CSTT: <apn>,<user name>,<password>
OK
Parameters
See Write Command
Write Command
AT+CSTT=<apn
>,<user name>,<
password>
Response
OK
ERROR
Parameters
<apn> a string parameter(string should be included in quotation
marks) which indicates the GPRS access point name
<user name> a string parameter(string should be included in quotation
marks) which indicates the GPRS user name
<password> a string parameter(string should be included in quotation
marks) which indicates the GPRS password
Execution
Command
AT+CSTT
Response
OK
ERROR
Reference Note
The write command and execution command of this command is valid only
at the state of IP INITIAL. After operating this command, the state will be
changed to IP START.
8.2.10 AT+CIICR Bring Up Wireless Connection with GPRS or CSD
AT+CIICR Bring Up Wireless Connection with GPRS or CSD
Test Command
AT+CIICR=?
Response
OK