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  1. thunderbird

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    Not sure why when i start p4 and its beep beep beep
    when it lift above from ground the beeping stop
    any idea why?
     
  2. msinger

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    Try recalibrating the remote controller in the DJI GO app.
     
  3. thunderbird

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    I just calibrated then started the P4
    Only difference i made in settings i enabled Grid+Diag
    Im not sure thats causing the beep
    but when i land there was no beep
     
  4. msinger

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    Are you confirming that you recalibrated the remote controller and it's still beeping?
     
  5. thunderbird

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    yes, I recalibrated and it beep
     
  6. msinger

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    Is the battery low?
     
  7. thunderbird

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    No battery is full, just back home and trying indoor to start up and still beep
     
  8. msinger

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    Please post a video showing what happens as you turn on your remote controller.
     
  9. thunderbird

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    No warning message or anything
     
  10. thunderbird

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    Ok Im an idiot
    I did compass calibration but not IMU
    I just did IMU calibration and the beep gone, I cant believe it i flew with that this morning without IMU calibration, What IMU calibrate anyway
     
  11. msinger

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    The IMUs :)
     
  12. r62ewa

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    Your beeping issue sounds more like it's stemming from your Obstacle Avoidance system when still on the ground. Mine beeps as well during takeoff at times if the ground is irregular in front of the aircraft and the OA system senses the ground and gives the warning beeps. Once in the air everything is fine. This sounds like the same thing you are experiencing?
     
  13. thunderbird

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    It's not the oa that's for sure
     
  14. Justgregg

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    Mine did that same thing. It sounded like the crash avoidence warning, but there were no bars in the pilot app. Weird! It quit doing it now. It flew fine. Im sure if it was an imu issue, th go app would let you know.
     
  15. Sim597

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    IMU stands for a "Inertial Measurement Unit" and these unlike GPS try and keep your position known without the aid of timing via satellites, so if no signal, it can still fly steady and know it traveled 5' one way and 7" the other, not so much for up and down except there probably is altitude input from IMU to flight controller for stability reasons and also give the flight controller the right information to fly level, the flight controller decides to pitch when controller tells it to, but the IMU is what it refers too for accurate input, done hundred of times a second. This is needed for control of the craft, and its own internal guidance, basically, it's an electronic gyroscope, thus it needs calibration from time to time because it's very precise but subject to becoming corrupted due to the tiny tiny parts that do move inside the chip.


    Sent from my iPhone using PhantomPilots mobile app
     
  16. Sim597

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    The reason we calibrate IMUs is because over time, the tiny differences aggregate to larger and larger errors, resulting in poor performance and accuracy suffers. They actually contain gyroscopes, and accelerometers, and maybe magnometers X3 for each


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  17. thunderbird

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    I went to same place to fly again, It start beeping again, Did IMU calibration and took off and no beep
    The surface is not even, I took off in grass, I wonder if that makes the IMU need to be calibrated
     
  18. Stevie_UK

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    Even short grass can give obstacle warning beeps, not saying that's the case here but something to think of.
     
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  19. techvx

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    I think there was a similar post and it turned out to be the avoidance system .... I would take it out somewhere flat ... give that a go :) happy landings


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