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You are here: Home / Replies / I am connecting the GSM

I am connecting the GSM

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Microcontroller › 8051 › Interfacing GSM module with Microcontroller › I am connecting the GSM

March 4, 2012 at 4:54 pm #7248
Apache79
Participant

I am connecting the GSM Module to the MC with pins 2(tx), 3(rx) and 5(gnd). Should i connect the other pins of the RS232, or short them in any way?

 

I read somewhere that we have to give +9v to pin 7 and -9v to pin 4 of DB9. Is it true?

 

Please guide, 

 

Thanks

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