Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 113 23.06.2010
Parameters
see Write Command
Response
TA selects memory storages <mem1>, <mem2> and <mem3> to be used for
reading, writing, etc.
+CPMS: <used1>,<total1>,<used2>,<total2>,<used3>,<total3>
OK
If error is related to ME functionality:
ERROR
Write Command
AT+CPMS=
<mem1>
[,<mem2>
[,<mem3>]]
Parameters
<mem1> Messages to be read and deleted from this memory
storage
"SM" SIM message storage
<mem2> Messages will be written and sent to this memory
storage
"SM" SIM message storage
<mem3> Received messages will be placed in this memory
storage if routing to PC is not set ("+CNMI")
"SM" SIM message storage
<usedx> integer type; Number of messages currently in
<memx>
<totalx> integer type; Number of messages storable in <memx>
Reference
GSM 07.05
Note
4.2.10 AT+CRES Restore SMS Settings
AT+CRES Restore SMS Settings
Test Command
AT+CRES=?
Response
+CRES: (list of supported <profile>s)
OK
Write Command
AT+CRES=<pro
file>
Response
TA restores SMS settings for +CSCA, +CSMP from non-volatile memory
to active memory.
OK
If error is related to ME functionality:
ERROR