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SIM900R at commands_v1.01 http://
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 2 2011.06.22 document title: SIM900R at commands version: 1.01 date: 2011-06-22 status: release document control id: SIM900R_at command manual_v1.01 general note s simco m offers this inf o rm ation as a service t o i t s cust om ers, to su pp ort a p pli cat io n a nd eng i n eerin g ef forts t h at us e t h e pro duc ts d e sig n ed by simcom . the i n form ation pr ovi de d is base d up on re qu ire m ents spec ifi cally prov id e d t o simco m by the c u stom ers. sim c om has not un derta k e n a n y ind e pe nd en t search for a d dit i o n al rele va nt inform ation , in cl ud in g a n y inform ation tha t m ay be in t h e cus t om er?s p o ssessio n . furtherm ore, sy stem vali dati on of t h is pr o duc t des i g n ed by simco m withi n a l a rge r electr o nic s y ste m re m a ins the res p o n si bil ity of t h e c u stom er or the cust om er?s syste m inte grat or. all specifi c a ti ons s u ppli e d herei n are subj ect t o c h ange. co py rig h t this d o c u m e nt c ont ai ns p r oprie tary tec hni cal inform ati on w h i c h i s the pro p ert y of shangh a i simco m wireless s o l u ti on s lt d, co py in g of th is do cum e nt a n d gi v i n g it t o ot hers and the us in g or com m unicati o n of t h e c o nt ents there o f, are forb i d den without express aut hori t y. offenders are liable t o t h e paym ent of d a m ages. a l l r i gh ts reser v ed in t h e ev en t of gra n t of a pat ent or th e registra ti on of a ut il ity m odel or desi gn . a ll sp ecif i ca ti on su ppl ie d h e rein are su bj ect t o c h a n g e without noti ce at any t i m e . cop y right ? shanghai simcom wire le ss soluti ons ltd. 20 11
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 3 2011.06.22 version history version chapter what is new v1.01 origin
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 4 2011.06.22 contents version his t ory ................................................................................................................ ................. 3 ? 1 intr oduction ................................................................................................................. ................. 11 ? 1.1 scope of the doc um ent ...................................................................................................... .... 1 1 ? 1.2 re lated docum e nts .......................................................................................................... ...... 1 1 ? 1.3 conventions an d abbreviations ............................................................................................. 1 2 ? 1.4 a t com m and synta x .......................................................................................................... ... 12 ? 1.4.1 basic synta x ............................................................................................................. ...... 12 ? 1.4.2 s param e ter syntax ....................................................................................................... .. 13 ? 1.4.3 e x tende d synta x .......................................................................................................... ... 13 ? 1.4.4 com b ining at com m a nds on the sa m e co m m a nd line ................................................. 13 ? 1.4.5 e n tering succ essive a t com m a nds on se para te lines ..................................................... 13 ? 1.5 supported ch ara c ter sets ................................................................................................... ..... 13 ? 1.6 flow c o ntrol ............................................................................................................... ........... 14 ? 1.6.1 sof t ware flow contro l (xon/xoff flow control) ......................................................... 14 ? 1.6.2 hardwar e flow c o ntrol (r ts/cts flow control) ............................................................ 15 ? 2 at c o m m a nds acc o rding to v.25ter ....................................................................................... 16 ? 2.1 overview of a t com m a nds acc o rding to v . 25ter ............................................................ 16 ? 2.2 deta ile d description of a t com m a nds according to v .25ter ........................................... 17 ? 2.2.1 a/ r e -issues the last com m a nd given ....................................................................... 17 ? 2.2.2 a t a a n swer an i n com i ng ca ll .................................................................................... 17 ? 2.2.3 a t d mobile originate d ca ll to dial a num b er .......................................................... 18 ? 2.2.4 a t d>< n > originate call to phone nu m b er in c u rrent mem o ry ................................ 20 ? 2.2. 5 a t d> ori g i n at e ca ll to p h o n e num b er in mem o ry whic h c o rrespo nds to fi el d .......................................................................................................................... .............. 21 ? 2.2.6 a t dl redial last t e lephone num b er used ............................................................... 22 ? 2.2.7 a t e s e t c o m m a nd echo mode .................................................................................. 23 ? 2.2.8 a t h disconnec t e x isting c o nne c tion ......................................................................... 24 ? 2.2.9 a t i display product id entific a tion inform ation ......................................................... 24 ? 2.2.10 a t l set monito r s p ea ker lo udness............................................................................ 25 ? 2.2. 1 1 a t m set moni tor s p ea ker mode .............................................................................. 25 ? 2.2.12 ++ + switch from data mode or ppp online mode to c o m m and mode .................. 25 ? 2.2.13 a t o switch from com m a nd mode to da ta mode .................................................... 26 ? 2.2.14 a t p select pulse dialling.......................................................................................... 26 ? 2.2.15 a t q set res u lt co de prese n ta tion mode .................................................................. 26 ? 2.2.16 a ts0 set num b er of rings befo r e autom a tically answering the call ..................... 27 ? 2.2.17 a t s3 set c o m m a nd line t e rm ination char acter ..................................................... 27 ? 2.2.18 a t s4 set r e spons e form atting charac ter ................................................................ 28 ? 2.2.19 a t s5 set c o m m a nd line e d iting chara c ter ............................................................. 28 ? 2.2.20 a t s6 pause be fore blind dialling ............................................................................ 29 ? 2.2.21 a t s7 set num b er of seconds to w a it for connection com p letion .......................... 29 ? 2.2 . 2 2 a t s8 set n u m b er of seco nds to w a it for com m a d i al mo di fier enc o u n t e red i n d i al
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 5 2011.06.22 s t ring of d c o m m and ............................................................................................................ .3 0 ? 2.2.23 a t s10 set disconnec t delay after indicating the abse nce of data c a rrier.............. 30 ? 2.2.24 a t t select t o ne dialing ........................................................................................... 31 ? 2.2.25 atv ta response form at ....................................................................................... 31 ? 2.2.26 a t x set connect res u lt code form at and monitor call progress ..................... 32 ? 2.2.27 a tz reset defa ult configura t ion ............................................................................. 32 ? 2.2.28 a t &c set dcd func tion mode ............................................................................... 33 ? 2.2.29 a t &d set dt r function mode ................................................................................ 33 ? 2.2.30 a t &f factory de fined configura tion ...................................................................... 34 ? 2.2.31 a t &v display c u rrent c onfigur ation ...................................................................... 36 ? 2.2.32 a t &w stor e active profile ...................................................................................... 36 ? 2.2.33 a t +gcap r e que s t com p lete t a capabilities list .................................................. 37 ? 2.2.34 a t +gmi r e quest manu fac t urer identific a tion ......................................................... 37 ? 2.2.35 a t +gmm re ques t t a mode l identifica tion ............................................................ 37 ? 2.2.36 a t +gmr re quest t a revision i d entification of so ftware re lease ......................... 