I am building my first QuadCopter. I got the receiver to bind with my Taranis x9d plus radio but can't get any output to radio calibration in mission planner. I found some interesting video's and articles on sbus and apm but don't have a solution yet. 

Here is what I have seen...

Trying to use SBUS. From what I understand there are three possible solutions.

1.  sbus to ppm convert. telemetry and servo are different not sure this will handle both.

2.  sbus inversion hack  some soldering. one wire for the telemetry one for the servo input. 

3. There is a firmware update for the ATmega32U2 that will convert the sbus siqnal to ppm. This might work but conflicting information on the firmware update.  I would like to find the source code.

a. Still more questions than answers. I read that ppm has slow response than sbus so which of these works best in that area?

b. I could do the soldering on the xr4sb to un-invert the subus signal. I like this idea the best. But I am not sure the APM 2.8.8 supports sbus inverted or not.

I will keep looking but if anyone can help me, please do.

 

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