Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 8 23.06.2010
6.2.28 AT+CSDT Switch On or Off Detecting SIM Card.................................................142
6.2.29 AT+CMGDA Delete All SMS................................................................................142
6.2.30 AT+STTONE SIM Toolkit Play Tone Command ..................................................143
6.2.31 AT+SIMTONE Generate Specifically Tone...........................................................144
6.2.32 AT+CCPD Connected Line Identification Presentation Without Alpha String......145
6.2.33 AT+CGID Get SIM Card Group Identifier................................................................145
6.2.34 AT+MORING Show State of Mobile Originated Call............................................146
6.2.35 AT+CMGHEX Enable to Send Non-ASCII Character SMS..................................146
6.2.36 AT+AUTEST Audio Channel Loopback Test........................................................147
6.2.37 AT+CCODE Configure SMS Code Mode..............................................................147
6.2.38 AT+CIURC Enable or Disable Initial URC Presentation .......................................148
6.2.39 AT+CPSPWD Change PS Super Password ............................................................148
6.2.40 AT+EXUNSOL Enable /Disable Proprietary Unsolicited Indications ....................149
6.2.41 AT+CGMSCLASS Change GPRS Multislot Class ................................................150
6.2.42 AT+CDEVICE View Current Flash Device Type .....................................................151
6.2.43 AT+CCALR Call Ready Query ..............................................................................151
6.2.44 AT+GSV Display Product Identification Information.............................................152
6.2.45 AT+SGPIO Control the GPIO .................................................................................152
6.2.46 AT+SPWM Generate the Pulse-Width-Modulation ................................................153
6.2.47 AT+ECHO Echo Cancellation Control ...................................................................154
7 AT Commands for GPRS Support.............................................................................................155
7.1 Overview of AT Commands for GPRS Support..................................................................155
7.2 Detailed Descriptions of AT Commands for GPRS Support...............................................155
7.2.1 AT+CGATT Attach /Detach from GPRS Service .....................................................155
7.2.2 AT+CGDCONT Define PDP Context.......................................................................156
7.2.3 AT+CGQMIN Quality of Service Profile (Minimum Acceptable) ...........................158
7.2.4 AT+CGQREQ Quality of Service Profile (Requested) .............................................160
7.2.5 AT+CGACT PDP Context Activate or Deactivate....................................................161
7.2.6 AT+CGDATA Enter Data State .................................................................................162
7.2.7 AT+CGPADDR Show PDP Address .........................................................................162
7.2.8 AT+CGCLASS GPRS Mobile Station Class.............................................................163
7.2.9 AT+CGEREP Control Unsolicited GPRS Event Reporting......................................164
7.2.10 AT+CGREG Network Registration Status ..............................................................165
7.2.11 AT+CGSMS Select Service for MO SMS Messages ..............................................166
8 AT Commands for TCPIP Application Toolkit .........................................................................168
8.1 Overview.............................................................................................................................168
8.2 Detailed Descriptions of Commands...................................................................................168
8.2.1 AT+CIPMUX Start Up Multi-IP Connection ............................................................168
8.2.2 AT+CIPSTART Start Up TCP or UDP Connection...................................................169
8.2.3 AT+CIPSEND Send Data Through TCP or UDP Connection...................................171
8.2.4 AT+CIPQSEND Select Data Transmitting Mode .....................................................173
8.2.5 AT+CIPACK Query Previous Connection Data Transmitting State..........................173
8.2.6 AT+CIPCLOSE Close TCP or UDP Connection .....................................................174
8.2.7 AT+CIPSHUT Deactivate GPRS PDP Context ........................................................175