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  • #1 by ched999uk on 04 Jun 2018
  • I am running bf 3.2.2 and sometimes when I plug in a charged battery I get the normal esc startup beeps but then get a continuous beep from the buzzer. My tx is receiving telemetry so rx is working. If I unplug battery and plug in again (sometimes it takes 2 tries) it normally works fine.

    Any thoughts what might be the issue?
    Cheers
  • #2 by UrbanFPV on 04 Jun 2018
  • You could try turning off all the beep configs in betaflight and gradually turn each one back on to isolate the offending one.

    There are some you won't need on anyway.  I've got this with BF 3.3.x on one of my quads, but I think I damaged the FC due to dodgy soldering (accidently got some solder across a couple of the pins on the microprocessor).  I solved by removing the beeper  for now and using the dshot esc beeper instead :-/
  • #3 by Jakalas on 04 Jun 2018
  • Could also be that the current sensor is not reading correctly and is detecting to high input voltage, resulting in the warning beeps.

    The fact that it goes away after unplugging and re-plugging the battery a couple of times could mean that it's very close to the threshold and by slightly running the battery voltage down is causing it to drop back into the nominal voltage threshold according to the FC, hence why it stops beeping.

    Have a look at the Power & Battery tab in Betaflight for the settings, or alternatively as UrbanFPV guested, disable the BAT settings under Beeper Configuration section on the Configurations tab.
  • #4 by mitchell.atheis on 04 Jun 2018
  • I have had a recent problem with my buzzer like this, Since i enabled 'Dshot reverse motors' on my quads, then disabled it soon after not getting it to work properly. I now get a constant beeping when i plug a lipo in until my Tx is turned on and all the sticks are in default position  :hmm:
  • #5 by ched999uk on 04 Jun 2018
  • I have had a recent problem with my buzzer like this, Since i enabled 'Dshot reverse motors' on my quads, then disabled it soon after not getting it to work properly. I now get a constant beeping when i plug a lipo in until my Tx is turned on and all the sticks are in default position  :hmm:
    Cheers.
    I think that is the standard behaviour. It is to remind you to turn on tx Before plugging battery in!!!

    My tx is on and rx is sending telemetry data back to tx. So I know tx/rx is OK.

    Cheers.
  • #6 by mitchell.atheis on 04 Jun 2018
  • The reason i said that is because i think there must be some hidden buzzer options which triggers it off, I have all my buzzer options turned off in the BF config and it's still going off. Unless there is some sort of glitch ?

    Your problem sounds random as opposed to my situation though.
  • #7 by Lamaule on 04 Jun 2018
  • This will be the battery scaling factor in betaflight. I had this and they changed the default value recently. It causes the voltage sensor to read over 16.8v if you're 4s - mine was 17.1v. this causes an alarm to be triggered. Lower the scaling factor and you'll be fine. It should read 16.8 on a full battery and no more!
    I am running bf 3.2.2 and sometimes when I plug in a charged battery I get the normal esc startup beeps but then get a continuous beep from the buzzer. My tx is receiving telemetry so rx is working. If I unplug battery and plug in again (sometimes it takes 2 tries) it normally works fine.

    Any thoughts what might be the issue?
    Cheers

    Sent from my VTR-L09 using Tapatalk

  • #8 by mitchell.atheis on 04 Jun 2018
  • This will be the battery scaling factor in betaflight. I had this and they changed the default value recently. It causes the voltage sensor to read over 16.8v if you're 4s - mine was 17.1v. this causes an alarm to be triggered. Lower the scaling factor and you'll be fine. It should read 16.8 on a full battery and no more!
    Sent from my VTR-L09 using Tapatalk
    Would never of thought to look at this, thanks!
  • #9 by Lamaule on 04 Jun 2018
  • Lol, me neither. Took me months to resolve my beeping quad! 🤣
    Would never of thought to look at this, thanks!

    Sent from my VTR-L09 using Tapatalk

  • #10 by atomiclama on 05 Jun 2018
  • Could be that the micro on the FC is not starting up properly.
    These will help work it out.

    What does the buzzer do at startup ?

    Does it do multiple beeps then stay on or does it just go on straight away.

    What does the status led do at startup?

    If you get it into the continuous beep could you then attach a pc to the USB port and see if it is running.

  • #11 by ched999uk on 09 Jun 2018
  • This will be the battery scaling factor in betaflight. I had this and they changed the default value recently. It causes the voltage sensor to read over 16.8v if you're 4s - mine was 17.1v. this causes an alarm to be triggered. Lower the scaling factor and you'll be fine. It should read 16.8 on a full battery and no more!
    Sent from my VTR-L09 using Tapatalk
    Looks like you were correct! Changed scaling factor by 1 and no more continuous beep on battery connection.
    All perfect.
    Well would have been until on last 10 seconds of last batt quad dropped. Then another continuous beep, rx signal lost!!!
    So looks like I have a little tinkering to do tonight  :smiley:

    So thanks very much Lamaule.
  • #12 by Lamaule on 09 Jun 2018
  • Looks like you were correct! Changed scaling factor by 1 and no more continuous beep on battery connection.
    All perfect.
    Well would have been until on last 10 seconds of last batt quad dropped. Then another continuous beep, rx signal lost!!!
    So looks like I have a little tinkering to do tonight  :smiley:

    So thanks very much Lamaule.
    Hey ched - really pleased we got this sorted. It's such an annoying issue and it took me ages to work it out for myself. So pleased it's helped you!

    Sent from my VTR-L09 using Tapatalk

  • #13 by ched999uk on 09 Jun 2018
  • RX all fixed. It was the connector for rx to FC. It had wiggled loose - too many crashes  ::)
    So all ready to go for tomorrow  ::)
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