RE: WK-G011 & TX
when the gyro has a slow flash it means you have changed the initial position of the gyro after you it initliaze with the radio by moving the rudder trim.
first of all can you make sure the TX and rx is really communicating by testing it with a servo. Connect the gyro to ch4 and the gain wire to aux1 and pay attention to the polarity of the wires.
Andy