I connected it, when the trasmitter was very close to the receiver. The strange thing is the light stops flashing (which shows they are connected) but it says no signal. Do you also know something about the 'no aileron input' problem?
I'm building a quadcopter with a KK2.1.5 and a 6ch Tx Rx. I've installed the programm for the KK and also for the transmitter. I can connect the transmitter and receiver, because the red light stops flashing if I push the 'blind range test' button on the receiver. But when I look on the KK2.1.5...