Data Sheet

SIM900 AT Commands Set

SIM900R01_ATC_V1.00 80 15.01.2010

Parameters

<iws> 0-61 Interworking window size (IWF to MS)

<mws> 0-61 Mobile window size(MS to IWF)

<T1> 44-255 acknowledgment timer T1 in 10 ms units

<N2> 1-255 retransmission attempts N2

<verx> 0 RLP version number

<T4> 7 re-sequencing period in integer format, in units of 10

ms.

Reference

GSM 07.07 [13]

Note

3.2.34 AT+CRSM Restricted SIM Access

AT+CRSM Restricted SIM Access

Test Command

AT+CRSM=?

Response

Write Command

AT+CRSM=<Co

mmand>[,<fileId

>[,<P1>,<P2>,<P

3>[,<data>]]]

Response

+CRSM: <sw1>, <sw2> [,<response>]

OK / ERROR / +CME ERROR: <err>

Parameters

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.