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"
GPRS COMMANDS:
Command Description
AT+CGATT ATTACH/DETACH FROM GPRS SERVICE AT+CGDCONT DEFINE PDP CONTEXT AT+CGQMIN QUALITY OF SERVICE PROFILE (MINIMUM ACCEPTABLE) AT+CGQREQ QUALITY OF SERVICE PROFILE (REQUESTED) AT+CGACT PDP CONTEXT ACTIVATE OR DEACTIVATE AT+CGDATA ENTER DATA STATE AT+CGPADDR SHOW PDP ADDRESS AT+CGCLASS GPRS MOBILE STATION CLASS AT+CGEREP CONTROL UNSOLICITED GPRS EVENT REPORTING AT+CGREG NETWORK REGISTRATION STATUS AT+CGSMS SELECT SERVICE FOR MO SMS MESSAGES AT+CGCOUNT GPRS PACKET COUNTERS
https://www.pantechsolutions.net/wireless-boards/sim900a-gsm-modem
IS THERE ANY WAY TO VOICE ALONG WITH ATD COMMAND?
I would like to cause for it and a solution for this.
Hi,
I’m using a GSM module to send a text message. But sometimes I receive “>\s” as output which is prompt to send SMS even if I just send an simple AT command to check Modem.
Hello,I want to use Arduino sim900A as a SNMP agent.How can I configure it?
what is the command for message receive alert
hi sir
I am doing iot project and I am sending the message to multiple numbers at the same time please help me
Commands where to write
hi all,
i need to block all the incoming text messages. what command should i use? how to do it?
thanks in advance
hye..how if i want to sent sms to gsm to trigger an output?
Use a microcontroller
I want to SMS send with just a mobile missed call
Hello,
Need some help. Just bought an GSM Modem with SIM900A. Tried to connect the modem to the GPRS but ended up with fail. I’ve been already followed the GPRS command that been shown as above. Please someone explain to me why the GSM modem keep showing ERROR while i execute those GPRS command above.
Make sure, the connections are correct, like 3VR on GSM to tx0 on TTL to USB converter, 3VT on GSM to rx0 on TTL to USB converter and GND to GND. power supply too, 5v or whatever your modem needs