Gsm with microcontroller interfacing dout

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This topic has 1 reply, 2 voices, and was last updated 11 years, 11 months ago by AJISH ALFRED.

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March 17, 2013 at 11:58 am #2192

ritesh
Participant

Hello friends

I want to interface gsm module sim 300 with p89v51rd2 . If i interface gsm with hyper terminal it working but i have problem with interfacing with microcontroller.

If i interface gsm with microcontroller so it is require max 232 ic? . It is already 1 max232 ic will be given on gsm module.

Thanks

March 17, 2013 at 5:05 pm #9337

AJISH ALFRED
Participant

Hi Ritesh,

If your gsm module has a max232 IC, then you must use a max232 IC at your microcontroller side also. If there was no max232 IC then you could have connected it directly to the microcontroller.
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