SimCom SIM5300E At Command Manual page 161

Parameters
Reference
SIM5300E AT Command Manual V1.02
<n>
0..7 A numeric parameter which indicates the connection number
<mode> A string parameter which indicates the connection type
"TCP" Establish a TCP connection
"UDP" Establish a UDP connection
<IP address> A string parameter which indicates remote server IP address
<port> Remote server port
<domain name> A string parameter which indicates remote server
domain name
<state> A string parameter 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
Note:
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.
When module is in multi-IP state, before this command is executed, it is
necessary to process "AT+CSTT, AT+CIICR, AT+CIFSR".
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