Trouble reading RX signals with arducopter configurator.

I have a Futaba T7CAP transmitter w/ a 72Mhz PPM receiver. Calibrating the transmitter via the configurator never succeeds. Here is what I have tried:

1) Verified the receiver works by directly plugging in an esc to the receiver.

2) Verified the receiver is powered when connected to the APM by using a volt meter.

3) Verified the PWM signals are being output on channel 3 by using a bus pirate as a poor man's o-scope. I can see the width of the PWM signals vary by moving the throttle.

4) Reflashed the PPM Encoder firmware onto the APM.

5) Tried the APM sketches to output the raw received RX data. I see no variation in any reading when I move the sticks.

6) Tried the latest Arducopter sketches just released.

 

I've read of people frying a mux. Is there any way I can detect this using a multimeter or running a custom sketch? Is there anything else I should try?

 

Some more information about my setup:

- I am powering the board by a 3 cell lipo and then connecting usb.

- I have the +5V and GND connections from a single ESC powering the APM using jumper wires so I can avoid connecting the ESC signal line during my testing.

- I am using Turnigy Plush 10A speed controllers.

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Replies

  • Are you seeing this behaviour? http://diydrones.com/forum/topics/arducopterng-beta-2-hanging

    Have you tried the RC1 release?

  • 3D Robotics

    3) Could you explain that a bit more? Ch3 of your Rx? APM? Why Ch3?

     

    Can you upload a photo of your board, with the RC and everything else connected?

     

    Even if you fried a mux, it should still receive the RC signals.

     

    My sense is that this is a connection issue. Something's plugged in wrong somewhere. We'll figure it out.

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