need help in using GSM modem

hi friends
first of all i thank every one who is spending their time to read this post.

i am doing a project in which i've to send an sms from AT89C51 using (SIM300) GSM modem.
here i am completely new to the GSM technology.
i'm having the modem and i came to know that we should send AT commands in order to communicate.
but i'm a bit confused with those commands.
can any body help me and tell me in breif what commands should be sent to initialise the modem and send an sms.
thank you

praveen
[email protected]

Well simcom modems gets initialized by itself. all you can do is to check health of modem and connection.

Test with following commands

Command: AT
Response: OK or ERROR

Command: AT+CPIN?
Response: Status of simcard.

Command: AT+CREG?
Response: gives you status if sim got registered to network or not

Command: AT+CSQ
Response: Current network strength

You can get more description of these commands in SIMCOM's AT Command manual.

[Topic moved to Embedded GSM Development]

thank you very much
can u plz tell me the syntax to send those commands

I told you to take a look at AT Command manual of simcom modem you are using.

Syntax are same:

ATAT+CSQAT+CPIN?AT+CREG?Try them