38 ? 2.2.37 a t +goi reques t globa l objec t identification ......................................................... 38 ? 2.2.38 a t +gsn re quest t a serial num b er ide n tifica tion (imei) ..................................... 39 ? 2.2.39 a t +ic f set te-t a control c h ar acter fram ing........................................................ 39 ? 2.2.40 a t +ifc se t te-t a loca l data flow control .......................................................... 40 ? 2.2.41 a t +ipr se t te- t a fixed l o ca l rate ....................................................................... 41 ? 2.2.42 a t +hvoic disconnect v o ice call only .................................................................. 42 ? 3 at c o m m a nds acc o rd ing to gsm07.07 ..................................................................................... 43 ? 3.1 overview of a t com m a nd acc o rding to gsm07. 07 ........................................................... 43 ? 3.2 deta ile d descriptions of a t com m a nd according to gsm07.07 ........................................ 44 ? 3.2.1 a t + c acm accum u la ted ca ll meter (acm) r e set or query .................................... 44 ? 3.2.2 a t + c amm acc u m u la ted ca ll meter maxim u m (acm m a x) set or query ............. 45 ? 3.2.3 a t + c aoc advic e of char ge ..................................................................................... 46 ? 3.2.4 a t + c b s t select b earer service t y pe ........................................................................ 47 ? 3.2.5 a t + c c f c c a ll forwarding nu m b er a nd conditio ns c o ntrol .................................... 48 ? 3.2.6 a t + c c w a ca ll w a iting control ................................................................................ 49 ? 3.2.7a t+ cee r e x tend ed error report ............................................................................... 51 ? 3.2.8 a t + c gmi r e quest manu fac t urer identific a tion ........................................................ 53 ? 3.2.9 a t + c gmm re ques t mode l identification.................................................................. 53 ? 3.2.10 a t +c gmr reque s t t a revision id e n tifica tion of sof t ware rele ase ...................... 54 ? 3.2 . 1 1 a t + c g s n req u es t produc t seria l n u m b er iden t i ficatio n (ide n tical w i t h +g sn ) ... 54 ? 3.2.12 a t +cs c s select t e char acter set ........................................................................... 54 ? 3.2.13 a t +cs t a selec t t y pe of addres s ............................................................................ 55 ? 3.2.14 a t +c hld call h o ld and multiparty ........................................................................ 56 ? 3.2.15 a t +ci m i r e quest interna t io nal mobile subs c r iber ide n tity .................................... 57 ? 3.2.16 a t +cl cc list cur r ent c a lls of me......................................................................... 58 ? 3.2.17 a t +cl c k fac ility lock ........................................................................................... 59 ? 3.2.18 a t +cl i p c a lling l i ne i d e n tification pr esentation ................................................... 61 ? 3.2.19 a t +cl i r c a lling l i ne i d e n tification re s t riction ..................................................... 62 ? 3.2.20 a t +c mee re port mobile e q uipm ent error............................................................. 63 ?
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 6 2011.06.22 3.2.21 a t +c olp c o nne c te d line i d entific ation presentation ............................................ 64 ? 3.2.22 a t +c ops oper ator sele ction ................................................................................... 65 ? 3.2.23 a t +cp a s phon e activity s t atus ............................................................................... 67 ? 3.2.24 a t +cp b f find phone book entries........................................................................... 67 ? 3.2.25 a t +cp br re ad current phone book e n tries ............................................................ 68 ? 3.2.26 a t +cp b s select ph onebook me m o ry s t orage ......................................................... 69 ? 3.2.27 a t +cp b w w r ite p h onebook e n try .......................................................................... 70 ? 3.2.28 a t +cp i n enter pin .................................................................................................. 71 ? 3.2.29 a t +cp w d change password ................................................................................... 72 ? 3.2.30 a t +cr service re porting c ontr o l ........................................................................... 73 ? 3.2.31 a t +cr c se t c e llular result codes for inc o m i ng ca ll i ndica tion ........................... 74 ? 3.2.32 a t +cr e g netw ork regist ration .............................................................................. 75 ? 3.2.33 a t +cr l p se lec t r a dio link protocol param e ters ................................................... 76 ? 3.2.34 a t +cr s m r e stric t ed sim acces s ........................................................................... 77 ? 3.2.35 a t +cs q signal quality report ................................................................................ 78 ? 3.2.36 a t +fc l ass f ax: selec t , r e a d or t e s t servic e class ............................................ 79 ? 3.2.37 a t +f mi f ax: re port ma nufac tured id ................................................................... 79 ? 3.2.38 a t +f mm f ax: report model id ............................................................................ 80 ? 3.2.39 a t +f mr f ax: r e port re vision id ......................................................................... 80 ? 3.2.40 a t +vt d t o ne duration............................................................................................ 81 ? 3.2.41 a t +vt s dtmf a n d t o ne generation ...................................................................... 81 ? 3.2.42 a t +c mux mul tiple xer c o ntrol ............................................................................... 82 ? 3.2.43 a t +c num subs c r iber num b er ................................................................................ 84 ? 3.2.44 a t +cp o l preferre d opera t or l i s t ............................................................................ 84 ? 3.2.45 a t +c opn read operator nam e s ............................................................................. 85 ? 3.2.46 a t +cf un set p hone functiona l ity .......................................................................... 86 ? 3.2.47 a t +cc l k cloc k ....................................................................................................... 87 ? 3.2.48 a t +cs i m ge neric sim access ................................................................................ 87 ? 3.2.49 a t +c alm alert sound mode .................................................................................. 88 ? 3.2.50 a t +c als alert sound se lec t ................................................................................... 89 ? 3.2.51 a t +cr s l ringer s o und l e vel ................................................................................. 89 ? 3.2.52 a t +cl v l l o ud speaker v o lum e leve l ................................................................... 90 ? 3.2.53 a t +c mut mute control .......................................................................................... 91 ? 3.2.54 a t +cp u c price pe r unit a n d cur r ency t a ble .......................................................... 91 ? 3.2.55 a t +cc w e c a ll me ter ma xim u m event .................................................................. 92 ? 3.2.56 a t +cb c battery c h ar ge ........................................................................................... 93 ? 3.2.57 a t +c usd unstructure d supple m e ntary se rvice data ............................................. 94 ? 3.2.58 a t +cs s n supplem e ntar y service s notific ation ...................................................... 95 ? 4 at c o m m a nds acc o rd ing to gsm07.05 ..................................................................................... 97 ? 4.1 overview of a t com m a nds acc o rding to gsm07. 05 .......................................................... 97 ? 4.2 deta ile d descriptions of a t com m a nds according to gsm07.05 ....................................... 97 ? 4.2.1 a t + c mgd dele te sms message............................................................................... 97 ? 4.2.2 a t + c mgf selec t s m s messa ge form at ................................................................... 98 ? 4.2.3 a t + c mgl l i st sms messa ges fro m preferred s t ore ................................................ 99 ?
