- power-on the TX in bind mode (bind key pressed upon power-on)

- pairing the PC to TX Bluetooth module with pairing code '0000'

- take note of the serial port added to PC (COMxx)

- connect to that serial via appropriate terminal program (Putty, Realterm, etc)
  with 57600 baudrate

- send this string: '+++'

- you are in program mode, and you can set the TX parameters

- to set the RX parameters, send this string: 'z'  (i.e. press the 'z' key on keyboard)

- power-on the receiver, and you should see its setting on terminal window.