interfacing gsm sim300 modem with MC At89s52- doubt

[ashwin sathy]

M working on a gsm based project and the coding part is done .

i have a sim 300 modem with me. now when i test it in PROTEUS simulation via compim on PC it works

while when i test it with AT89s52 MC it doesnt !!!!

My sim 300 already has max232 ,so do i have to inclued another one on my Microcontroller side as m using an rs232 cable?? ..

HELP!!

[Dexter]

yes you have to inclide max 232 after mc 89c52

 

make sure the cable rs232 internal wire rx tx gnd is connecter between the both max 232 in mc and sim 300

[AJISH ALFRED]

YES. If there is a max232 on one your gsm module, you should include on in your microcontroller board also. The following image might give you an idea about it

wysiwyg_imageupload:6428:

Go through the data sheet of max232 and connect the pins correctly

[ashwin sathy]

thanks a ton

[Indrajit Pramanik]

can you give me the code and circuit I have an urgent project submission .

Thankx

[SUVID SUBHASH SADALAGE]

please send me the code

my email ID [email protected]

please reply soon

Thanks

[Author]

Posts