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 7 2011.06.22 4.2.4 a t + c mgr r ead sms messa ge ............................................................................... 102 ? 4.2.5 a t + c mgs send sms messa ge ................................................................................ 105 ? 4.2.6 a t + c mgw w r ite sms messa ge to mem o ry .......................................................... 106 ? 4.2.7 a t + c mss send sms message from s t orage .......................................................... 107 ? 4.2.8 a t + c nmi new sms message indic a tions .............................................................. 108 ? 4.2.9 a t + c pms preferre d sms mess a g e s t orage ............................................................ 1 1 1 ? 4.2.10 a t +cr e s res t ore sms settings ............................................................................ 1 1 2 ? 4.2. 1 1 a t + c sas sa ve s m s settings ................................................................................ 1 1 2 ? 4.2.12 a t +cs c a sms se rvice ce nter a ddress ................................................................ 1 1 3 ? 4.2.13 a t +cs cb sele ct c e ll broa dcas t sms message s ................................................... 1 1 4 ? 4.2.14 a t +cs dh show sms t e xt mode param e ters ....................................................... 1 1 5 ? 4.2.15 a t +cs m p set sms t e xt mode para m e ters ........................................................... 1 1 6 ? 4.2.16 a t +cs m s selec t message service ......................................................................... 1 1 7 ? 5 at c o m m a nds for sim a pplica t ion toolkit ............................................................................. 119 ? 5.1 stk a t c o m m and ............................................................................................................. .1 1 9 ? 5 at c o m m a nds for sim a pplica t ion toolkit ............................................................................. 120 ? 5.1 stk a t c o m m and ............................................................................................................. .1 2 0 ? 6 at c o m m a nds special f o r simcom ........................................................................................ 122 ? 6.1 overview ................................................................................................................... .......... 122 ? 6.2 deta ile d descriptions of com m a nds................................................................................... 123 ? 6.2.1 at+sidet c h ange the side tone gain l e vel ....................................................... 123 ? 6.2.2 at+ c powd power off ........................................................................................... 124 ? 6.2.3 at+spic t i m e s rem a ined to i n put sim pin/puk ................................................. 124 ? 6.2.4 at+ c mic c h a nge the mi crophone gain le vel ....................................................... 125 ? 6.2.5 at+ c ala se t alarm ti m e ...................................................................................... 126 ? 6.2.6 at+ c ald dele te alarm .......................................................................................... 127 ? 6.2.7 at+ c adc r ead adc ............................................................................................. 127 ? 6.2.8 at+ c sns single n u m b ering sc he m e ..................................................................... 128 ? 6.2.9 at+ c dscb reset cell broa dc as t ............................................................................ 128 ? 6.2.10 at+c mod configure alternating mo de calls ..................................................... 128 ? 6.2.11 at+c fgri indica te ri w h en using urc ............................................................ 129 ? 6.2.12 at+c lts get local t i m e sta m p ............................................................................ 129 ? 6.2.13 at+c exths external heads e t jack control ........................................................ 131 ? 6.2.14 at+c extbut headse t b u tton status re porting ................................................. 132 ? 6.2.15 at+c smins sim insert e d sta t us reporting ......................................................... 133 ? 6.2.16 at+c ldtmf l o cal dt mf t o ne ge neration ....................................................... 134 ? 6.2.17 at+c drind cs voice / data c a ll t e rm ination indic a tion ................................... 134 ? 6.2.18 a t +cs p n get service provider n a m e fro m sim .................................................. 135 ? 6.2.19 a t +cc v m get and set the v o ice mail num b er on the sim ................................. 135 ? 6.2.20 a t +cband get and set mobile operation band ................................................. 136 ? 6.2.21 a t +c hf configure hands free operation ............................................................. 137 ? 6.2.22 a t +c hf a swap the audio cha nne ls ..................................................................... 138 ? 6.2.23 a t +cs c lk c onf igure slow clock ........................................................................ 138 ? 6.2.24 a t +ce ng switch on or off engine er ing mode ................................................... 139 ?
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 8 2011.06.22 6.2.25 a t +sc l ass0 s t or e class 0 sms to sim w h e n re ceive d c l ass 0 sms .............. 141 ? 6.2.26 a t +cc i d show ic cid .......................................................................................... 141 ? 6.2.27 at+c mte set critic al tem p erature op erati n g mode or que r y te m p erature ...... 142 ? 6.2.28 a t +cb te battery te m p erature query ................................................................... 142 ? 6.2.29 at+csdt switch on or off detecting sim c a rd ................................................. 143 ? 6.2.30 at+cmgda de lete all sms ................................................................................ 143 ? 6.2.31 at+st t one play sim toolkit t one .................................................................... 144 ? 6.2.32 at+simtone ge nera te spe c ifically t o ne ........................................................... 145 ? 6.2.33 at+c cpd enable or disable alpha string ............................................................ 145 ? 6.2.34 at+cgid get sim ca rd group ide n tifier ............................................................. 146 ? 6.2.35 at+moring show state of mobile origina t e d ca ll............................................ 146 ? 6.2.36 at+cmghex enable or dis a ble sending non-ascii character sms ............... 147 ? 6.2.37 at+c code conf i gure sms code mode .............................................................. 148 ? 6.2.38 at+ci u rc e n a b le or disa ble i n itial urc pres entation ....................................... 148 ? 6.2.39 at+cpspwd change ps super pa ssword ............................................................ 149 ? 6.2.40 a t +ex unsol enable or dis a ble proprie tary unsolicited i n dic a tions ................. 150 ? 6.2.41 at+c gmsclass change gpr s multislot class ................................................ 150 ? 6.2.42 at+c device view cu rrent flash device type .................................................. 151 ? 6.2.43 at+c calr ca ll ready qu ery .............................................................................. 151 ? 6.2.44 a t +gsv display product identification in form ation ............................................. 152 ? 6.2.45 a t +sgpio co ntrol the gpio ................................................................................. 152 ? 6.2.46 a t +spwm ge nera te th e p u lse-w i dth-mo dulation ................................................ 153 ? 6.2.47 a t +ec ho echo c a nce l lation control ................................................................... 153 ? 6.2.48 a t +c aas control auto audio switch .................................................................. 154 ? 6.2.49 a t +svr configure v o ice coding t y pe f o r v o ic e ca lls ......................................... 155 ? 6.2.50 a t +gsmbusy r e ject inc o m i ng call .................................................................... 156 ? 6.2.51 a t +ce m nl set the li st of em er genc y nu m b er ................................................... 157 ? 6.2.52 a t *ce lllock s e t the list of arfcn which needs to be locked ................... 158 ? 6.2.53 a t +sl e ds set the t i m e r period of net l i ght ....................................................... 159 ? 7 at c o m m a nds for gprs supp ort ............................................................................................. 160 ? 7.1 overview of a t com m a nds for gprs support .................................................................. 160 ? 7.2 deta ile d descriptions of a t com m a nds for gprs support ............................................... 160 ? 7.2.1 a t + c ga tt attac h or detac h from gprs service .................................................. 160 ? 7.2.2 a t + c gdcont defi ne pdp c o ntext ....................................................................... 161 ? 7.2.3 a t + c gqmin qual ity of servic e profile (mi n i m u m accepta ble) ........................... 163 ? 7.2.4 a t + c gqreq quality of se rvice profile (re q uested) ............................................. 164 ? 7.2.5 a t + c gact pdp c ontext ac tivate or dea c tiva te .................................................... 166 ? 7.2.6 a t + c gda t a enter data s t ate ................................................................................. 166 ? 7.2.7 a t +cgp addr show pdp address ......................................................................... 167 ? 7.2.8 a t + c gclass gprs mo bile s t ation class............................................................. 168 ? 7.2.9 a t + c gerep contr o l uns o lici ted gprs event reporting ...................................... 169 ? 7.2.10 a t +c greg network re gistra tion s t atus .............................................................. 170 ? 7.2. 1 1 a t + c gsms sele ct serv ice for mo sms messa ges .............................................. 171 ? 8 at c o m m a nds for t c pip applica t ion t oolkit ......................................................................... 173 ?
