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ST12 random beeping while flying

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I just purchase a refurbed Q500 and it came with an ST12 controller instead of the ST10+. All seems fine except the controller randomly beeps and I can’t figure out why. I was flying without a card so not sure if this could be it. Any thoughts much appreciated.
 

WTFDproject

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I don't think the beep is related to the card. I just removed the card from an ST12, bound it to a Q500, and flew a few minutes in hover about 10 ft. altitude. No beeps.
Is the beep sound a sharp "Beep", or more of a Buzz?
Did you notice any changes on-screen, such as loss of GPS, warning screens, any differences from normal indications?
Is the interval between beeps completely random, or does it seem to follow some pattern. Especially, does it seem to occur in coincidence with any control function?

I don't have much to offer. However, many odd behavior issues can be cleared by deleting the existing model, creating a new Model, and binding the ST-12 to the new model.
I would also check the "hardware monitor", and look for any responses that are jerky, uneven, slow to activate, slow to return, etc.
 
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Completely random with no identifiable screen indication. Not associated with a particular function. I will do as you suggest. Thank you for taking the time to trying to reproduce. Will post response with results.
 

WTFDproject

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It is normal to beep when the camera angle adjustment (K1) and the speed (K2) are moved. Mine does not beep when the landing gear (S1) is actuated. (I think S1 is what you meant by "left toggle"?) However, mine does beep if you rotate the camera Yaw knob (K3). The difference in (S1) and (K3) doesn't seem important, especially since they have no purpose on a Q500.
These beeps are just audible feedback of control movement.
Sounds like your ST12 is OK.
 

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