Replies

  • Developer

    Hi Thomas soory to hear about that.

    This one seems quite simple. You did loose radio control (in the logs we can see that when altitude was around 30 meters).

    Because you did not setup radio failsafe (you can see that in the log too  FS_THR_ENABLE = 0), the copter did fall instead of returning to home or landing (depending about GPS availability).

    You should watch those Wiki pages about Failsafes and setup your radio and APM board accordingly :

    http://copter.ardupilot.com/wiki/failsafe/

    http://copter.ardupilot.com/wiki/gps-failsafe/

    And this page for general GPS navigation informations (usefull to know about GPS limitations for returning to home and auto modes) :

    http://copter.ardupilot.com/wiki/common-gps-how-it-works/

    Do not forget that returning to home will only work when GPS is available. If no GPS is available and a radio failsafe do occur, the copter will wait for 5 seconds and will land.

    Another problem : your VCC voltage is too high. You are between 5.7 and 5.9V. The specified limit is 5.5V.

    You should check you power supply or add a 3DR power module to control battery voltage, so that you can enable the battery failsafe. The 3DR power module will give the right voltage to the APM board at the same time (do not forgot to remove JP1 so that the ESCs cannot power the board at the same time).

    http://copter.ardupilot.com/wiki/common-measuring-battery-voltage-a...

    Here you will find useful informations to see how to power the APM if you do not use a 3DR power module :

    http://copter.ardupilot.com/wiki/common-apm25_overview/

    Happy flying !

    Olivier

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