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gsm modem - at commands Technical Information
 
 

BluOcean Modems - Use By Tons Of Software Houses And Programmers In Their SMS Programming. Below Are Some of The Commonly Used Information For Reference.

OEM Modems Are Available For Bulk Purchase

AT Commands

AT Commands Meaning
AT+CSCA="+651234567" Set Message Center Number
AT+CGMI Get the name of manufacturer
AT+CGSN Get IMEI number (International Mobile Equipment Identity)
AT+CGMR Get software version
AT+CIMI Get IMSI number (International Mobile Subscriber Identity)
AT+CNUM MSISDN
AT+CPAS Get mobile phone activity status
AT+CREG Get mobile network registration status
AT+CSQ Get radio signal strength
AT+CBC Get battery charge level and battery charging status
ATD, ATA, etc Establish a data connection or voice connection to a remote modem
ATD, ATA, AT+F* Send and receive fax
AT+CMGS, AT+CMSS Send SMS messages
AT+CMGR, AT+CMGL Read SMS messages
AT+CMGW Write SMS messages
AT+CMGD Delete SMS messages
AT+CNMI Obtain notifications of newly received SMS messages
AT+CPBR Read phonebook entries
AT+CPBW Write phonebook entries
AT+CPBF Search phonebook entries
AT+CLCK Opening or closing facility locks
AT+CPWD Changing passwords
AT+CMEE=n Enable certain error messages
n= 0 disable +CME ERROR: <err> result code and use ERROR instead.
n= 1 enable +CME ERROR: <err> result code and use numeric <err> values.
N= 2 enable +CME ERROR: <err> result code and use verbose <err> values.
AT+COPS=<mode>, <format>, <operator> Change the GSM network
<mode> is used to select whether the selection is done automatically by the ME or is forced by this command tooperator <operator> given in the format <format> and may be:
= 0 automatic (<operator> field is ignored).
= 1 manual.
= 2 deregister from network.
= 3 set only <format>.
= 4 manual / automatic (if manual selection fails, automatic mode is entered).
<format> :
= 0 long alphanumeric <operator> (default value).
= 1 short format alphanumeric <operator>.
= 2 numeric <operator>.
<operator> string type given in format <format>; this field may be up to 16 character long for long alphanumeric format, up to 8 characters for short alphanumeric format and 5 characters long for numeric format MCC/MNC codes)
AT+CBST Change bearer service type
AT+CRLP Change/configure radio link protocol parameters
AT+CPMS storage of SMS messages
AT+CSAS Save configurations of the GSM/GPRS modem
AT+CRES settings related to SMS messaging such as the SMS center address
AT+CMGF=1 instruct the GSM / GPRS modem to operate in SMS text mode
AT+CMGL="ALL" List all the messages
AT+CNMA New message acknowledgement

 

 

Change Baud Rate from 115200 to 9600

1. Start-> Accessories-> Communication-> Hyperterminal
2. Open new connection
3. "Connect using:" the correct COM port, you will see a
windows->change Bits per second to "115200"
4. type "ATE1" and press Enter (it'll show "ok")
5. type "AT+IPR=9600" and press Enter (it'll show "ok")
6. click on "disconnect" icon
7. go to Properties and change the Bits per second to "9600"
8. type "AT&W" and press Enter (it'll show "ok")

Then it'll be changed to 9600.

^Back to Top

 

Change Baud Rate from 9600 to 115200

1. Start-> Accessories-> Communication-> Hyperterminal
2. Open new connection
3. "Connect using:" the correct COM port, you will see a
windows->change Bits per second to "9600"
4. type "ATE1" and press Enter (it'll show "ok")
5. type "AT+IPR=115200" and press Enter (it'll show "ok")
6. click on "disconnect" icon
7. go to Properties and change the Bits per second to "115200"
8. type "AT&W" and press Enter (it'll show "ok")

Then it'll be changed to 115200.

^Back to Top

 
 
 

 

 
 
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