Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 88 12/24/2010
Test Command
AT+CSIM=?
Response
OK
Response
+CSIM: <length>,<response>
OK
If error is related to ME functionality:
+CME ERROR: <err>
Write Command
AT+CSIM=<leng
th>,<Command>
Parameters
<length> integer type: length of characters sent to the TE in
<Command> or <response> (i.e. twice the number of
octets in the raw data)
<Command> string type(string should be included in quotation
marks): hex format: GSM 11.11 SIM Command sent
from the ME to the SIM
<response> string type(string should be included in quotation
marks): hex format: GSM 11.11 response from SIM to
<Command>
Reference
GSM 07.07 [13]
Note
3.2.49 AT+CALM Alert Sound Mode
AT+CALM Alert Sound Mode
Response
+CALM: (list of supported <mode>s)
OK
If error is related to ME functionality:
+CME ERROR: <err>
Test Command
AT+CALM=?
Parameter
See Write Command
Response
+CALM: <mode>
OK
If error is related to ME functionality:
+CME ERROR: <err>
Read Command
AT+CALM?
Parameter
See Write Command
Write Command Response