Manual
     Smart Machine Smart Decision 
SIM800 Series_AT Command Manual_V1.09  229  2015-08-03 
See Write Command 
Response 
OK 
ERROR 
Write Command 
1) For single IP 
connection 
(+CIPMUX=0) 
AT+CLPORT=<
mode>,<port> 
2) For multi IP 
connection 
(+CIPMUX=1) 
AT+CLPORT=<
n>,<mode>,<por
t> 
Parameters 
<n> 0..5 A numeric parameter which indicates the connection 
number this used in multi IP connection 
<mode>     A string parameter which indicates the connection type 
  "TCP" TCP local port 
  "UDP" UDP local port 
<port> 0-65535 A numeric parameter which indicates the local port
 default value is 0, a port can be dynamically allocated a port.
Parameter Saving 
Mode 
NO_SAVE 
Max Response 
Time 
- 
Reference 
Note 
This command will be effective when module is set 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 
Response 
+CSTT: "APN","USER","PWD" 
OK 
Test Command 
AT+CSTT=? 
Parameters 
See Write Command 
Response 
+CSTT: <apn>,<user name>,<password> 
OK 
Read Command 
AT+CSTT? 
Parameters 
See Write Command 
Response 
OK 
ERROR 
Write Command 
AT+CSTT=<apn
>,<user 
name>,<passwor
d> 
Parameters 
<apn>                A string parameter which indicates the GPRS access point 
name 
<user name> A string parameter which indicates the GPRS user name 
<password> A string parameter which indicates the GPRS password 










