GSM900TCP/UDP Connection

Tcp
Send:
At+cipstart= "TCP", "122.0.114.244", 1001
Return:
Ok

CONNECT OK

Send:
At+cipsend>hello every one!
0x1a

Disconnect Connection
At+cipshut

Close the move scene (PDP context to activate GPRS to attach)
At+cipshut return: O

(Need to re-connect in the background)

(back after the background is broken
CLOSED
)

ERROR

Already CONNECT
(representing already connected state)

Udp

Send:
At+cipstart= "UDP", "122.0.114.244", 1001
Return:
Ok

CONNECT OK

Send:
At+cipsend>hello every one!
0x1a

Disconnect Connection
At+cipshut
Return:
SHUT OK

(UDP does not need to be re-connected after the background is disconnected)

TCP UDP can communicate with each other on the premise of connection

After the UDP is disconnected in the background, the background is logged in again, the module sends the data back to the background and can be connected, and the two can communicate with each other.

GSM900TCP/UDP Connection