Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 7 23.06.2010
4.2.5 AT+CMGS Send SMS Message................................................................................106
4.2.6 AT+CMGW Write SMS Message to Memory ..........................................................107
4.2.7 AT+CMSS Send SMS Message from Storage ..........................................................108
4.2.8 AT+CNMI New SMS Message Indications ..............................................................109
4.2.9 AT+CPMS Preferred SMS Message Storage ............................................................112
4.2.10 AT+CRES Restore SMS Settings............................................................................ 113
4.2.11 AT+CSAS Save SMS Settings ................................................................................ 114
4.2.12 AT+CSCA SMS Service Center Address ................................................................ 114
4.2.13 AT+CSCB Select Cell Broadcast SMS Messages................................................... 115
4.2.14 AT+CSDH Show SMS Text Mode Parameters .......................................................117
4.2.15 AT+CSMP Set SMS Text Mode Parameters ........................................................... 117
4.2.16 AT+CSMS Select Message Service......................................................................... 118
5 AT Commands for SIM Application Toolkit.............................................................................121
5.1 STK AT Command..............................................................................................................121
6 AT Commands Special for SIMCOM........................................................................................123
6.1 Overview.............................................................................................................................123
6.2 Detailed Descriptions of Commands...................................................................................124
6.2.1 AT+SIDET Change the Side Tone Gain Level........................................................124
6.2.2 AT+CPOWD Power Off............................................................................................125
6.2.3 AT+SPIC Times Remain to Input SIM PIN/PUK .....................................................125
6.2.4 AT+CMIC Change the Microphone Gain Level.......................................................125
6.2.5 AT+CALA Set Alarm Time.......................................................................................127
6.2.6 AT+CADC Read ADC ..............................................................................................127
6.2.7 AT+CSNS Single Numbering Scheme......................................................................128
6.2.8 AT+CDSCB Reset Cell Broadcast ............................................................................129
6.2.9 AT+CMOD Configure Alternating Mode Calls ........................................................129
6.2.10 AT+CFGRI Indicate RI When Using URC .............................................................129
6.2.11 AT+CLTS Get Local Timestamp .............................................................................130
6.2.12 AT+CEXTHS External Headset Jack Control.........................................................130
6.2.13 AT+CEXTBUT Headset Button Status Reporting ..................................................131
6.2.14 AT+CSMINS SIM Inserted Status Reporting .........................................................132
6.2.15 AT+CLDTMF Local DTMF Tone Generation ........................................................133
6.2.16 AT+CDRIND CS Voice/Data Call Termination Indication.....................................133
6.2.17 AT+CSPN Get Service Provider Name from SIM ..................................................134
6.2.18 AT+CCVM Get and Set the Voice Mail Number on the SIM .................................135
6.2.19 AT+CBAND Get and Set Mobile Operation Band .................................................136
6.2.20 AT+CHF Configure Hands Free Operation.............................................................136
6.2.21 AT+CHFA Swap the Audio Channels .....................................................................137
6.2.22 AT+CSCLK Configure Slow Clock ........................................................................138
6.2.23 AT+CENG Switch On or Off Engineering Mode ...................................................138
6.2.24 AT+SCLASS0 Store Class 0 SMS to SIM When Received Class 0 SMS ..............140
6.2.25 AT+CCID Show ICCID ..........................................................................................141
6.2.26 AT+CMTE Set Critical Temperature Operating Mode or Query Temperature......141
6.2.27 AT+CBTE Battery Temperature Query...................................................................141