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SIM900 at command manual_v1.05 http://www..net/ datasheet pdf - http://www..net/
smart machine smart decision SIM900_at command manual_v1.05 2 2011.10.24 document title: SIM900 at command manual version: 1.05 date: 2011-10-24 status: release document control id: SIM900_at command manual_v1.05 general notes simcom offers this information as a service to its customers, to support application and engineering efforts that use the products designed by simcom. the information provided is based upon requirements specifically provided to simcom by the customers. simcom has not undertaken any independent search for additional relevant information, including any information that may be in the customer?s possession. furthermore, system validation of this product designed by simcom within a larger electronic system rema ins the responsibility of the customer or the customer?s system integrator. all specifications supplied herein are subject to change. copyright this document contains proprietary technical information which is the property of shanghai simcom wireless solutions ltd, copying of this document and giving it to others and the using or communication of the contents thereof, are forb idden without express authority. offenders are liable to the payment of damages. all rights reserved in the event of grant of a patent or the registration of a utility model or design. all specification supplied herein are subject to change without notice at any time. copyright ? shanghai simcom wireless solutions ltd. 2011 http://www..net/ datasheet pdf - http://www..net/ smart machine smart decision SIM900_at command manual_v1.05 3 2011.10.24 version history version chapter what is new v1.00 new version created on the basis of SIM900 at test result v1.01 3.2.50 at+cals 6.2.27 at+cbte 6.2.30 at+sttone 8.2.21 at+cipdpdp 8.2.25at+cipudpmode 6.2.45 at+sgpio 6.2.46 at+spwm 6.2.47 at+echo add new command add new command add new command add new command add new command add new command add new command add new command v1.02 3.2.16 at+clcc 3.2.30 at+cr add write command add parameter gprs v1.03 6.2.47 at+spwm 6.2.48 at+echo 6.2.50 at+gsmbusy 8.2.26 at+ciprxget 8.2.27 at+cipqrclose 8.2.28 at+cipscont 9.2.1 at+sapbr 10.2.x http commands 11.2.x ftp commands modified the command modified the parameter scope add new command add new command add new command add new command add new command add new commands add new commands v1.04 6.2.51 at+cemnl 6.2.52 at*celllock 8.2.29 at+ciptxiss 6.2.53 at+sleds add new command add new command add new command add new command v1.05 10.2.3 at+httppara 8.2.29 at+ciptxiss 6.2.54 at+cchgmode 6.2.55 at+cbuzzerring 6.2.56 at+cexterntone 6.2.57 at+cnetlight 6.2.58 at+cwhitelist 11.2.17 at+ftpdele 11.2.18 at+ftpsize 11.2.19 at+ftpstate 6.2.59 at+cusacc added new values of smart machine smart decision SIM900_at command manual_v1.05 4 2011.10.24 contents version history ............................................................................................................................... ..3 1 introduction ............................................................................................................................... ...11 1.1 scope of the document .......................................................................................................... 11 1.2 related documents ................................................................................................................ 11 1.3 conventions and abbreviations .............................................................................................12 1.4 at command syntax .............................................................................................................12 1.4.1 basic syntax ...................................................................................................................12 1.4.2 s parameter syntax .........................................................................................................13 1.4.3 extended syntax.............................................................................................................13 1.4.4 combining at commands on the same command line .................................................13 1.4.5 entering successive at commands on separate lines .....................................................13 1.5 supported character sets ........................................................................................................13 1.6 flow control ..........................................................................................................................14 1.6.1 software flow control (xon/xoff flow control) .........................................................14 1.6.2 hardware flow contro l (rts/cts flow control) ............................................................15 2 at commands according to v.25ter .......................................................................................16 2.1 overview of at commands according to v.25ter ............................................................16 2.2 detailed description of at commands according to v.25ter ...........................................17 2.2.1 a/ re-issues the last command given .......................................................................17 2.2.2 ata answer an incoming call ....................................................................................17 2.2.3 atd mobile originated call to dial a number ..........................................................18 2.2.4 atd> smart machine smart decision SIM900_at command manual_v1.05 5 2011.10.24 2.2.23 ats10 set disconnect delay afte r indicating the absence of data carrier ..............30 2.2.24 att select tone dialing ...........................................................................................31 2.2.25 atv ta response format .......................................................................................31 2.2.26 atx set connect result code format and monitor call progress .....................32 2.2.27 atz reset default configuration .............................................................................32 2.2.28 at&c set dcd function mode ...............................................................................33 2.2.29 at&d set dtr function mode ................................................................................33 2.2.30 at&f factory defined configuration ......................................................................34 2.2.31 at&v display current configuration ......................................................................36 2.2.32 at&w store active profile ......................................................................................36 2.2.33 at+gcap request complete ta capabilities list ..................................................37 2.2.34 at+gmi request manufacturer identification .........................................................37 2.2.35 at+gmm request ta model identification ............................................................37 2.2.36 at+gmr request ta revision identification of software release .........................38 2.2.37 at+goi request global object identification .........................................................38 2.2.38 at+gsn request ta seri al number identi fication (imei) .....................................39 2.2.39 at+icf set te-ta control character framing ........................................................39 2.2.40 at+ifc set te-ta local data flow control ..........................................................40 2.2.41 at+ipr set te-ta fixed local rate .......................................................................41 2.2.42 at+hvoic disconnect voice call only ..................................................................42 3 at commands according to gsm07.07 .....................................................................................43 3.1 overview of at command according to gsm07.07 ...........................................................43 3.2 detailed descriptions of at command according to gsm07.07 ........................................44 3.2.1 at+cacm accumulated call meter (acm) reset or query ....................................44 3.2.2 at+camm accumulated call meter maximum (acm max) set or query .............45 3.2.3 at+caoc advice of charge .....................................................................................46 3.2.4 at+cbst select bearer service type ........................................................................47 3.2.5 at+ccfc call forwarding number and conditions control ....................................48 3.2.6 at+ccwa call waiting control ................................................................................49 3.2.7at+ceer exte nded error report ...............................................................................51 3.2.8 at+cgmi request ma nufacturer identification ........................................................53 3.2.9 at+cgmm request model identification ..................................................................53 3.2.10 at+cgmr request ta revision identification of software release ......................54 3.2.11 at+cgsn request product serial number identification (identical with +gsn) ...54 3.2.12 at+cscs select te character set ...........................................................................54 3.2.13 at+csta select type of address ............................................................................55 3.2.14 at+chld call hold and multiparty ........................................................................56 3.2.15 at+cimi request internat ional mobile subscriber identity ....................................57 3.2.16 at+clcc list current calls of me .........................................................................58 3.2.17 at+clck facility lock ...........................................................................................59 3.2.18 at+clip calling line identification presentation ...................................................61 3.2.19 at+clir calling line identification restriction .....................................................62 3.2.20 at+cmee report mobile equipment error .............................................................63 3.2.21 at+colp connected line identification presentation ............................................64 http://www..net/ datasheet pdf - http://www..net/ smart machine smart decision SIM900_at command manual_v1.05 6 2011.10.24 3.2.22 at+cops operator selection ...................................................................................65 3.2.23 at+cpas phone activity status ...............................................................................67 3.2.24 at+cpbf find phonebook entries ...........................................................................67 3.2.25 at+cpbr read current phonebook entries ............................................................68 3.2.26 at+cpbs select phonebook memory storage .........................................................69 3.2.27 at+cpbw write phonebook entry ..........................................................................70 3.2.28 at+cpin enter pin ..................................................................................................71 3.2.29 at+cpwd change password ...................................................................................72 3.2.30 at+cr service reporting control ...........................................................................73 3.2.31 at+crc set cellular result codes for incoming call indication ...........................74 3.2.32 at+creg network registration ..............................................................................75 3.2.33 at+crlp select radio link protocol parameters ...................................................76 3.2.34 at+crsm restricted sim access ...........................................................................77 3.2.35 at+csq signal quality report ................................................................................78 3.2.36 at+fclass fax: select , read or test service class ............................................79 3.2.37 at+fmi fax: report manufactured id ...................................................................79 3.2.38 at+fmm fax: report model id ............................................................................80 3.2.39 at+fmr fax: report revision id .........................................................................80 3.2.40 at+vtd tone duration ............................................................................................81 3.2.41 