SIf your application requires that data be transmitted and received in a full-duplex fashion, it is possible to simulate full-duplex communication by setting the interface baud rate slower than the RF baud rate and setting a few parameters.
When communicating serial data, the transmissions can either be sent in a full-duplex or in a half-duplex mode. In full-duplex communication, data can be sent and received at the same time. Usually, this occurs over two or more separate wires. In half-duplex communication, data can be both sent and received, but not at the same time. RF communications typically send the data in a half-duplex configuration, which is the case with all Digi radios.