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    I just found this after seeing your other post.

     

    I do not know the code well enough to say, but I think I know one part of this to help.

     

    From the outside (not from the internal state) I can say that when it boots, the pilot is waiting for two things before anything normally happens. The pilot wants the GPS to get a fix. Because when the motors are armed by the pilot (human) thinks like "launch" location are set in the APM. 

     

    After that, (which you do not have to wait for, but it is normal) then the pilot will "arm" the motors, normally with the RC yaw pushed hard left, and mode is Stabalize. The motors do not arm w/o these two settings. So APM is waiting for that signal. Without that, you will see the green light is blinking on the APM (assuming you have it on, and a LiPo plugged in, and ESC/motors ready)

     

    Until it is armed, in normal flight mode, it will just sit on the ground. It does not matter what mode, (I have not tested this, but that is my understanding and experience.)

     

    In my few flights, the basic procedure (ignoring checks and tests)  I wait for GPS. I make sure I am set for stabilize, and throttle is zero. Then I arm; and I look for the solid green light on the IMU. Add some throttle and make sure it is stable. Lift off. After I lift off, and move the quad to a safe distance, I can switch to alt_hold, loiter, or auto, etc.

     

    When I am done, I expect to be in loiter, I take over with alt_hold or stabilize, and I land it manually.

     

    Hope that helps. I am new also, but that is what I do, and I think might help you to understand some of the things you would need to change to begin removing a need for RC. I think, though, RC is important for safety.

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