Oh.... zikri.... you really give me your Uni and course! Then I will really give you source code. Take what is given by Cytron PR16, though it might be using PIC16F and different compiler, you can still modify the code to be compatible with PIC18. Good luck!
What wireless module U use? Normally wireless module use UART interface. You need to study on that. And then, you use assembly, that language make me sick. Can't help you.