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Hello, So far I used a 41Mhz receiver and I had no troubles. I use 2.0.49 firmware

I noticed that when I forgot to calibrate the radio channels, on startup all motors were beeping.

I got a 2.4Ghz for ma Radio (Futaba FF8: T8UHP), I calibrated the channels, tested them in CLI mode. and in APM interface.

But when I power the copter all motor are beeping like nothing is calibrated.

And when I try to arm the motor (throttle down and yaw right) the LED on the board indicate that the motors are armed, so the PPM reception should be OK. but cannot start the motors.

Why All motors are beeping and cannot be used then??

So I put back my 41Mhz receiver for now, but help is much appreciated.

Thank you.