Data Sheet

SIM900 AT Commands Set
SIM900_ATC_V1.00 172 15.01.2010
connection
(+CIPMUX=1)
AT+CIPACK=<
n>
OK
Parameters
<n> a numeric parameter which indicates the connection number
<txlen> the data amount which has been sent
<acklen> the data amount confirmed successful by the server
<nacklen>the data amount without confirmed by the server
Reference Note
8.2.6 AT+CIPCLOSE Close TCP Or UDP Connection
AT+CIPCLOSE Close TCP Or UDP Connection
Test Command
AT+CIPCLOSE
=?
Response
OK
Execution
Command
AT+CIPCLOSE
Response
If close successfully:
CLOSE OK
If close fail:
ERROR
Write Command
1) If single IP
connection
(+CIPMUX=0)
AT+CIPCLOSE
=<id>
2) If multi IP
connection
(+CIPMUX=1)
AT+CIPCLOSE
=<n><id>
Response:
1) If single IP connection (+CIPMUX=0)
CLOSE OK
2) If multi IP connection (+CIPMUX=1)
<n>, CLOSE OK
Parameters
<id> 0 slow close (default)
1 quick close
<n> a numeric parameter which indicates the connection number
Reference Note
z AT+CIPCLOSE only close connection at the status of TCP/UDP
CONNECTING or CONNECT OK，otherwise response ERROR, after
closing the connection, the status is IP CLOSE when in single IP mode
8.2.7 AT+CIPSHUT Deactivate GPRS PDP Context
AT+CIPSHUT Deactivate GPRS PDP Context