Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 8 12/24/2010
6.2.29 AT+CSDT Switch On or Off Detecting SIM Card.................................................140
6.2.30 AT+CMGDA Delete All SMS................................................................................141
6.2.31 AT+STTONE Play SIM Toolkit Tone....................................................................142
6.2.32 AT+SIMTONE Generate Specifically Tone...........................................................143
6.2.33 AT+CCPD Enable or Disable Alpha String............................................................143
6.2.34 AT+CGID Get SIM Card Group Identifier.............................................................144
6.2.35 AT+MORING Show State of Mobile Originated Call............................................144
6.2.36 AT+CMGHEX Enable or Disable Sending Non-ASCII Character SMS ...............145
6.2.37AT+AUTEST Audio Channel Loopback Test.........................................................146
6.2.38AT+CCODE Configure SMS Code Mode...............................................................146
6.2.39 AT+CIURC Enable or Disable Initial URC Presentation.......................................147
6.2.40 AT+CPSPWD Change PS Super Password ............................................................147
6.2.41 AT+EXUNSOL Enable or Disable Proprietary Unsolicited Indications.................148
6.2.42 AT+CGMSCLASS Change GPRS Multislot Class ................................................148
6.2.43 AT+CDEVICE View Current Flash Device Type ..................................................149
6.2.44 AT+CCALR Call Ready Query ..............................................................................149
6.2.45 AT+GSV Display Product Identification Information.............................................150
6.2.46 AT+SGPIO Control the GPIO .................................................................................150
6.2.47 AT+SPWM Generate the Pulse-Width-Modulation ................................................151
6.2.48 AT+ECHO Echo Cancellation Control ...................................................................152
6.2.49 AT+CAAS Control Auto Audio Switch ..................................................................153
6.2.50 AT+SVR Configure Voice Coding Type for Voice Calls.........................................154
6.2.51 AT+GSMBUSY Reject Incoming Call....................................................................155
7 AT Commands for GPRS Support.............................................................................................156
7.1 Overview of AT Commands for GPRS Support..................................................................156
7.2 Detailed Descriptions of AT Commands for GPRS Support...............................................156
7.2.1 AT+CGATT Attach or Detach from GPRS Service ..................................................156
7.2.2 AT+CGDCONT Define PDP Context .......................................................................157
7.2.3 AT+CGQMIN Quality of Service Profile (Minimum Acceptable) ...........................159
7.2.4 AT+CGQREQ Quality of Service Profile (Requested) .............................................160
7.2.5 AT+CGACT PDP Context Activate or Deactivate....................................................162
7.2.6 AT+CGDATA Enter Data State .................................................................................162
7.2.7 AT+CGPADDR Show PDP Address .........................................................................163
7.2.8 AT+CGCLASS GPRS Mobile Station Class.............................................................164
7.2.9 AT+CGEREP Control Unsolicited GPRS Event Reporting......................................165
7.2.10 AT+CGREG Network Registration Status ..............................................................166
7.2.11 AT+CGSMS Select Service for MO SMS Messages ..............................................167
8 AT Commands for TCPIP Application Toolkit .........................................................................169
8.1 Overview.............................................................................................................................169
8.2 Detailed Descriptions of Commands...................................................................................170
8.2.1 AT+CIPMUX Start Up Multi-IP Connection ............................................................170
8.2.2 AT+CIPSTART Start Up TCP or UDP Connection...................................................170
8.2.3 AT+CIPSEND Send Data Through TCP or UDP Connection...................................172
8.2.4 AT+CIPQSEND Select Data Transmitting Mode .....................................................174