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Re: [Paparazzi-devel] Failsafe

From: Romney, Jefferson S
Subject: Re: [Paparazzi-devel] Failsafe
Date: Sat, 7 Apr 2012 03:52:33 +0000

That's what I have and it definitely does not work. the throttle goes down 
lower than the minimum pulse but failsafe doesn't activate.
From: address@hidden address@hidden on behalf of Christophe De Wagter 
Sent: Wednesday, April 04, 2012 12:52 AM
To: address@hidden
Subject: Re: [Paparazzi-devel] Failsafe

There should be a simple solution, although I never tried it myself:

The radio xml has defines for minimal pulse and maximal pulse, nr of pulses, 
repeat time etc... If your input is beyond these values, the signal is 
rejected: Lost

So if you put a minimum of 1.00 millisecond and you are sure in normal 
conditions your pulses are always from 1.1ms to 1.9ms, except during failsafe 
where the throttle pulse becomes 0.8ms... then you should have what you want.

Be a bit careful that if later you would inadvertently add a dual-rate with 
125% on your transmitter and turn hard other pulses might also become very 
small and then the whole pulse train would be detected as BAD.


On Wed, Apr 4, 2012 at 12:28 AM, Romney, Jefferson S 
<address@hidden<mailto:address@hidden>> wrote:
I am trying to get my plane to go into home mode when RC signal is lost but the 
only way it seems to know that the signal is lost is when I unplug the ppm 
signal. when my reciever loses link it sends an extremely low value on the 
throttle channel. how do I make the Autopilot recognize this as lost RC signal?

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