Need help in RF modules

I'm doing my final year project regarding the RF modules and it will operate in the 433Mhz band.I'm using PIC16F877A.what i want to do is transmit the data from the 4x4 keypad which i pressed and then display it on lcd after the receiver receive the data.For example, if i pressed '1' at keypad, the character that displayed on lcd in receiver part is also '1'. I hope anyone here can give me any advice or usefull information regarding the solution of my project.?? I will appreciate it.

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