Neo_M660 AT Command SetCopyright © Neoway Technology Co., Ltd 102A.6 Flowchart of Sending SMS MessagesFigure A-5 Flowchart of sending SMS messagesSend AT+CSQ\rSend AT+CREG?\rStart the module5. Check the RSSI.+CSQ: 99, 99 indicates no signal.+CSQ: 21, 99 indicates that the RSSI is 21.6. Check the network status.The module returns +CREG: 0,1 or+CREG: 0,5, indicating that it has registereda network.Startup codeSend AT\rNo OKSend AT+CCID\rReturn ICCIDReturn ERRORNo signal3. Check whether AT commands areavailable.4. Read the ICCID of the SIM card.ERROR indicates that the SIM card cannotbe found.Check whether the SIM card is inserted orthe card socket works properly.1. Power on the module.2. +EIND: 1 indicates that the module isready.Return OKThere is signalNot register thenetwrokRegister the netwrokSend AT+CMGF=1\rSend AT+CSCS="GSM"\rReturn OKReturn ERRORReturn ERRORReturn OKSend a text message7. Set the SMS mode.Note:AT+CMGF=1 indicates the text mode.AT+CMGF=0 indicates the PDU mode.8. Set the TE character set.Note:Select a format for the sent content. Fordetails, see the command set.In general, set it to GSM for text format andUCS2 for PDU format.Send AT+CMGS="number"\r9. Send the SMS message.Note:If you want to sent PDU SMS messages,send AT+CMGS=Length.Length indicates the length of the SMSmessage. For details, see the A.1.Check whether > is returnedNot return >Return >10. Send data only after the module returns>.Send Neoway TechnologyFail to sendSuccessfulEnd11. Send data (end with 0x1A)+CMGS: 117 (not a fixed value)OKIndicates that the data is sent successfully.Note:On the hyper terminal or UART tool, pressCtrl+Z to enter the end symbol 0x1A.
