GSM SIM 300 Modem with RS232

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pratti

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I read older thread and actually I am getting confuse on that does "GSM SIM 300 Modem with RS232" need MAX 232 for connection?could anybody give me any idea of this.
 

pratti said:
I read older thread and actually I am getting confuse on that does "GSM SIM 300 Modem with RS232" need MAX 232 for connection?could anybody give me any idea of this.
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the sim300 generally has both TTL and RS232 serial interfaces - if so you should be able to interface directly to a micro without the need of using a MAX232

have a look at this thread
https://www.edaboard.com/threads/199301/
 
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    pratti

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yes u can directly connect with PC with RS-232 interface or connect it to controller directly from GSM processor to controller.
but u will need voltage converter in between.

- - - Updated - - -

if you use low voltage level then voltage converter is needed.
 
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