at+vts dtmf and tone generation ......................................................................81 3.2.42 at+cmux multiplexer control ...............................................................................82 3.2.43 at+cnum subscriber number ................................................................................84 3.2.44 at+cpol preferred operator list ............................................................................84 3.2.45 at+copn read operator names .............................................................................85 3.2.46 at+cfun set phone functionality ..........................................................................86 3.2.47 at+cclk clock .......................................................................................................87 3.2.48 at+csim generic sim access ................................................................................87 3.2.49 at+calm alert sound mode ..................................................................................88 3.2.50 at+cals alert sound select ...................................................................................89 3.2.51 at+crsl ringer sound level .................................................................................89 3.2.52 at+clvl loud speaker volume level ...................................................................90 3.2.53 at+cmut mute control ..........................................................................................91 3.2.54 at+cpuc price per unit and currency table ..........................................................91 3.2.55 at+ccwe call meter maximum event ..................................................................92 3.2.56 at+cbc battery charge ...........................................................................................93 3.2.57 at+cusd unstructured supplementary service data .............................................94 3.2.58 at+cssn supplementary services notification ......................................................95 4 at commands according to gsm07.05 .....................................................................................97 4.1 overview of at commands according to gsm07.05 ..........................................................97 4.2 detailed descriptions of at commands according to gsm07.05 .......................................97 4.2.1 at+cmgd de lete sms message ...............................................................................97 4.2.2 at+cmgf select sms message format ...................................................................98 4.2.3 at+cmgl list sms messages from preferred store ................................................99 4.2.4 at+cmgr read sms message ...............................................................................102 http://www..net/ datasheet pdf - http://www..net/ smart machine smart decision SIM900_at command manual_v1.05 7 2011.10.24 4.2.5 at+cmgs send sms message ................................................................................105 4.2.6 at+cmgw write sms message to memory ..........................................................106 4.2.7 at+cmss send sms message from storage ..........................................................107 4.2.8 at+cnmi new sms message indications ..............................................................108 4.2.9 at+cpms preferred sms message storage ............................................................ 111 4.2.10 at+cres restore sms settings ............................................................................ 112 4.2.11 at+csas save sms settings ................................................................................ 112 4.2.12 at+csca sms service center address ................................................................ 113 4.2.13 at+cscb select cell broadcast sms messages ................................................... 114 4.2.14 at+csdh show sms text mode parameters ....................................................... 115 4.2.15 at+csmp set sms text mode parameters ........................................................... 116 4.2.16 at+csms sele ct message service ......................................................................... 117 5 at commands for sim application toolkit .............................................................................119 5.1 stk at command .............................................................................................................. 119 6 at commands special for simcom ........................................................................................121 6.1 overview .............................................................................................................................12 1 6.2 detailed descriptions of commands ...................................................................................122 6.2.1 at+sidet change the side tone gain level.......................................................122 6.2.2 at+cpowd power off ...........................................................................................123 6.2.3 at+spic times remain ed to input sim pin/puk .................................................123 6.2.4 at+cmic change the microphone gain level .......................................................124 6.2.5 at+cala set alarm time ......................................................................................125 6.2.6 at+cald delete alarm ..........................................................................................126 6.2.7 at+cadc read adc .............................................................................................126 6.2.8 at+csns single numbering scheme .....................................................................127 6.2.9 at+cdscb reset cell broadcast ............................................................................127 6.2.10 at+cmod configure alternating mode calls .....................................................128 6.2.11 at+cfgri indicate ri when using urc ............................................................128 6.2.12 at+clts get local timestamp ............................................................................129 6.2.13 at+cexths external headset jack control ........................................................130 6.2.14 