Using the test methods outlined in the arducopter wiki, it seems that the method described does not give the intended results if the receiver uses sbus/cppm such as the FrSky X8R.
Is there an updated test method to verify failsafe for this type of receiver?
Here is my experience:
I have a FrSky X8R which I think I have configured for Option 2 Failsafe (no pulse/signal). There doesn't seem to be any obvious way to verify that no signal is set rather than option 1.
I followed the instructions on the Arducopter wiki ([url]http://copter.ardupilot.com/wiki/throttle-failsafe/#set-up_for_no-signal_method[/url]) but did not see the same test results.
All tests powered via USB and with MP connected to Pixhawk. Radio failsafe settings in MP are "Enabled always RTL", FS Pwm = 960 (my low THR value is 982).
Radio is 9XR Pro running latest firmware (ersky 9x 218).
When I turn the transmitter off to simulate a communication failure, *ALL* the Radio IN bars go to zero/white. In the demo videos only the throttle bar (3) drops to zero.
EDIT: It seems that this may be because I, and others seeing this, are using Sbus/CPPM on the 8XR receiver.
It is not possible to run test 2 since if the throttle stays at zero, the Pixhawk will disarm itself!
Seems to work OK apart from showing no radio IN bars after switching off the TX. On completion, I did notice that the safety switch on the Pixhawk stays on solid red even though the MP display shows Disarmed/Failsafe.
The Pix disarms at the end of test 3 so impossible to continue this test. Cannot arm again after the failsafe without powering off.
So 1 out of 4 is not exactly reassuring . . . .