GSM & GPRS Modem - RF Solutions

11GSM & GPRS Modem3.2. Basic Operation :Followings are examples of some AT commands. Please refer to the AT Command guide for a fulldescription.Note: Issue AT+CMEE=1 to have extended error code (+CME ERROR)Description AT commands Modem response CommentsNetwork RegistrationCheckingAT+CREG? CREG=,1 Modem registered to the networkCREG=,2Registration lost, re-registration attemptCREG=,0Modem not registration on the network, noregistration attemptReceiving signalstrengthReceiving anincoming callAT+CSQ +CSQ: 20,0 The first parameter has to be at least 15 for normalcommunicationRINGAn incoming call is waitingATAAnswer the callOKMake a call ATD1234567; Don’t forget the « ; » at the end for « voice » callOKCommunication establishedCME ERROR : 11PIN code not entered (with + CMEE = 1 mode)CME ERROR : 3AOC credit exceeded or a communication is alreadyestablishedCME ERROR : 10Cannot read the SIM cardMake an emergencycallATD 112;OKDon’t forget the « ; » at the end for « voice » callCommunication lossNO CARRIERHang upATHOKEnter PIN codeAT+CPIN=1234OKPIN Code accepted+CME ERROR : 16Incorrect PIN Code (with +CMEE = 1 mode)+CME ERROR : 3PIN already entered (with +CMEE = 1 mode)Automatically answercallsATS0? 002OKATS0=2 OK Sets the modem to answer after 2 ringsATS0=0 OK Resets the modem to no automatic answerSaves parameters innon-volatile memoryAT&WOKThe configuration settings are storedDS100-1 May ’07 www.rfsolutions.co.uk 2007 REG No 277 4001, ENGLAND. Page 11