Apm radio not active

so i got my raspi 2 and navio+ connected to apm planner 2.0 on my mac and gps seems to work fine, but now i cannot get my radio connected , i can see when its acive or not on my reciever but apm planner cannot detect it. I am using a turnigy 9x and a ppm encoder. What may i have done wrong?

@Daniel_Grenehed could you please provide a close-up photo of your setup?


Do you have a servo you can plug into the receiver and test if it provides PWM signals on channels? Or maybe an oscilloscope.

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