at+cextbut headset button status reporting .................................................131 6.2.15 at+csmins sim in serted status reporting .........................................................132 6.2.16 at+cldtmf local dtmf tone generation .......................................................133 6.2.17 at+cdrind cs voice/da ta call termination indication ...................................133 6.2.18 at+cspn get service provider name from sim ..................................................134 6.2.19 at+ccvm get and set the voice mail number on the sim .................................135 6.2.20 at+cband get and set mobile operation band .................................................135 6.2.21 at+chf configure hands free operation .............................................................136 6.2.22 at+chfa swap the audio channels .....................................................................137 6.2.23 at+csclk configure slow clock ........................................................................137 6.2.24 at+ceng switch on or off engineering mode ...................................................138 6.2.25 at+sclass0 store class 0 sms to sim when received class 0 sms ..............140 6.2.26 at+ccid show iccid ..........................................................................................141 6.2.27 at+cmte set critical temperature operating mode or query temperature ......141 http://www..net/ datasheet pdf - http://www..net/ smart machine smart decision SIM900_at command manual_v1.05 8 2011.10.24 6.2.28 at+cbte battery temperature query ...................................................................141 6.2.29 at+csdt switch on or off detecting sim card .................................................142 6.2.30 at+cmgda delete all sms ................................................................................142 6.2.31 at+sttone play sim toolkit tone ....................................................................143 6.2.32 at+simtone gene rate specifically tone ...........................................................144 6.2.33 at+ccpd enable or disable alpha string ............................................................145 6.2.34 at+cgid get sim card group identifier .............................................................145 6.2.35 at+moring show state of mobile originated call ............................................146 6.2.36 at+cmghex enable or disa ble sending non-ascii character sms ...............146 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 chan ge ps super password ............................................................148 6.2.40 at+exunsol enable or disable proprietary unsolicited indications .................149 6.2.41 at+cgmsclass change gprs multislot class ................................................149 6.2.42 at+cdevice view current flash device type ..................................................150 6.2.43 at+ccalr call ready query ..............................................................................150 6.2.44 at+gsv display produ ct identification information .............................................151 6.2.45 at+sgpio control the gpio .................................................................................151 6.2.46 at+spwm generate the pulse-width-modulation ................................................152 6.2.47 at+echo echo cancellation control ...................................................................153 6.2.48 at+caas control auto audio switch ..................................................................154 6.2.49 at+svr configure voice coding type for voice calls .........................................155 6.2.50 at+gsmbusy reject incoming call ....................................................................156 6.2.51 at+cemnl set the list of emergency number ...................................................156 6.2.52 at*celllock set the list of arfcn which ne eds to be locked ...................157 6.2.53 at+sleds set the timer period of net light .......................................................158 6.2.54 at+cchgmode indicates if the module is powered off ....................................159 6.2.55 at+cbuzzerring use the buzzer sound as the incoming call ring ...............159 6.2.56 at+cexterntone close or open the microphone ...........................................159 6.2.57 at+cnetlight close the ne t light or open it to shining ................................160 6.2.58 at+cwhitelist set the white list ....................................................................160 6.2.59 at+cusacc accelerate uart response speed .....................................................161 7 at commands for gprs support.............................................................................................163 7.1 overview of at commands for gprs support ..................................................................163 7.2 detailed descriptions of at commands for gprs support...............................................163 7.2.1 at+cgatt attach or detach from gprs service ..................................................163 7.2.2 at+cgdcont define pdp context .......................................................................164 7.2.3 at+cgqmin quality of serv ice profile (minimum acceptable) ...........................166 7.2.4 at+cgqreq quality of service profile (requested) .............................................167 7.2.5 at+cgact pdp context activate or deactivate ....................................................169 7.2.6 at+cgdata enter data state .................................................................................169 7.2.7 at+cgpaddr show pdp address .........................................................................170 7.2.8 at+cgclass gprs mobile station class .............................................................171 7.2.9 at+cgerep control unsolicited gprs event reporting ......................................172 http://www..net/ datasheet pdf - http://www..net/ smart machine smart decision SIM900_at command manual_v1.05 9 2011.10.24 7.2.10 at+cgreg network registration status ..............................................................173 7.2.11 at+cgsms select service for mo sms messages ..............................................174 8 at commands for