pic18f4620 interfaced with sim500w GSMmodule

[ralphbanque]

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

 

[apolama]

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