Specifications

Smart Machine Smart Decision
SIM900_AT Commands Manual_V1.07 9 2012.12.10
6.2.20 AT+CBAND Get and Set Mobile Operation Band .................................................140
6.2.21 AT+CHF Configure Hands Free Operation.............................................................141
6.2.22 AT+CHFA Swap the Audio Channels .....................................................................141
6.2.23 AT+CSCLK Configure Slow Clock ........................................................................142
6.2.24 AT+CENG Switch On or Off Engineering Mode ...................................................143
6.2.25 AT+SCLASS0 Store Class 0 SMS to SIM When Received Class 0 SMS ..............144
6.2.26 AT+CCID Show ICCID ..........................................................................................145
6.2.27 AT+CMTE Set Critical Temperature Operating Mode or Query Temperature......145
6.2.28 AT+CBTE Battery Temperature Query...................................................................146
6.2.29 AT+CSDT Switch On or Off Detecting SIM Card.................................................146
6.2.30 AT+CMGDA Delete All SMS................................................................................147
6.2.31 AT+STTONE Play SIM Toolkit Tone....................................................................148
6.2.32 AT+SIMTONE Generate Specifically Tone...........................................................149
6.2.33 AT+CCPD Enable or Disable Alpha String............................................................149
6.2.34 AT+CGID Get SIM Card Group Identifier.............................................................150
6.2.35 AT+MORING Show State of Mobile Originated Call............................................150
6.2.36 AT+CMGHEX Enable or Disable Sending Non-ASCII Character SMS ...............151
6.2.37 AT+CCODE Configure SMS Code Mode..............................................................152
6.2.38 AT+CIURC Enable or Disable Initial URC Presentation.......................................152
6.2.39 AT+CPSPWD Change PS Super Password ............................................................153
6.2.40 AT+EXUNSOL Enable or Disable Proprietary Unsolicited Indications.................153
6.2.41 AT+CGMSCLASS Change GPRS Multislot Class ................................................154
6.2.42 AT+CDEVICE View Current Flash Device Type ..................................................155
6.2.43 AT+CCALR Call Ready Query ..............................................................................155
6.2.44 AT+GSV Display Product Identification Information.............................................156
6.2.45 AT+SGPIO Control the GPIO .................................................................................156
6.2.46 AT+SPWM Generate the Pulse-Width-Modulation ................................................157
6.2.47 AT+ECHO Echo Cancellation Control ...................................................................158
6.2.48 AT+CAAS Control Auto Audio Switch ..................................................................159
6.2.49 AT+SVR Configure Voice Coding Type for Voice Calls.........................................160
6.2.50 AT+GSMBUSY Reject Incoming Call....................................................................161
6.2.51 AT+CEMNL Set the List of Emergency Number ...................................................161
6.2.52 AT*CELLLOCK Set the List of ARFCN Which Needs to Be Locked...................162
6.2.53 AT+SLEDS Set the Timer Period of Net Light .......................................................163
6.2.54 AT+CCHGMODE Indicates If the Module Is Powered Off....................................164
6.2.55 AT+CBUZZERRING Use the Buzzer Sound as the Incoming Call Ring...............164
6.2.56 AT+CEXTERNTONE Close or Open the Microphone...........................................164
6.2.57 AT+CNETLIGHT Close the Net Light or Open It to Shining ................................165
6.2.58 AT+CWHITELIST Set the White List ....................................................................165
6.2.59 AT+CUSACC Accelerate Uart Response Speed.....................................................166
6.2.60 AT+CNETSCAN Performing A Net Survey to Show All the Cells Information ....167
6.2.61 AT+CSGS Netlight Indication of GPRS Status.......................................................167
6.2.62 AT+SKPD Enable Keypad Indication .....................................................................168
7 AT Commands for GPRS Support.............................................................................................170