tcpip application toolkit .........................................................................176 8.1 overview .............................................................................................................................17 6 8.2 detailed descriptions of commands ...................................................................................177 8.2.1 at+cipmux start up multi-ip connection ............................................................177 8.2.2 at+cipstart start up tcp or udp connection ...................................................177 8.2.3 at+cipsend send data through tcp or udp connection ...................................179 8.2.4 at+cipqsend select data transmitting mode .....................................................181 8.2.5 at+cipack query previous connection data transmitting state ..........................182 8.2.6 at+cipclose close tcp or udp connection .....................................................183 8.2.7 at+cipshut deactivate gprs pdp context ........................................................183 8.2.8 at+clport set local port .....................................................................................184 8.2.9 at+cstt start task and set apn, user name, password ...........................184 8.2.10 at+ciicr bring up wireless connection with gprs or csd .............................185 8.2.11 at+cifsr get local ip address ............................................................................186 8.2.12 at+cipstatus query current connection status ...............................................186 8.2.13 at+cdnscfg configure domain name server...................................................188 8.2.14 at+cdnsgip query the ip address of given domain name ...............................188 8.2.15 at+ciphead add an ip head at the beginning of a package received ..............189 8.2.16 at+cipats set auto sending timer .....................................................................190 8.2.17 at+cipsprt set prompt of ?>? when module sends data ...................................191 8.2.18 at+cipserver configure module as server ......................................................191 8.2.19 at+cipcsgp set csd or gprs for connection mode ........................................192 8.2.20 at+cipsrip show remote ip address and port when received data ................193 8.2.21 at+cipdpdp set whether to check state of gprs network timing ..................194 8.2.22 at+cipmode select tcpip application mode ....................................................195 8.2.23at+cipccfg configure transparent transfer mode ............................................195 8.2.24 at+cipshowtp display transfer protocol in ip head when received data .....196 8.2.25 at+cipudpmode udp extended mode .............................................................197 8.2.26 at+ciprxget get data from network manually ...............................................198 8.2.27 at+cipqrclose quick remote close ...............................................................199 8.2.28 at+cipscont save tcpip application context .................................................199 8.2.29 at+ciptxiss discard input at data in tcp data send ......................................200 9 at commands for ip application .............................................................................................202 9.1 overview .............................................................................................................................20 2 9.2 detailed descriptions of commands ...................................................................................202 9.2.1 at+sapbr bearer settings for applications based on ip.......................................202 10 at commands for http application .....................................................................................204 10.1 overview ...........................................................................................................................204 10.2 detailed descriptions of commands .................................................................................204 10.2.1 at+httpinit initialize http service .................................................................204 10.2.2 at+httpterm terminate http service ............................................................204 10.2.3 at+httppara set http parameters value ........................................................205 http://www..net/ datasheet pdf - http://www..net/ smart machine smart decision SIM900_at command manual_v1.05 10 2011.10.24 10.2.4 at+httpdata input http data .........................................................................207 10.2.5 at+httpaction http method action .............................................................207 10.2.6 at+httpread read the http server response ................................................209 10.2.7 at+httpscont save http application context ..............................................210 11 at commands for ftp application ........................................................................................212 11.1 overview ...........................................................................................................................212 11.2 detailed descriptions of commands .................................................................................212 11.2.1 at+ftpport set ftp control port .......................................................................212 11.2.2 at+ftpmode set active or passive ftp mode ...................................................213 11.2.3 at+ftptype set the type of data to be transferred ...........................................214 11.2.4 at+ftpputopt set ftp put type .......................................................................214 11.2.5 at+ftpcid set ftp bearer profile identifier .......................................................215 11.2.6 at+ftprest set resume broken download .......................................................215 11.2.7 at+ftpserv set ftp server address ..................................................................216 11.2.8 at+ftpun set ftp user name ............................................................................217 11.2.9 at+ftppw set ftp password ...............................................................................217 