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GPS v ATTI modes

Discussion in 'Phantom 2 Discussion' started by Hughie, Nov 27, 2014.

  1. Hughie

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    Could someone please clarify how Failsafe operates in various modes. I am assuming that Climb/Return Home/Land has been configured via the Assistant software)


    So, When in GPS mode with the homepoint loaded up, on Failsafe being triggered a full Return To Home will be executed.

    But what happens when Failsafe is entered when :

    - In GPS mode but homepoint was not loaded up at the start of the flight
    - Flight started in GPS mode and homepoint was loaded but flying in ATTI mode.
    - Flight started in ATTI mode and (obviously) homepoint was not loaded up at the start of the flight

    Many thanks
     
  2. Mako79

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    In all 3 situations, home point will be locked the moment the phantom acquires 7 or more sats. Doesnt matter if its on the ground, in the air, in your room.
    When FS is triggered, it will return to point where 7 sats was aquisitioned unless reset by the left 5xflick of the IOC toggle switch.
     
  3. Hughie

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    OK, so the only real difference between them then is that GPS mode offers airborne stability?

    The confusing thing is that it seems the LEDs are the same for no GPS home lock And ATTI mode.
     
  4. RDCF550

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    The LEDs are different, it wouldn't be much good if they were the same.

    Green = GPS mode, home lock or not the first blink is Green.
    Amber (Yellow) = ATTI mode, the first blink is Amber.
     
  5. Mako79

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    Don't get confused with GPS flight mode and GPS Home Position. Both are CRITICAL!

    GPS flight mode is where the NAZA+IMU+GPS assists you in maintaining lateral and vertical stabilised control. In ATTI mode, the NAZA+IMU is on. ATTI will use the IMU barometer to lock altitude - it will not assist in lateral meaning you float with wind. This can cause "drift-aways". And Manual = NAZA with no IMU and no GPS assist = death.

    GPS home position is important as it marks a point for RTH and failsafe. Just look on your radar (bottom left of your phone/smart device), and if it says NA for distance, it means no Home point lock. You can also double check in your Ground station mode. Make sure you get a distance reading, even if its 0.0. This means Home position is found.
     
  6. lake_flyer

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    Please, don't mix up the Vision2+ with the Phantom 2.
    It is confusing enough as it is for new users. :shock:

    The OP clearly had a reason for posting in this forum and not the Vision. I assume he has a P2, otherwise he is in the wrong place.
    The Phantom 2 has no phone/smart device. Unless after market FPV is installed.
     
  7. Hughie

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    Yes I have a P2
    Thanks for all replies.
     
  8. TeamYankee

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    Remeber.. if you are in "Phantom" mode then you will see one set of green rapid flashes - indicating Home Lock and you are ready to fly.
    If you are in NAZA mode you will see 2 sets of green rapid flashes... first one is for IOC (compass orientation lock) and the second, shortly after the first, will be for GPS Homce Lock..

    Only fly when you see the second set of flashes.. Or if you have a fail-safe event the quad will fly to some random place where it acquired the last home lock...