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SIM900 AT Command Manual

SIM900_AT Command Manual_V1.03 177 12/24/2010

connection will be shut.

z User can close gprs pdp context by AT+CIPSHUT. After it is closed,

the status is IP INITIAL.

z If "+PDP: DEACT" urc is reported which means the gprs is released by

the network, then user still needs to execute "AT+CIPSHUT"

command to make PDP context come back to original state.

8.2.8 AT+CLPORT Set Local Port

AT+CLPORT Set Local Port

Response

+CLPORT: (list of supported <port>s)

Test Command

AT+CLPORT=?

Parameters

See Write Command

Response

TCP: <port>

UDP: <port>

Read Command

AT+CLPORT?

Parameters

See Write Command

Response

ERROR

Write Command

AT+CLPORT=<

mode>,<port>

Parameters

<mode> a string parameter(string should be included in quotation

marks) which indicates the connection type

"TCP" TCP local port

"UDP" UDP local port

<port> 0-65535 a numeric parameter which indicates the local port

0 is default value, a port can be dynamically allocated a port.

Reference

Note

This command will be effective only in single connection mode

(+CIPMUX=0) and when module is set as a Client

8.2.9 AT+CSTT Start Task and Set APN, USER NAME, PASSWORD

AT+CSTT Start Task and Set APN, USER NAME, PASSWORD

Test Command Response

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