interfacing gsm with controller

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aarti159

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hi, i interfacing gsm sim300 module with 89s52. but i m not able to make a call through controller. plz help me out of this. its urgent.
 

amayilsamy said:
Check your AT Commands.

And check your modem properly communicate with microcontroller

Post your Schematic diagram.
Click to expand...

hey, i've done it. there was problem with my gsm... i tried with other gsm then it works..
but now my prb is that my gsm works properly with hyperterminal... but when i connect it with controller it doesn't works properly..
so can anyone help me out from this????
 

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