Double yellow on Pixhawk, but I can arm and fly?

Hi everyone. I'm building my first autopilot/pixhawk plane and I'm a bit puzzled.

I hooked the pixhawk up to my PPM-capable Hitech receiver (http://www.hobbyking.com/hobbyking/store/__27175__2_4ghz_a_fhss_compatible_8ch_receiver_hitec_minima_compatible_.html) and ran through set up. I've got an Aurora 9 radio. I got this receiver to attempt to workaround needing a PPM encoder...but my current theory is that this receiver is torpedoing me somehow.

Flashed the pixhawk with latest stable ardupilot firmware during setup (2.77 as I recall). I used mission planner to run the setup wizard, successfully completed compass/accelerometer/radio calibration...I got all "green" on the pre-arming checklist there. I can see the gps registering my house on the map and the plane responds to xyz tilts appropriately.

I'm setting this up on a stock hk sky eye for now.

3D GPS fix is good, flight modes work great, in manual mode I have full control through the radio just like normal...even got the flaps working on channel 5. Other flight modes work as expected. Nothing cooler than seeing stabilize work the ailerons for the first time.

The weird thing is that I've never seen a green light on this Pixhawk since i've plugged it in. I've got double yellow and 4-red flashes on the saftey button. I can arm it with the button and everything works as described above, but I'd sure like to see green. I would love to diagnose and fix this but I can't seem to find the list of things that cause the arming error (double yellow flash).

Thanks for any/all ideas.

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Replies

  • Developer
    If you connect to the vehicle using one of the planers you will be able to see the error message that is indicated by the double flashing yellow LED.
    We also do have one known issue with the pre-arm check on plane http://ardupilot.com/forum/viewtopic.php?f=88&t=5758
  • I have also re-flashed and recalibrated several times across multiple computers and operating systems with no luck.
  • Assuming it is the same as Arducopter, There is a list here: http://copter.ardupilot.com/wiki/prearm_safety_check/

    I'm having a similar issue. I just switched from 2.76 to 2.77 and started having this double-yellow behavior. I was solid green before flashing. Everything still works perfectly fine.  

    I set ARMING_CHECK to 1 thinking Mission Planner would tell me what I'm failing, but  it arms perfectly fine. 

    I have re-calibrated the radio, accelerometers, mag, etc. No dice so far. 

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