Problem with half duplex

Hi everyone,

I am trying to implement a transmitter receiver handshake in which the
transmitter first sends a ‘Ready to send’ and the receiver upon
receiving it
sends a ‘Clear to send’ back. After this the TX is supposed to send data
and
RX is supposed to receive it which they are not being able to do. I have
tried using a single antenna with auto tr mode enabled. I have also
tried to
use two separate antennas at different frequencies however none of these
work. I would appreciate it if someone could guide me regarding this.

Regards

Nikhil