Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 163 12/24/2010
Parameter
See Write Command
Response
CONNECT
If error is related to ME functionality:
+CME ERROR: <err>
Write Command
AT+CGDATA=<
L2P>,[<cid>]
Parameters
<L2P> a string parameter (string should be included in quotation
marks) that indicates the layer 2 protocol to be used between the
TE and MT:
PPP – Point to Point protocol for a PDP such as IP
Other values are not supported and will result in an ERROR
response to the execution Command.
<cid> a numeric parameter which specifies a particular PDP context
definition (see +CGDCONT Command)
1..3 PDP Context Identifier. cid 3 is reserved and is always
defined, it cannot be changed by user.
Reference Note
7.2.7 AT+CGPADDR Show PDP Address
AT+CGPADDR Show PDP Address
Response
+CGPADDR: (list of defined <cid>s)
OK
Test Command
AT+CGPADDR=
?
Parameters
See Write Command
Response
+CGPADDR: <cid>,<PDP_addr>
[<CR><LF>+CGPADDR: <cid>,<PDP_addr>[…]]
OK
ERROR
Write Command
AT+CGPADDR=
<cid>
Parameters
<cid> a numeric parameter which specifies a particular PDP context
definition (see +CGDCONT Command) If <cid> is not specified,