Wireless UART RF modules have a standard UART interface and have a built-in protocol. The designer can usually tweak some aspects of the protocol, but the basic structure is defined inside the module. The main advantage of these modules is that the protocol is done. Simply write the data to be transmitted to the serial port and the module handles the transmission and reception automatically. This significantly reduces the processor code development. However; the protocol is common to all users, so some potential for different systems to cross-talk exists. This can be dealt with by the application inside the data payload.