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 9 2011.06.22 8.1 overview ................................................................................................................... .......... 173 ? 8.2 deta ile d descriptions of com m a nds................................................................................... 174 ? 8.2.1 a t + c ipmux s t art up multi-ip c o nnec tion ............................................................ 174 ? 8.2.2 a t + c ipst ar t s t ar t up t c p or u d p connec tion ................................................... 174 ? 8.2.3 a t + c ipsend send data t h ro ugh tcp or udp connec tion................................... 176 ? 8.2.4 a t + c ipqsend select da ta t r ans m itting m ode ..................................................... 178 ? 8.2.5 a t + c ip ack query previous c o nnec tion da ta t r ansm itting s t ate .......................... 179 ? 8.2.6 at+ c ipclose close tc p or ud p conn ec tion ..................................................... 180 ? 8.2.7 a t + c ipshut deac tivat e gprs pdp c ontext ........................................................ 180 ? 8.2.8 a t + c lpor t set l o cal por t ..................................................................................... 181 ? 8.2.9 a t + c stt s t art t a sk and se t apn, user name, passwor d ........................... 181 ? 8.2.10 a t +cii cr bring u p w i re less c o nne ction with gprs or csd ............................. 182 ? 8.2. 1 1 a t + c ifsr get l o cal ip address ............................................................................ 183 ? 8.2.12 a t +ci pst a t us query current conne ction s t atus ............................................... 183 ? 8.2.13 a t +c dnscfg configur e d o m a in nam e server ................................................... 185 ? 8.2.14 a t +c dnsgip query the ip a ddress of give n do m a in na m e ............................... 185 ? 8.2.15 a t +ci p head add a n ip hea d at the be ginning of a pa cka g e r ece ived .............. 186 ? 8.2.16 a t +ci p a t s set au to sending t i m e r ..................................................................... 187 ? 8.2.17 a t +ci pspr t set pro m pt of ?>? when module sends data ................................... 188 ? 8.2.18 a t +ci pser v er conf igure module as ser v er ...................................................... 188 ? 8.2.19 a t +ci p csgp set csd or gprs for conn ection mode ........................................ 189 ? 8.2.20 a t +ci psrip show re m o te ip a ddress a nd p o rt when rec e ived da ta ................ 190 ? 8.2.21 a t +ci p dpdp set whether to c h ec k s t a t e of gprs network t i m i ng .................. 191 ? 8.2.22 a t +ci p mode select tcpip applicat ion mode .................................................... 192 ? 8.2.23a t +cip ccfg c onf igure t r a n spar ent t r ansfer mode ............................................ 192 ? 8.2.24 a t +ci pshowtp display t r a n s f er prot oc ol in ip head whe n re ceive d d a ta ..... 193 ? 8.2.25 a t+ci p udpmode udp exte nded mode ............................................................. 194 ? 8.2.26 a t +ci p rxget get data from network manually ............................................... 195 ? 8.2.27 a t +ci p qrclose quic k r e m o te c l ose ............................................................... 196 ? 8.2.28 a t +ci pscont save t c pip applica t ion conte x t ................................................. 196 ? 8.2.29 a t +ci p txiss discard input a t data in t c p data send ...................................... 197 ? 9. at c o m m a nd for dt mf de tection appli cation ...................................................................... 199 ? 9.1 overview ................................................................................................................... .......... 199 ? 9.2 deta ile d descriptions of com m a nds................................................................................... 199 ? 9.2.1 a t +dd e t se t dt mf detec t ion ............................................................................... 199 ? 10. at com m and for jd applicat ion ........................................................................................... 200 ? 10. 1 overvie w .................................................................................................................. ......... 200 ? 10. 2 detailed descript ions of com m a nds ................................................................................. 200 ? 10. 2. 1 a t +sjdr set jam m i ng dete ction .......................................................................... 200 ? 11 supporte d unsolicite d r e sult c odes ........................................................................................ 20 2 ? 1 1 .1 summ ary of cme e r ror codes .................................................................................... 202 ? 1 1 .2 summ ary of cm s er ror codes .................................................................................... 203 ? 12 at com m ands sam p le .......................................................................................................... .. 206 ? 12. 1 profile c o m m ands .......................................................................................................... ... 206 ?
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 10 2011.06.22 12. 2 sim c o mm ands .............................................................................................................. .. 207 ? 12. 3 general com m a nds .......................................................................................................... .2 0 8 ? 12. 4 c a ll control com m a nds .................................................................................................... 2 09 ? 12. 5 sim t o olkit com m a nds .................................................................................................... 21 1 ? 12. 6 audio c o m m ands ............................................................................................................ .. 21 1 ? 12. 7 sms c o mm ands .............................................................................................................. .2 1 1 ? 12. 8 gprs c o m m ands ............................................................................................................. 213 ?
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 11 2011.06.22 1 introduction 1.1 scope of the document this doc um ent prese n ts th e a t com m a nd set for simc o m sim90 0 r series c e ll ul ar en gine . 1.2 related documents y ou ca n v i sit t h e simc om w e bsit e us in g the fol l ow i n g link: h t tp :/ / www .sim.c o m
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 12 2011.06.22 1.3 conventions and abbr eviations in t h i s do cu men t , th e gsm en gi nes are referred to as following term: 1) me (mo b i l e e qui pm ent); 2) ms (mob il e s t ati on) ; 3) t a (t er m i nal adapter); 4) dce (data c o m m unicatio n equipm ent) or facsim ile dce (f ax m o d e m , f ax board); in ap pl ica t i on, co ntro lli n g d evi ce co ntro ls th e g s m e n g i ne by se nd in g a t com m a nd vi a i t s seri a l int e rface. the control l i ng de vic e a t t h e ot her end of the s e rial li ne is ref e rred t o as f o ll owing term : 1) te (t erm i nal equi pm ent); 2) d te (d ata t e rm inal e q u i pm ent) or p l ai nly " t he a ppl ica t i on" w h ic h is ru nn i ng on a n em bedde d sy stem ; 1.4 a t command syntax the " a t" or " at" prefix m u st be se t a t the be gi nn in g of ea ch co mm and li ne. to t erm inate a com m a nd lin e en ter < cr> . com m a nds are usu a l l y foll o w ed by a resp onse that includes. "< lf> " throu g h o u t t h is d o c u m e n t , o n ly th e respons es are prese n te d, are om itted int e nt io na lly . the a t c o m m a nd set im plem ented by s i m90 0 r is a c o m b inat io n of g s m07. 05 , g s m07.0 7 an d itu - t reco m m e ndati on v . 2 5 ter an d t h e a t com m a nds dev e l ope d by simco m . note: a hex string such as "00 4 9 4 9 49 4 9 ff f f ff ff" will be sent out thr o ugh seri al port at the baud rate of 1 1 5 2 0 0 imm e d i atel y afte r s i m900r is p o w e r e d on. t h e string sha l l be ignor e d since it is used for synchr oniz ation w i th pc tool. only enter a t c o mman d thr o ugh serial port after SIM900R is power e d on and unsolicit ed result code "rdy" is r ece ived fr om seri al port . if auto-bauding is ena b led, the unso licited result co des "rdy " and so on ar e not indicated when you s t art up the me, and the "a t" pr efix, not "at" pr efix must be set at the beginni ng o f ea c h com m a nd l i n e. all t h ese a t com m a nds ca n b e sp lit i n to thre e ca te gor ies sy nta c t i ca l l y : " basic ", " s parameter ", and " extended ". these are as foll ows: 1.4 . 1 basi c sy ntax these a t c o mm ands have t h e form at of " at ", o r " a t & ", wh ere " "is the com m a nd, an d " "is/are the ar gu m e nt(s) for tha t comm and. an e x am ple of this is " at e ", which te lls the dce whether rece ive d characters s h ou ld be echo ed back t o th e dte acco r di ng t o the va lu e of " ". " " is op tiona l a n d a d e fau lt wi ll be used if m i ssing .
