Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 78 12/24/2010
Response
+CRSM: <sw1>, <sw2> [,<response>]
OK
ERROR
If error is related to ME functionality:
+CME ERROR: <err>
Write Command
AT+CRSM=<Co
mmand>[,<fileId
>[,<P1>,<P2>,<P
3>[,<data>]]]
Parameters
<Command>
176 READ BINARY
178 READ RECORD
192 GET RESPONSE
214 UPDATE BINARY
220 UPDATE RECORD
242 STATUS
All other values are reserved; refer GSM 11.11.
<fileId> integer type; this is the identifier for an elementary data file on
SIM. Mandatory for every Command except STATUS
<P1>,<P2>,<P3> integer type, range 0 – 255
Parameters to be passed on by the ME to the SIM; refer GSM
11.11.
<data> information which shall be written to the SIM (hex-decimal
character format)
<sw1>, <sw2> integer type, range 0 - 255
Status information from the SIM about the execution
of the actual Command. These parameters are delivered to the
TE in both cases, on successful or failed execution of the
Command; refer GSM 11.11.
<response> response of a successful completion of the Command
previously issued (hexadecimal character format)
Reference
GSM 07.07
GSM 11.11
Note
3.2.35 AT+CSQ Signal Quality Report
AT+CSQ Signal Quality Report
Test Command
AT+CSQ=?
Response
+CSQ: (list of supported <rssi>s),(list of supported <ber>s)
OK
Execution
Command
AT+CSQ
Response
+CSQ: <rssi>,<ber>