11.2.10 at+ftpgetname set download file name ....................................................218 11.2.11 at+ftpgetpath set download file path .........................................................218 11.2.12 at+ftpputname set upload file name .........................................................219 11.2.13 at+ftpputpath set upload file path ..............................................................220 11.2.14 at+ftpget download file .................................................................................220 11.2.15 at+ftpput set upload file ................................................................................221 11.2.16 at+ftpscont save ftp application context ..................................................222 11.2.17 at+ftpdele delete sp ecified file in ftp server .............................................223 11.2.18 at+ftpsize get the size of specified file in ftp server ..................................224 11.2.19 at+ftpstate get the ftp state ........................................................................224 12 supported unsolicited result codes ........................................................................................226 12.1 summary of cme error codes ....................................................................................226 12.2 summary of cms error codes ....................................................................................227 13 at commands sample ............................................................................................................230 13.1 profile commands .............................................................................................................230 13.2 sim commands ................................................................................................................231 13.3 general commands ...........................................................................................................232 13.4 call control commands ....................................................................................................233 13.5 sim toolkit commands ....................................................................................................235 13.6 audio commands ..............................................................................................................235 13.7 sms commands ...............................................................................................................235 13.8 gprs commands .............................................................................................................237 http://www..net/ datasheet pdf - http://www..net/ smart machine smart decision SIM900_at command manual_v1.05 11 2011.10.24 1 introduction 1.1 scope of the document this document presents the at command set for simcom SIM900 series cellular engine. 1.2 related documents you can visit the simcom website using the following link: http://www.sim.com http://www..net/ datasheet pdf - http://www..net/ smart machine smart decision SIM900_at command manual_v1.05 12 2011.10.24 1.3 conventions and abbreviations in this document, the gsm engines are referred to as following term: 1) me (mobile equipment); 2) ms (mobile station); 3) ta (terminal adapter); 4) dce (data communication equipment) or facsimile dce (fax modem, fax board); in application, controlling device controls the gsm engine by sending at command via its serial interface. the controlling device at the other end of the serial line is referred to as following term: 1) te (terminal equipment); 2) dte (data terminal equipment) or plainly "the application" which is running on an embedded system; 1.4 at command syntax the "at" or "at" prefix must be set at the beginning of each command line. to terminate a command line enter smart machine smart decision SIM900_at command manual_v1.05 13 2011.10.24 1.4.2 s parameter syntax these at commands have the format of " ats smart machine smart decision SIM900_at command manual_v1.05 14 2011.10.24 ? gsm format ? ucs2 ? hex ? ira ? pccp ? pcdn ? 8859-1 the character set can be set and interrogated using the " at+cscs " command (gsm 07.07). the character set is defined in gsm specification 07.05. the character set affects transmission and recept ion of sms and sms cell broadcast messages, the entry and display of phone book entries text field and sim application toolkit alpha strings. 1.6 flow control flow control is very important for correct communication between the gsm engine and dte. for in the case such as a data or fax call, the sending device is transferring data faster than the receiving side is ready to accept. when the receiving buffer reaches its capacity, the receiving device should be capable to cause the sending device to pause until it catches up. there are basically two approach es to achieve data flow cont rol: software flow control and hardware flow control. SIM900 support both two kinds of flow control. in multiplex mode, it is recommended to use the hardware flow control. 1.6.1 software flow control (xon/xoff flow control) software flow control sends different character s to stop (xoff, decimal 19) and resume (xon, decimal 17) data flow. it is quite useful in some applications that only use three wires on the serial interface. the default flow control approach of SIM900 is hardware flow control (rts/cts flow control), to enable software flow control in the dte interface and within gsm engine, type the following at command: at+ifc=1, 1 this setting is stored volatile, for use after restart, at+ifc=1, 1 should be stored to the user profile with at&w . note: the at commands listed in the table of at&w chapter should be stored to user profile with at&w for use after restart. most other at commands in v.25, 07.05, 07.07, gprs will store parameters automatically and can be used after module restart. ensure that any communications software packag e (e.g. hyper terminal) uses software flow control. note: software flow control should not be used for data calls where binary data will be transmitted or http://www..net/ datasheet pdf - http://www..net/ smart machine smart decision SIM900_at command manual_v1.05 15 2011.10.24 received (e.g. tcp/ip) as the dte interface may interpret binary data as flow control characters. 