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Permalink Reply by Jason Willis on July 30, 2012 at 12:01pm

No you can not with a stock 9x but if you get a FrSky module and receiver that do CPPM you can do it.

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Permalink Reply by msev on July 30, 2012 at 12:09pm

Well according to this demonstration it does work: http://www.youtube.com/watch?v=gVKtAttbBa4

The question is how did they set it up..

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DeveloperPermalink Reply by Andreas M. Antonopoulos on July 30, 2012 at 12:19pm

Yes you can. You must flash your PPM firmware on the APM2 board with the latest PPM firmware.

Once you do that, throttle failsafe and RTL work perfectly (I have a stock 9x, with original radio module and it does failsafe fine).

See instructions: 

http://code.google.com/p/arducopter/wiki/APM2Encoder

http://code.google.com/p/ardupilot-mega/source/browse/#git%2FTools%...

2.2.68 is the latest firmware. 

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Permalink Reply by msev on July 30, 2012 at 12:31pm

Thank you for the answer.

I'm thinking of buying also the Crius all-in-one pro. It has Arduplane 2.40 ported by Jean-Louis..

https://code.google.com/p/ardupilotdev/downloads/detail?name=Ardupl...

http://www.rcgroups.com/forums/showpost.php?p=21976368&postcount=1

Would you be so kind and look into the code if it is set-up like that so it will trigger RTH on loss of signal?

I would be eternally grateful! :)

And another thing Andreas what is your max range with the stock receiver?

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DeveloperPermalink Reply by Andreas M. Antonopoulos on July 30, 2012 at 2:04pm

I have no idea if the Crius will work with the 9x failsafe. But there's an easy way to find out: connect it (no props), power it up and at 75% throttle, turn off the TX. If it keeps spinning, you have a problem. If the motor stops, the failsafe worked. 

Whether that triggers RTL, is something you can see on your GCS when you cut throttle. 

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