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 13 2011.06.22 1.4 . 2 s p a r a meter s y ntax these a t comm ands have the f o rm at of " at s = ", wh ere " " is the ind e x of t h e s register to set, and " "i s t h e v a l u e to a ssi gn to it . " " is o p t i o n al ; if it is m i ssin g , t h e n a defau lt va lue i s assig n e d . 1.4.3 extended syntax these com m a nds ca n operat e in several m odes, as in th e foll owin g t a b l e: t a ble 1: t y pes of a t commands and r e sponses test command at + =? the mobile equipment returns the list of parameters and value ranges set with the corresponding write command or by internal processes. read command at + ? this command returns the currently set value of the parameter or parameters. write command at+= this command sets the user-definable parameter values. execution command at+ the execution command reads non-variable parameters affected by internal processes in the gsm engine. 1.4 . 4 c o mbining a t c o mm ands on the same c o mma nd line y ou c an e n ter sev eral a t c o m m ands on the sam e lin e. in t h is case , y ou do n o t ne ed to ty pe t h e " at " o r " at " prefi x befor e e v ery c o m m a nd. ins t ea d, y o u on ly nee d ty pe " at " o r " at " th e beginni n g of t h e com m a nd l i ne. pl ease note to us e a s e m i colon as t h e c o m m a nd delim iter after an ext e n d ed c o m m a nd; in b a si c sy nt ax or s par a m e ter sy nta x , t h e s e m i co lo n nee d n o t en ter , for exam ple: a t e 1 q 0 s0= 1 s3= 13v 1x 4 + ifc=0, 0;+ipr= 1 1 5 2 00; &w . the com m and l i ne buf f er can acc ept a m axi m u m of 556 c h arac ter s . if the char acters ent e re d exce ed ed th is num ber then n one of t h e co mm and will e x ec ute d a n d t a will retur n " error ". 1.4.5 enterin g success i ve a t com m ands on separ a te lines when y ou ne ed to en ter a s e ries of a t co mm ands on se parat e l i n e s, p l ease n o te t h a t y o u ne ed to w a it t h e f i na l respons e (for exam ple o k , cme error , c m s error) of l a st a t com m and y ou en ter e d before y o u e n t e r th e ne xt a t com m a nd. 1.5 supported character sets the sim9 00 r a t com m a nd in terfac e d e faults to th e ira charact er set. t h e sim 9 00r supports the f o ll owin g chara c ter se ts:
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 14 2011.06.22 ? gsm fo r m at ? ucs2 ? hex ? ira ? pccp ? pcdn ? 88 59-1 the charact er set ca n be s e t and i n t e rrogat e d usi n g t h e " a t+cscs " co mm an d (gsm 0 7 .07). the chara c ter set is defi ne d i n gsm spe c ifi cati o n 07.05. the charact er set af fec t s tra n sm ission and rece pt io n of sms an d sm s cel l br oa dc ast m e ssages, the en try and disp lay of ph o n e bo ok en trie s tex t fie l d an d sim a ppl ic ati o n t o ol kit a l ph a stri ngs . 1.6 flow contr ol flow c o n t rol i s very im portant for correc t com m unicati o n betw e e n t h e g s m e n g i n e and d te. for in th e c a se s u ch as a da ta or fa x cal l, the sen d i n g d e vi ce is trans f erring da ta f a ster tha n th e recei ving side is rea d y t o a ccept. whe n t h e rece ivi n g buf fer re ac hes its c a pa ci ty , the rec e iving dev i ce sh oul d be c a p a bl e t o cause t h e se nd ing de vi ce to paus e u n t il it catc h es up . there are ba sical ly two a pproaches to ach iev e da ta flow c o n t ro l: software flow control and hardw a re fl ow co ntro l. sim 9 0 0 r su pp ort bot h tw o k i n d s of flow c o n t rol. in mu lt ipl e x m ode, it is re c o m m ended t o use t h e har d w a re flow c o n t r o l. 1.6 . 1 softw a r e flow c o ntr o l ( x on / x of f flow c o ntr o l) so ftware flo w co ntro l send s d i f f eren t ch ar acter s to sto p (xof f , d ecimal 1 9 ) and r e su m e ( xon, dec i m a l 1 7 ) d a ta f l ow . it is qui te usefu l in som e appli c a t ions t h at o n ly use t h ree w i re s on t h e ser i al int e rface. the default fl ow co ntro l a p proac h of sim90 0 r is h a r d w a re flow co ntrol (r ts/cts flow co ntro l ) , to e n able soft ware flow control in t h e d te in t e rface a nd wit h i n gsm engine, type the foll owing a t c o mma n d : at+ifc=1, 1 this s e tt in g i s store d vol at ile, for use after restar t, a t+ifc=1, 1 shou ld b e st o r ed t o the us e r profil e w i t h at & w . note: th e a t co mma n d s li st ed i n th e t a b l e of at & w ch a p ter sh oul d b e st ored to us er pr ofile w i t h at & w for u s e aft e r res t ar t. mos t ot her a t c o m m a nds i n v . 2 5 , 0 7 . 05, 07. 07 , g p rs w ill st ore param e ters au tom a tically a n d ca n be used after m odule r e start. ensure t h a t a n y com m unicati ons sof t w a re pac k a ge (e.g. hyper ter m inal) uses software flow control . note: software flo w contr o l s h o u ld n o t b e us e d for d a ta cal l s where b i nar y data wi ll be transm itted o r
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 15 2011.06.22 recei ved (e.g. tcp/ip) as the dte i n terfa ce m a y inte rpret binary dat a as flow c o ntrol charac ters. 1.6 . 2 h a rdw a r e fl ow contr o l (r ts/c ts flow contr o l) hardware flow cont ro l ac h i e v e s t h e d a ta fl o w co n t ro l by c o nt ro ll in g th e r t s/c t s li n e . whe n t h e dat a tra n sfer s h o u ld b e s u sp end e d, t h e ct s lin e is se t in acti v e u n t il th e tra n sfer fro m the re cei vi n g buf fer has c o m p leted. w h e n the re cei vi ng buf fer is ok to rece ive m o re dat a , cts goes ac tive onc e aga i n. t o ach ie ve ha rdw a re flow c ontr o l, e n sure th at th e r t s/ cts li nes are prese n t o n y o u r a ppl ica t i o n pla tform .
