Wiznet WizFi360 At Instruction Set page 47

<remote IP>: destination IP address or domain name
<remote port>: Destination port number, in the range of 1 ~ 65535 (The default local port number is
333, the registered local port numbers should be avoided, see Appendix 1)
<TCP Keep alive>: about Keep Alive packet, it only operates <type> is "TCP"
-0: Don't use Keep Alive packet (factory default)
-1 to 7200: Keep alive packet transmission time interval in 1s
\r\n
OK\r\n
or
\r\n
Return Values
ERROR\r\n
and
descriptions
or
\r\n
ALREADY CONNECTED\r\n
(If the TCP connection is already established.)
Predecessors -
Command: AT+CIPSTART="TCP","192.168.1.99",5000\r\n
Example 1 Reply:\r\n
OK\r\n
Command: AT+CIPSTART=1,"TCP","www.iwiznet.cn",5000,10\r\n
Example 2 Reply:\r\n
OK\r\n
WizFi360 AT command