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You are here: Home / Replies / hai

hai

|

Microcontroller › 8051 › To interface GSM SIM900 with 8051 › hai

January 14, 2013 at 12:24 pm #8951
nidhin.k
Participant

hai PRAJWAL………………

 

 

 

for sending and receiving sms you must initialaze ur gsm modem.

 

initialization commands are (steps)

 

AT                               /*you will get a reply “OK ” ,if the modem is working*/

AT+CMGF=1             /* convert to text mode  */

AT+CNMI=2,2,0,0,0    /*receive msg , after reading it will automatically deleted  */

 

 

for sending

 

AT+CMGS=”mobile number”<press enter key>

<type msg>

<press control key+Z>

 

 

for calling….

 

 

ATD<mobile number>; <press enter key>

 

 

 

 

 

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