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 16 2011.06.22 2 at co mmands according to v.25ter these a t c o mm ands are desi gne d ac c o rdi ng t o th e itu - t (internat i o n al t e le c o m m unicati on u n io n, t e l eco mm unicat io n sector) v . 2 5 te r doc um ent. 2.1 overview of a t 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 at d > < n > originate call to phone number in current memory at d > < s t r > originate call to phone number in memory which corresponds to field at d l redial last telephone number used ate set command echo mode at h disconnect existing connection at i display product identification information atl set monitor speaker loudness at m set monitor speaker mode +++ switch from data mode or ppp online mode to command mode ato switch from command mode to data mode at p select pulse dialling at q set result code presentation mode at s 0 set number of rings before automatically answering the call at s 3 set command line termination character at s 4 set response formatting character at s 5 set command line editing character at s 6 pause before blind dialling at s 7 set number of seconds to wait for connection completion at s 8 set number of seconds to wait for comma dial modifier encounter ed in dial string of d command ats10 set disconnect delay after indicating the absence of data carrier att select tone dialing at v ta response format at x set connect result code format and monitor call
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 17 2011.06.22 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 a t commands according to v .25ter 2 . 2.1 a/ re- i ssues the la st co mma nd giv e n a/ re-issues the la st comma nd given execution command a/ response re-issues the previous command reference v.25ter note 2.2 . 2 a t a a n sw er an incoming c a ll a t a answer an incomin g cal l 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 ta switches to data mode.
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 18 2011.06.22 note: output only if atx parameter setting with the >0 when ta returns to command mode after call release ok response in case of voice call, if successfully connected ok response if no connection no carrier reference v.25ter note see also atx 2.2 . 3 a t d mobile o r ig i n ated call t o dial a number a t d mo bile orig ina t ed ca ll to dial a number execution command atd[ if no dial tone and (parameter setting atx2 or atx4 ) no dialtone if busy and (parameter setting atx3 or atx4 ) busy if a connection cannot be established no carrier if the remote station does not answer no answer if connection successful and non-voice call. connect ta switches to data mode. note: output only if atx parameter setting with the >0
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 19 2011.06.22 when ta returns to command mode after call release ok if connection successful and voice call ok parameters stri n g of dia l i ng di gits an d opt io nal l y v . 25 ter m odifiers di al ing digits: 0-9, * , #, + , a , b, c fo ll owin g v.2 5 ter m odifiers are ign o red : ,(comma), t , p, !, w , @ emergency call: < n > stand a rdi zed em ergency n u m ber 112 ( no sim nee d e d ) string of gsm m odifiers: i activ es clir (d isables pre s enta ti on of o w n num ber to called party) i d e a c t i v a t e s clir (enab l e prese n tati on of ow n num ber to called party) g activ ates cl o s ed user grou p i n v o ca ti on f o r th is c a ll only g d e a c ti vat e s cl ose d u s er g r oup i n voc ati o n for t h is c a ll only <;> o n l y require d t o s e t u p vo ice ca l l , re turn to c o m m and state reference v.25ter note z para m e ter "i" and "i" on ly if no * # co de is with in th e d i al s t rin g z is default for last number that can be dialed by atdl z *# codes sent with atd are treated as voice calls. therefore, the command must be terminated with a semicolon ";" z see atx command for setting result code and call monitoring parameters. responses returned after dialing with atd z for voice call two different responses mode can be determined. ta returns " ok " immediately either after dialing was completed or after the call is established. the setting is controlled by at+colp . factory default is at+colp=0 , this cause the ta returns " ok " immediately after dialing was completed, otherwise ta will returns " ok ", " busy ", " no dial tone ", " no carrier ". using atd during an active voice call: z when a user originates a second voice call while there is already an active voice call, the first call will be automatically put on hold.
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 20 2011.06.22 z the current states of all calls can be easily checked at any time by using the at+clcc command. 2.2 . 4 a t d > < n > orig inat e c a ll to phone number i n curr ent memor y atd> originate call to ph one number in current memory response this command can be used to dial a phone number from current phonebook memory. note: this command may be abor ted generally by receiving an ath command or a character during execution. the aborting is not possible during some states of connection establishment such as handshaking. if error is related to me functionality +cme error: if no dial tone and (parameter setting atx2 or atx4 ) no dialtone if busy and (parameter setting atx3 or atx4 ) busy if a connection cannot be established no carrier if the remote station does not answer no answer if connection successful and non-voice call. connect ta switches to data mode. note: output only if atx parameter setting with the >0 when ta returns to command mode after call release ok if successfully connected and voice call ok execution command atd>[ ][ ][;] parameters integer type memory location should be in the range of locations available in the memory used string of gsm modifiers:
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 21 2011.06.22 i override the clir suppl e m entary servi ce subscri p ti on default value for this call invocation (restrict cli presentation) i override the clir supp lem e ntary service su bscr ipt i o n default value for this call suppressi on (all ow cli pre s enta ti on) g co nt ro l th e c ug sup p le m e n t ary service inform ation for this call c u g n o t s u p p o r t e d g co nt ro l th e c ug sup ple m e ntary service inform ation for this call cug no t su pp o r ted <;> on ly requ i r ed t o se t u p v o ic e ca ll , ret u rn to com m an d sta t e reference v.25ter no te z para m e ter "i" and "i" on ly if no * # co de is with in th e d i al s t rin g z *# codes sent with atd are treated as voice calls. therefore, the command must be terminated with a semicolon ";" z see atx command for setting result code and call monitoring parameters. 2.2 . 5 a t d > ori g ina t e c a ll to phone n u mber i n memor y w h ich corr esponds to fi el d a t d> originate c a ll to phone numb er in memor y whi c h corresponds to fi eld execution command atd>[][][;] resp onse this command make the ta attempts to set up an outgoing call to stored number. all available memories are searched for the entry . note: this command may be abor ted generally by receiving an ath command or a character during execution. the aborting is not possible during some states of connection establishment such as handshaking. if error is related to me functionality +cme error: if no dia l t o ne and (param eter sett ing at x 2 or at x 4 ) no dialtone if busy and (para m eter sett i ng at x 3 or at x 4 ) busy if a co nne ct io n ca nn ot be es tab lish ed
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 22 2011.06.22 no carrier if the remote station does not answer no answer if connection successful and non-voice call. connect ta switches to data mode. note: output only if atx parameter setting with the >0 when ta returns to command mode after call release ok if successfully connected and voice call ok parameters string type (string should be included in quotation marks) value ( " x " ), which should equal to an alphanumeric field in at least one phone book entry in the searched memories. str formatted as current te character set specified by +cscs . string of gsm modifiers: i activ es clir (d isables pre s enta ti on of o w n num ber to called party) i d e a c t i v a t e s clir (enab l e prese n tati on of ow n num ber to called party) g activ ates cl o s ed user grou p i n v o ca ti on f o r th is c a ll only g d e a c ti vat e s cl ose d u s er g r oup i n voc ati o n for t h is c a ll only <;> o n l y require d t o s e t u p vo ice ca l l , ret u rn to co mm and stat e reference v.25ter note z parameter "i" and "i" only if no "*#" code is within the dial string z *# codes sent with atd are treated as voice calls. therefore, the command must be terminated with a semicolon ";" z see atx command for setting result code and call monitoring parameters. 2 . 2.6 a t dl redia l la st t e lepho ne number used a t dl redia l la st t e lep h o n e number used execution command atdl response this command redials the last voice and data call number used. note: this command may be abor ted generally by receiving an ath command or a character during execution. the aborting is not possible
