sim300 gsm module simcom ckt diagram

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ronydc

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dear friends..
i have purchased sim300z from simcom. -- a GSM Module.

do any one have the functional ckt diagram ..? tht can make me a great help bcs i have no time left for my exam.

i just need a basic ckt diagram ( and not the pin outs) for connecting it to the pc.
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and secondly,i also want to know that there are 2 serial ports in the module.
one is main and the anotehr is debug. so which one is to be used if the module is to be connected to the microcontroler( 8051 having only TX and rx lines.)

thanks in advance..

-Rony..
 

Hi,

I have a circuit diagram of SIM300C but it is in chinese.
the main COM should be connected to the MAX232-UART port of the micro.

basically, it is a RS232-GSM module. the main connector of SIM300 is connected to your device. the other connector is when you must configure the output/select the GSM band to be used.
 

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