Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 170 12/24/2010
8.2 Detailed Descriptions of Commands
8.2.1 AT+CIPMUX Start Up Multi-IP Connection
AT+CIPMUX Start Up Multi-IP Connection
Response
+CIPMUX: (0,1)
OK
Test Command
AT+CIPMUX=?
Parameter
See Write Command
Response
+CIPMUX: <n>
OK
Read Command
AT+CIPMUX?
Parameter
See Write Command
Response
OK
Write Command
AT+CIPMUX=<
n>
Parameter
<n> 0 Single IP connection
1 Multi IP connection
Reference Note
z Only in IP initial state, AT+CIPMUX=1 is effective;
z Only when multi IP connection and GPRS application are both shut
down, AT+CIPMUX=0 is effective.
8.2.2 AT+CIPSTART Start Up TCP or UDP Connection
AT+CIPSTART Start Up TCP or UDP Connection
Test Command
AT+CIPSTART=
?
Response
1) If AT+CIPMUX=0
+CIPSTART: (list of supported <mode>),(<IP address>),(<port>)
+CIPSTART: (list of supported <mode>),(<domain name>),(<port>)
OK
2) If AT+CIPMUX=1
+CIPSTART: (list of supported <n>),(list of supported <mode>),(<IP
address>),(<port>)
+CIPSTART: (list of supported <n>),(list of supported <mode>),(<domain
name>),(<port>)