Comment by Saiful Azuwan on April 29, 2009 at 6:31pm

Excellence...

Comment by Michal B on April 29, 2009 at 6:51pm

Jordi, will this work with 2.4GHz digital RC receivers? As I know, these RC's don't ever send invalid pulse, and in case of signal lost, my Spektrum RC keeps last values for all channels except throttle which is cut.

3D Robotics Comment by Jordi Muñoz on April 29, 2009 at 7:07pm

If you have an spektrum you can pre propgram it to switch to RTL, like i do. I normally fly with spektrum.

Comment by Michal B on April 29, 2009 at 7:24pm

This is from Spektrum AR 6100 manual:

SmartSafe
Your AR6100 features SmartSafe fail-safe programming. SmartSafe prevents accidental motor operation before the system connects and, in the unlikely event of signal loss, SmartSafe drives the throttle to a preset (off) position. With SmartSafe, if the receiver is turned on before the transmitter, all channels but throttle will go to their fail-safe position stored during binding, while the throttle channel will not generate a pulse so as to not arm the electronic speed control. After the system is connected, if loss of signal occurs, the throttle will be driven to a preset fail-safe position, normally low throttle (set during binding) while all other channels will hold their last known position.

I don't see option to preprogram RTL toggle channel to some fixed value when signal is lost. The channel would keep last position.

3D Robotics Comment by Jordi Muñoz on April 29, 2009 at 7:49pm

LOL, that version do not have this functions =(, i also purchased the AR6100, and nothing... Only the "AR7000" for DMS2 and any receiver that cost more than $100 dlls!! Otherwise there's no way spektrum can do RTL when you switch it off, with or without latest attiny firmware.... One solution could be to solder one wire form the receiver LED, it shut downs when the signal is lost, so we can use it for that...

Comment by dydx on April 29, 2009 at 8:28pm

I just checked-out the code using: svn checkout http://ardupilot.googlecode.com/svn/trunk/ ardupilot-read-only

Has/will this be committed to the repository? I can't see it there?

Moderator Comment by Chris Anderson on April 29, 2009 at 8:42pm

@dydx: it's just in the downloads, not in the subversion repository.

Comment by Reto on April 29, 2009 at 10:08pm

Is the distance threshold implemented in v1 still there in later versions as an alternative RTL failsafe for 2.4gHz users?

Comment by Michal B on April 30, 2009 at 12:13am

jordi: another solution is to watch throttle signal, if it goes low, RC may be out of range. Then do something special like RTL. But one must consider this when manually controlling plane, manually gliding would not work then.

Comment by simonl on April 30, 2009 at 4:23am

How about switching to RTL if throttle low AND other channels hold for (say) 2s? Would this work for all Rx's?

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