Ardupilot Failsafe for Turnigy 9x / FrSky module

Somebody mentioned on a previous post that they would like to see some notes on this.  Here's mine!

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Comment by Paul Marsh on July 6, 2012 at 6:53pm

I love your avatar, Mark!  You look like the happiest guy on the planet.  You're either surrounded by family, toys or both.  I'll have what you're having!


Comment by Dean Jones on July 7, 2012 at 12:19pm

Comment by Mark Harrison on July 8, 2012 at 7:36pm

Paul, thanks!!! :-)

Comment by Mark Harrison on July 8, 2012 at 7:36pm

Thanks Dean!  You definitely want one of the JR compatibles

The difference between these two is telemetry and no telemetry.  I've got the older, no-telemetry model.  Get the telemetry model... it's cheaper (!) and I think they're phasing out the non-telemetry units.

Good Luck!

Comment by Jon von Weymarn on November 9, 2012 at 1:00am

Has anyone actually utilized the FrSky modules telemetry with the 9X. There are some hits on google about it but I would like to see it in action and also hear if it's worth the hassle.

Comment by Mark Harrison on November 9, 2012 at 1:11am

@Jon, definitely worth it.  My collected notes are here:

search down for FrSky

Comment by Jon von Weymarn on November 9, 2012 at 1:36am

Thanks Mark, but I couldn't find any info on the actual usage of telemetry with the 9X. Have you bought a separate telemetry screen to attach to the module or programmed the 9X to show the data?

P.S. When I say 9X I mean er9X :-)

Comment by Ovidiu Sopa on December 2, 2012 at 6:04am

I just set up my fail safe using you method, I set the flightmode to RTL and than pushed the FailSafe button on the FrSky receiver. It does work but I'm very sure that when I first time and the only time I set the failsafe , a few months ago after moding my Turnigy 9x, I did it using a different method, which I can't really do it again.

I had to set the throttle channel to send a PWM bellow 980 and I remember I accomplished this by changing something in the LIMITS menu of my 9x (firmware : Er9x) I tried now again and can't make the 9x send a lower PWM. Anyone around to point me in the right direction? maybe you know a link or a video that explains how to "teach" the receiver to send a lower value on throttle channel when it's in failsafe mode.

I don't really understand how the failsafe is triggered now, using Mark Harrison method, anyone around that could explain in a few words, maybe if I understand what's happening I'm more confident in my failsafe setup.

thank you.

Comment by Alex on April 28, 2014 at 9:33am

Hi, I know I come 2 years later...

But for who come here from a google search or another way, here is the solution :

On the Turnigy 9x(r), go in your model settings, you will found at the bottom of the first setting page (1/11) the E.limits setting (extreme limits), enable it, then go to Limits page (6/11), increase the value of the channel 3 to have a PWM value below 780. Then make you failsafe settings on the receiver (push the bind button one time), replace your normal settings on the 9x(r) and you're done.

Hope to help anyone goes here ;) 


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