Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 172 12/24/2010
<domain name> a string parameter(string should be included in quotation
marks) which indicates remote server domain name
<state> a string parameter(string should be included in quotation
marks) which indicates the progress of connecting
0 IP INITIAL
1 IP START
2 IP CONFIG
3 IP GPRSACT
4 IP STATUS
5 TCP CONNECTING/UDP CONNECTING/
SERVER LISTENING
6 CONNECT OK
7 TCP CLOSING/UDP CLOSING
8 TCP CLOSED/UDP CLOSED
9 PDP DEACT
In Multi-IP state:
0 IP INITIAL
1 IP START
2 IP CONFIG
3 IP GPRSACT
4 IP STATUS
5 IP PROCESSING
9 PDP DEACT
Reference Note
z This command allows establishment of a TCP/UDP connection only
when the state is IP INITIAL or IP STATUS when it is in single state.
In multi-IP state, the state is in IP STATUS only. So it is necessary to
process "AT+CIPSHUT" before user establishes a TCP/UDP
connection with this command when the state is not IP INITIAL or IP
STATUS.
z When module is in multi-IP state, before this command is executed, it
is necessary to process "AT+CSTT, AT+CIICR, AT+CIFSR".
8.2.3 AT+CIPSEND Send Data Through TCP or UDP Connection
AT+CIPSEND Send Data Through TCP or UDP Connection
Test Command
AT+CIPSEND=?
Response
1) For single IP connection (+CIPMUX=0)
+CIPSEND: <length>
OK
2) For multi IP connection (+CIPMUX=1)
+CIPSEND: <0-7>,<length>