RS232 wireless communication pic to pic

[maverik46]

Hi, I'm an Italian Engineering student and I have to create a RF connection between two PIC18F452 trough the UART and two Aurel Transceiver ( RTX-MID-5V ). I don't need to transmit many byte because I just need to send a Wi-Fi signal to the other Pic to trigger a procedure.
The signal will consist of only an identification code of the pic called ( because in the main project I will have two more Pic and will need to understand what pic was called).
I had thought to use a simply RS232 protocol with parity bit error control but i don't understand how to implement the parity error control in CCS. I have to calculate the parity bit by software or the uart automatically add it on the TX string ? On the receiver i have to do parity error control by software or the UART do it automatically ? I am very confused by this question...
Are there some examples of pic to pic RS232 communication with parity error control ?
Thanks