1.6.2 hardware flow control (rts/cts flow control) hardware flow cont rol achieves the data flow control by controlling the rts/cts line. when the data transfer should be suspended, the cts line is set inactive until the transfer from the receiving buffer has completed. when the receiving buffer is ok to receive more data, cts goes active once again. to achieve hardware flow control, ensure that the rts/cts lines are present on your application platform. http://www..net/ datasheet pdf - http://www..net/ smart machine smart decision SIM900_at command manual_v1.05 16 2011.10.24 2 at commands according to v.25ter these at commands are designed according to the itu-t (international telecommunication union, telecommunication sector) v.25ter document. 2.1 overview of at commands according to v.25ter command description a/ re-issues the last command given ata answer an incoming call at d mobile originated call to dial a number atd> smart machine smart decision SIM900_at command manual_v1.05 17 2011.10.24 progress atz reset default configuration at & c set dcd function mode at & d set dtr function mode at & f factory defined configuration at & v display current configuration at & w store active profile at + g c a p request complete ta capabilities list at + g m i request manufacturer identification at+gmm request ta model identification at + g m r request ta revision identification of software release at+goi request global object identification at + g s n request ta serial number identification (imei) at + i c f set te-ta control character framing at + i f c set te-ta local data flow control at + i p r set te-ta fixed local rate at+hvoic disconnect voice call only 2.2 detailed description of at commands according to v.25ter 2.2.1 a/ re-issues the last command given a/ re-issues the last command given execution command a/ response re-issues the previous command reference v.25ter note 2.2.2 ata answer an incoming call ata answer an incoming call execution command ata response ta sends off-hook to the remote station. note1: any additional commands on the same command line are ignored. note2: this command may be aborted generally by receiving a character during execution. the aborting is not possible during some states of connection establishment such as handshaking. response in case of data call, if successfully connected connect smart machine smart decision SIM900_at command manual_v1.05 18 2011.10.24 note: smart machine smart decision SIM900_at command manual_v1.05 19 2011.10.24 when ta returns to command mode after call release ok if connection successful and voice call ok parameters smart machine smart decision SIM900_at command manual_v1.05 20 2011.10.24 z the current states of all calls can be easily checked at any time by using the at+clcc command. 2.2.4 atd> smart machine smart decision SIM900_at command manual_v1.05 21 2011.10.24 i override the clir supplementary service subscription default value for this call invocation (restrict cli presentation) i override the clir supp lementary service subscription default value for this call suppression (allow cli presentation) smart machine smart decision SIM900_at command manual_v1.05 22 2011.10.24 no carrier if the remote station does not answer no answer if connection successful and non-voice call. connect smart machine smart decision SIM900_at command manual_v1.05 23 2011.10.24 during some states of connection establishment such as handshaking. if error is related to me functionality +cme error: smart machine smart decision SIM900_at command manual_v1.05 24 2011.10.24 reference v.25ter note 2.2.8 ath disconnect existing connection ath disconnect existing connection response disconnect existing call by local te from command line and terminate call ok note: ok is issued after circuit 109(dcd) is turned off, if it was previously on. execution command ath[n] parameter smart machine smart decision SIM900_at command manual_v1.05 25 2011.10.24 SIM900 r11.0 ok reference v.25ter note 2.2.10 atl set mo nitor speaker loudness atl set monitor speaker loudness response ok execution command atl smart machine smart decision SIM900_at command manual_v1.05 26 2011.10.24 v.25ter to return from command mode back to data mode: enter ato . 2.2.13 ato switch from command mode to data mode ato switch from comma nd mode to data mode response ta resumes the connection and switches back from command mode to data mode. connect if connection is not successfully resumed no carrier else ta returns to data mode from command mode connect smart machine smart decision SIM900_at command manual_v1.05 27 2011.10.24 reference v.25ter note 2.2.16 ats0 set number of rings be fore automatically answering the call ats0 set number of rings before automatically answering the call response smart machine smart decision SIM900_at command manual_v1.05 28 2011.10.24 reference v.25ter note default 13 = cr. it only supports default value. 2.2.18 ats4 set response formatting character ats4 set response formatting character response smart machine smart decision SIM900_at command manual_v1.05 29 2011.10.24 reference v.25ter note default 8 = backspace. 2.2.20 ats6 pause be fore blind dialling ats6 pause before blind dialling read command ats6? response error response ok error write command ats6= smart machine smart decision SIM900_at command manual_v1.05 30 2011.10.24 2.2.22 ats8 set number of seconds to wait for comma dial modifier encountered in dial string of d command ats8 set number of seconds to wait for comma dial modifier encountered in dial string of d command response smart machine smart decision SIM900_at command manual_v1.05 31 2011.10.24 2.2.24 att select tone dialing att select tone dialing execution command att response ok reference v.25ter note no effect in gsm 2.2.25 atv ta response format atv ta response format response this parameter setting determines the contents of the header and trailer transmitted with result codes and information responses. when smart machine smart decision SIM900_at command manual_v1.05 32 2011.10.24 no answer 8 "@" (wait for quiet answer) dial modifier was used, but remote ringing followed by five seconds of silence was not detected before expiration of the connection timer (s7) proceeding 9 an at command is being processed connect smart machine smart decision SIM900_at command manual_v1.05 33 2011.10.24 1 restore profile 1 reference v.25ter note parameter impacted by z command: command parameter name default value ate |