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 23 2011.06.22 during some states of connection establishment such as handshaking. if error is related to me functionality +cme error: if no dial tone and (parameter setting atx2 or atx4 ) no dialtone if busy and (parameter setting atx3 or atx4 ) busy if a connection cannot be established no carrier if the remote station does not answer no answer if connection successful and non-voice call. connect ta switches to data mode. note: output only if atx parameter setting with the >0 when ta returns to command mode after call release ok if successfully connected and voice call ok reference v.25ter note z see atx command for setting result code and call monitoring parameters. z return the numbers and symbols which atd supports if there is no last dialing context. 2.2.7 a te s e t command echo mode a te set command echo mode response this setting determines whether or not the ta echoes characters received from te during command state. ok execution command ate parameter 0 echo mode off 1 echo mode on
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 24 2011.06.22 reference v.25ter note 2.2.8 a t h disconnect existing conn ection 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 0 d i scon nec t a ll ca lls on th e ch an nel t h e com m a nd is requested. all active or waiting calls, cs data calls, gprs call of the channel will be disconnected. 1 disconnec t al l c a lls on all connect ed cha nne ls. al l acti v e or waiting calls, csd calls, gprs call will be disconnected. (clean up of all calls of the me) 2 di scon nect all co nn ect e d cs d a t a call on l y on th e chan n e l the command is requested. (speech calls (active or waiting) or gprs calls are not disconnected) 3 di scon nect all co nn ect e d gprs cal l s on l y on th e chan n e l the command is requested (speech calls (active or waiting) or cs data calls are not disconnected. 4 d i sco n n e c t al l cs cal ls (eit her sp eec h or da ta) but d o es n o t disconnect waiting call (either speech or data) on the channel the command is requested. 5 d i sco n n e c t w a it in g c a ll (eit her sp eec h or da ta) but d o es n o t disconnect other active calls (e ither cs speech, cs data or gprs) on the channel the command is requested. (rejection of incoming call) reference v.25ter note 2.2 . 9 a t i d i splay pr oduct identification information ati display product iden tification information execution command ati response ta issues product information text example:
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 25 2011.06.22 sim900 r11.0 ok reference v.25ter note 2.2.10 a t l set mo nitor speaker loudness a t l set monitor speaker loudness response ok execution command atl parameter 0..9 volume reference v.25ter note no effect in gsm 2.2.1 1 a t m set monitor speaker mode atm set monitor speaker mode response ok execution command atm parameter 0..9 mode reference v.25ter note no effect in gsm 2 . 2.12 +++ swi t ch fr o m da ta mo de or ppp online mode to command mode +++ switch from data mode or ppp online mode to command mode execution command +++ response the +++ character sequence causes the ta to cancel the data flow over the at interface and switch to command m ode. this allows you to enter at command while maintaining the data connection to the remote server. ok to prevent the +++ escape sequence from being misinterpreted as data, it should comply to following sequence: 1. no characters entered for t1 time (1 second) 2. "+++" characters entered with no characters in between (0.5 second) 3. no characters entered for t1 timer (0.5 second) 4. switch to command mode, otherwise go to step 1. reference note
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 26 2011.06.22 v.25ter to return from command mode back to data mode: enter ato . 2 . 2.13 a t o swi t ch fr o m command mode to da t a mo de 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 note: only if parameter setting atx>0 execution command ato[n] parameter 0 sw itch from comm and m ode to dat a m ode. reference v.25ter note 2 . 2.14 a t p sel ect pul s e di a l li ng atp select pulse dialling execution command atp response ok reference v.25ter note no effect in gsm 2 . 2.15 a t q set resul t code pr esentati on mode a t q set result code pr esentation mode response this parameter setting determines whether or not the ta transmits any result code to the te. information text transmitted in response is not affected by this setting. if =0: ok if =1: (none) execution command atq parameter 0 t a transm its result co de 1 res u lt co d e s are s u p p ressed a n d n o t transm itted
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 27 2011.06.22 reference v.25ter note 2.2.16 a t s0 set number of rings be f o r e automat i cal l y answeri ng the call a t s0 set number of rin g s befor e automati cally a n swering the call response ok read command ats0? parameter see write command response this parameter setting determines the number of rings before auto-answer. ok error write command ats0= parameter 0 automatic answering is disable. 1-25 5 num b er of rin g s t h e m ode m will wait f o r bef o re answerin g the phone if a ring is detected. reference v.25ter note if is set too high, the calling party may hang up before the call can be answered automatically. 2.2.17 a t s3 set command li ne t e rm ination c h ar acter ats3 set command line termination character response ok read command ats3? parameter see write command response this parameter setting determines th e character recognized by ta to terminate an incoming command line. the ta also returns this character in output. ok error write command ats3= parameter 13 command line termination character
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 28 2011.06.22 reference v.25ter note default 13 = cr. it only supports default value. 2.2 . 1 8 a t s4 set r e sponse fo rmatting c h aracter a t s4 set r e sponse fo r m atting c h ar acter response ok read command ats4? parameter see write command response this parameter setting determines the character generated by the ta for result code and information text. ok error write command ats4= parameter 1 0 resp onse form atting ch ara c ter reference v.25ter note default 10 = lf. it only supports default value. 2.2.19 a t s5 set command line editi n g c h aracte r a t s5 set command line editing ch aracter response ok read command ats5? parameter see write command response this parameter setting determines the character recognized by ta as a request to delete from the command line the immediately preceding character. ok error write command ats5= parameter 0 - 8 -127 response formatting character
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 29 2011.06.22 reference v.25ter note default 8 = backspace. 2 . 2.20 a t s6 pa use be fore blind dialling ats6 pause before blind dialling read command ats6? response error response ok error write command ats6= parameter 0 . . 9 9 9 t i m e reference v.25ter note no effect in gsm 2.2.21 a t s7 set number of seconds to w a it f o r c o nnection co mpletion a t s7 set number of seconds to w a it for connection completion response ok read command ats7? parameter see write command response this parameter setting determines the amount of time to wait for the connection completion in case of answering or or iginating a call. ok error write command ats7= parameter 1-60 -255 num b er of sec o n d s t o wait for c o n n ec tio n com p leti on reference v.25ter note z if called party has specified a high value for ats0=, call setup may fail. z the correlation between ats7 and ats0 is important z example: call may fail if ats7=30 and ats0=20. z ats7 is only applicable to data call.
