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GSM MODEM

NSK SUPPORT

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Basic AT Commands for SIMCOMGSM/GPRS Module

TO CHECK THE MODEM:

AT

OK

TO CHANGE SMS SENDING MODE:

AT+CMGF=1

OK

TO SEND NEW SMS:

AT+CMGS=”MOBILE NO.”

<MESSAGE

{CTRL+Z}

PREFERRED SMS MESSAGE STORAGE:

AT+CPMS=?

+CPMS: (“SM”),(“SM”),(“SM”)

OK

AT+CPMS?

+CPMS: “SM”,19,30,”SM”,19,30,”SM”,19,30

TO MAKE A VOICE CALL:

ATD9876543210;

TO REDIAL LAST NO:

ATDL

TO RECEIVE INCOMING CALL:

ATA

TO HANGUP OR DISCONNECT A CALL:

ATH

TO SET A PARTICULAR BAUDRATE:

AT+IPR=? {To view the baud rate values}

AT+IPR=0 {To set the modem to autobauding mode}

OPERATOR SELECTION:

AT+COPS=?

OK

AT+COPS?

+COPS: 0,0,”AirTel”

OK

AT+CRC SET CELLULAR RESULT CODES FOR INCOMING CALL INDICATION:

AT+CRC=?

+CRC: (0-1)

OK

AT+CRC?

+CRC: 0

OK

AT+CRC=1

OK

+CRING: VOICE

READ OPERATOR NAMES.

AT+COPN=?

OK

AT+COPN

+COPN: “472001?,”DHIMOBILE”

+COPN: “60500

+COPN: “502012?,”maxis mobile”

+COPN:

+COPN: “502013?,”TMTOUCH”

+COPN

+COPN: “502016?,”DiGi”

+COPN: “502017?,”TIMECel”"

+COPN: “502019?,”CELCOM GSM”

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