Data Sheet

SIM900 AT Commands Set
SIM900R01_ATC_V1.00 91 15.01.2010
Parameters
Response
+CSIM: < length >,< response >
OK
+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
3.2.50 AT+CALM Alert Sound Mode
AT+CALM Alert Sound Mode
Response
+CALM: (list of supported <mode>s)
OK
+CME ERROR: <err>
Test Command
AT+CALM=?
Parameter
See Write Command
Response
+CALM: <mode>
OK
+CME ERROR: <err>
Read Command
AT+CALM?
Parameter
See Write Command
Write Command
AT+CALM=<mo
de>
Response
OK
+CME ERROR: <err>