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 30 2011.06.22 2.2.22 a t s8 set number of seconds to w a it f o r comma di al modifier enc o unter ed in dial s t ring of d c o mmand a t s8 set number of seconds to w a it for c o m m a dial modifier enc o unter ed in dial string of d command response ok read command ats8? parameter see write command response ok error write command ats8= parameter 0-25 5 the v a lu e of th is reg i ster det e rm ines h o w lo ng th e m odem should pause when it sees a comma in the dialing string. reference v.25ter note no effect in gsm 2.2 . 2 3 a t s10 set d i scon nect d e la y af te r indicatin g the absence of data carri er a t s10 set disconnect delay after indi catin g the absence of dat a car r ie r response ok read command ats10? parameter see write command response this parameter setting determines the amount of time that the ta will remain connected in absence of data ca rrier. if the data carrier is once more detected before disconnecting, the ta remains connected. ok error write command ats10= parameter 1-15 -254 n u m b er of te nt hs sec o n d s of del a y reference v.25ter note
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 31 2011.06.22 2.2 . 2 4 a t t select t o ne d i al ing att select tone dialing execution command att response ok reference v.25ter note no effect in gsm 2 . 2.25 atv ta respo n se forma t atv ta response format response this parameter setting determines the contents of the header and trailer transmitted with result codes and information responses. when =0 0 when =1 ok execution command atv parameter 0 information response: short res u lt co de form at: < cr> 1 information response: long result code format: the result codes, their numeric equivalents and brief descriptions of the use of each are listed in the following table. reference v.25ter note atv1 atv0 description ok 0 acknowledges execution of a command connect 1 a connection has been established; the dce is moving from command state to online data state ring 2 the dce has detected an incoming call signal from network no carrier 3 the connection has been terminated or the attempt to establish a connection failed error 4 command not recognized, command line maximum length exceeded, parameter value invalid, or other problem with processing the command line no dialtone 6 no dial tone detected busy 7 engaged (busy) signal detected
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 32 2011.06.22 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 manufacturer- specific same as connect, but includes manufacturer-specific text that may specify dte speed, line speed, error control, da ta compression, or other status 2 . 2.26 a t x set conne ct result co de fo rma t a n d mo nito r call pr og r e ss a t x set connect result co de fo rma t a nd mo n i to r call pr og r e ss response this parameter setting determines whether or not the ta detected the presence of dial tone and busy signal and whether or not ta transmits particular result codes. ok error execution command atx parameter 0 connect result code only returned, dial tone and busy detection are both disabled. 1 connect result code only returned, dial tone and busy detection are both disabled. 2 connect result code returned, dial tone detection is enabled, busy detection is disabled. 3 connect result code returned, dial tone detection is disabled, busy detection is enabled. 4 connect result code returned, dial tone and busy detection are both enabled. reference v.25ter note 2 . 2.27 a t z reset de fault configuration atz reset defaul t configuration response ta sets all current parameters to the user defined profile. ok error execution command atz[] parameter 0 restore profile 0
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 33 2011.06.22 1 restore profile 1 reference v.25ter note parameter i m pacted by z command: command parameter name default value ate 0x01 atq 0x00 atv 0x01 atx 0x04 at&c 0x01 at&d 0x01 at+ifc 0x00 at+ifc 0x00 at+fclass 0x00 ats0 0x00 ats3 0x00 ats4 0x0d ats5 0x0a ats7 0x08 ats8 0x32 ats10 0x0e 2 . 2.28 a t &c set dcd functio n mo de a t &c set dcd functio n mo de response this parameter determines how the state of circuit 109 (dcd) relates to the detection of received line signal from the distant end. ok error execution command at&c[] parameter 0 dcd line is always on 1 dcd line is on only in the prese n ce of dat a carri er reference v.25ter note 2.2.29 a t &d set dtr function mode a t &d set dtr function mode
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 34 2011.06.22 response this parameter determines how the ta responds when circuit 108/2 (dtr) is changed from the on to the off condition during data mode. ok error execution command at&d[] parameter 0 ta ignores status on dtr. 1 o n - >o ff on d t r: c h a nge to c o m m and m ode w i t h remaining the connected call. 2 o n - >o ff on d t r: d i s c on nec t c a l l , c h an ge to com m a nd mode. during state dtr = off is auto-answer off. reference v.25ter note 2 . 2.30 a t &f fa ctory defined configuration at&f factory defi ned configuration response ta sets all current parameters to the manufacturer defined profile. ok execution command at&f[] parameter 0 set al l t a p a ra m e ters to m a nufactur er defau lts. reference v.25ter note parameter i m pacted by &f comman d : command parameter name default value ate 0x01 atq 0x00 atv 0x01 atx 0x04 at+ifc 0x00 at+ifc 0x00 ats0 0x00 ats3 0x0d ats4 0x0a ats5 0x08 ats7 0x64 ats8 0x02 ats10 0x0e
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 35 2011.06.22 at+crlp 0x00 at+crlp 0x07 at+crlp 0x61 at+crlp 0x61 at+crlp 0x48 at+crlp 0x06 at+cpbs 0x53 0x4d 0x00 at+csmp 0x11 at+csmp 0x00 at+csmp 0x18 at+csmp 0x00 at+csmp 0x 00 at+csmp 0x11 at+csmp 0x00 at+csmp 0x18 at+csmp 0x00 at+csmp 0x00 at+csmp 0x11 at+csmp 0x00 at+csmp 0x18 at+csmp 0x00 at+csmp 0x00 at+csmp 0x00..0x00 at+csmp 0x00 at+csmp 0x00 at+cr 0x 00 at+csta 0x 81 at+cbst 0x05 0x02 0x00 at+cbst 0x01 0x00 at+cbst 0x01 at+crc 0x00 at+cmod 0x 00 at+cmee 0x00 at+creg 0x00 at+cgreg 0x00 at+csms 0x00 at+cmgf 0x00 at+csdh 0x00
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 36 2011.06.22 at+cscs 0x00 at+clir 0x00 at+clip 0x00 at+colp 0x00 2 . 2.31 a t &v di spl a y curr ent co nfi g ura t i o n at&v display current configuration response ta returns the current parameter setting. ok error execution command at&v[] parameter 0 resp onses in num eric form at reference v.25ter note 2 . 2.32 a t &w sto re active pro f i l e at&w store active profile response ta stores the current parameter setting in the user defined profile. ok error execution command at&w[] parameter 0 store the current configuration in profile 0 1 store th e c u rrent co nfig u r atio n i n profil e 1 reference v.25ter note the user defined profile is stored in non volatile memory. parameter stored by &w command parameter name displayedby &v ate y atq y atv y atx y at&c y at&d y at+ifc y
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 37 2011.06.22 at+ifc y at+fclass y ats0 y ats3 y ats4 y ats5 y ats7 y ats8 y ats10 y 2.2 . 3 3 a t+gcap reque st complete t a capabiliti e s list a t+gcap request complete t a capabiliti e s l i st response ta reports a list of additional capabilities. +gcap: list of supported s ok execution command at+gcap parameter +cg s m g s m fun cti on is supp orte d +fc l a ss f a x funct i o n is su pp orted reference v.25ter no te the com m a nd can be e x ec ut ed only when the sim card i s present. 2 . 2.34 a t+gmi request ma nufactur e r identification at+gmi request manufacturer identification resp onse ok t e s t co mma n d at+gmi=? parameter exec ut io n command at+gmi ta reports one or more lines of information text which permit the user to identify the manufacturer. simcom_ltd ok reference v.25ter no te 2 . 2.35 a t+gmm request t a model identification at+gmm request ta model identification
s m a r t m a c h i n e s m a r t d e c i s i o n SIM900R_a t command manual_v1.01 38 2011.06.22 test command at+gmm=? response ok ta reports one or more lines of information text which permit the user to identify the specific model of device. ok execution command at+gmm parameter produc t m odel i d e n tif ica tio n te xt reference v.25ter note 2.2 . 3 6 a t+gmr r e quest t a r e visi on identificatio n of softw ar e r e leas e at+gmr request ta revision identification of software release test command at+gmr=? response ok ta reports one or more lines of information text which permit the user to identify the revision of software release. revision: ok execution command at+gmr parameter revision of software release reference v.25ter note 2.2.37 a t+goi request glob al object identificati on a t+goi request global object identification test command at+goi=? response ok response ta reports one or more lines of information text which permit the user to identify the device, based on the iso system for registering unique object identifiers.

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