at+cgdcont=1,"ip","cmnet"

OK
at%etcpip="",""

OK
at%etcpip?

%ETCPIP:1,"10.206.238.167",,"211.136.20.203","211.136.20.203"

OK
at%ipopen="tcp","61.144.177.184",3333

CONNECT
at%ipsend="3232"

%IPSEND:15

OK

%IPDATA:147,"393939393939393939393939393939393939393939393838383838383838383838383838383838383838383838383838363636363636363636363636363636363636363636363636363636363636363636363434343434343434343434343434343434343434343434343434343434343434343434343439393939393939393939393939393939393939393939393939393939"


at%ipclose=1                   // AT%IPCLOSE=1  关闭TCP SOCKET连接，返回OK需要7－10s左右，请设计超时等待时注意。

%IPCLOSE: 1

OK

at%ipclose=5                   // AT%IPCLOSE=1关闭成功后，才能AT%IPCLOSE=5。
                               // 否则可能出现TCP连接异常断开，造成中心余留客户端IP地址。

OK


                               // AT%IPCLOSE=5返回OK以后，可以重新设置APN。以及重新连接at%etcpip="",""。

at+cgdcont?

+CGDCONT: 1,"IP","cmnet","",0,0

OK
at+cgdcont?

+CGDCONT: 1,"IP","cmnet","",0,0

OK