GSM SIM 300 Modem with RS232

[pratti]

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.

 

[horace1]

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.

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/

 

[embpic]

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.

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