pic18f4620 interfaced with sim500w GSMmodule

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ralphbanque

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hello guys,

I am trying to make a project that sends a message to a cellphone number when a door or window is opened.
I am using pic18f4620 and sim500w GSM module.
When i run it on simulation it's ok but on the actual hardware it doesn't work, it becomes stuck at the first part of the program.
Please help and thanks in advance
 

you should provide your mcu code and hardware diagram.
that could be helpful for you
 
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