GSM Coding and interface with AT89C51

[imtisal]

Hello,
I am using GSM modem and I am facing looot of confusions,
The first one is that
AT+CMGS and AT+CMGR are the commands for sending and receiving to GSM modem,
How can I receive the msg from AT89C51 through GSM modem. I want to receive the message and want to store in array. I dont know how to do it?
for example, a certain number send me the text 'Hello', How I can able to read the message from MCU (in coding) using AT+CMGR?

Kindly help me, I am doing my final year project. Stucked in it badly,

imtisal

 

[ramanc51]

You have to configure the MODEM to use SIM memory to receive message, then all incoming messages are stored on SIM memory index, each index will have one message. There are two ways to read message from SIM.1)continuously poll SIM memory index 0 if you found new message read it and then delete it for next use.2)Configure the MODEM to send interrupt signal to AT89C51 after receiving new message. By sending AT+CMGR.MODEM will return message from SIM memory to your AT89C51 through serial port. On serial port ISR, you have to decode message according to your requirement.