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Hello all,

I'm "happy" to see that others are having the same issue as me. After searching for 2 days I can't understand how this issue is fixed.

My story is the same as yours, I'm using 16.09, the first vehicle wizard setup worked without any issues. The second attempt "stuck" at "preparing mixer settings" and I can't continue from there. I tried to go in Configuration and click "Save" but the red X symbol is always there.

I tried all possible solutions in this thread with erase, upgrade, rescue, re-flashing. Everything. I tried in Mac and Windows. I tried both 15 and 16 Librepilot versions.

Is there any solution after all?

Thank you!
General Discussion / Re: Did anyone flash a Revo with next and return it? (I got it)
« Last post by karla on February 16, 2020, 01:10:51 am »
In January I bought four revos from that honk kong online store. They are shipped to a friends address in Hong Kong and waiting to be sent to me when I get back to BJ (virus self isolation at the moment).
I will check what software they have.
General Discussion / Re: Did anyone flash a Revo with next and return it? (I got it)
« Last post by jdl on February 15, 2020, 10:07:39 pm »
I've recently bought two Revos from this seller but didn't pay attention what firmware they had on arrival. I guess (this was months ago) the first one had 16.09 on it but I'm not sure at all about the second one.
I've immediately flashed them with the r735 based build I currently use and checked their hardware, tests went ok.

As far as I know, this seller is a real store in HK, not a reseller: Last Revo I've bought directly from his online store, outside of ebay.
General Discussion / Did anyone flash a Revo with next and return it? (I got it)
« Last post by TheOtherCliff on February 15, 2020, 06:25:58 pm »
I bought a Revo and it came with LP next on it (git 8c101adc which is also known as R782).  That seems strange, so I wonder if if has a problem and someone returned it.

I bought it from ebay seller porcupinerc, but the ebay seller could be a drop shipper, so it could have come from anywhere.

Likewise: Has anybody bought a Revo that came with LP next on it?  So maybe this is normal?

No pins ever soldered on it.  Baro has +- 0.5m noise.


Info: This Revo comes with pins unsoldered, but comes with both the horizontal and vertical pins.  It comes with a short range coil antenna.
General Discussion / Re: Installing on Ubuntu 19.04 and newer
« Last post by TheOtherCliff on February 14, 2020, 04:48:13 am »
This is a general issue with apps on Linux.  Different "versions of Linux" and different versions of support libraries (like QT).  For LibrePilot, the thing that bites me the most is QT, OSG and OSGEarth versions.

For some apps, I have at times used videbcontrol to edit the dependency list in the *.deb file and then made some old name links to the new libraries if needed.  A more standard way to TRY to fix this would be to download the correct library versions (perhaps from an old Ubuntu version) and see if you can get them to install using dpkg -i.

Another (developer) solution might be to package LP up (including all dependencies) using one of the containers available:

I also recall installing qt56 from a downloaded qt installer (, 5.6.3 is available and you should probably use that instead) to the default system location ... and each time before building, running (sourcing) a script that set all the environment variables to point to the download / installed version rather than the system version.  I don't remember why I did this rather than install with 'make qt_sdk_install' / 'make build_sdk_install'.  It may have been when we were having some issues with the QT download location and QT install options and the normal make script wasn't working.
General Discussion / Installing on Ubuntu 19.04 and newer
« Last post by pczekalski on February 13, 2020, 04:56:52 pm »

Is there a way to install LibrePilot on Ubuntu 19.04 or newer?
So far going through PPA is no longer an option cause of lack of repository maintenance, going through dpkg issues number of "non downloadable" dependencies:
The following packages have unmet dependencies:
Code: [Select]
librepilot : Depends: libopenscenegraph99 but it is not installable
              Depends: libopenthreads14 but it is not installable
              Depends: qt56base but it is not installable
              Depends: qt56declarative but it is not installable
              Depends: qt56multimedia but it is not installable
              Depends: qt56serialport but it is not installable
              Depends: qt56svg but it is not installable

Is there any other way to install without building from source?


General Discussion / Re: Link roll and pitch
« Last post by TheOtherCliff on February 13, 2020, 08:12:23 am »
It just makes the PID slider for each move in sync with the other, so you get the same PID for roll as you get for pitch.  This is often used on quadcopters where front to back is the same as left to right.

Be aware that inertia and PID isn't exactly the same when the length of the battery is say fore and aft.  There is slightly more rotational inertia fore to aft than left to right in this case.  The difference isn't usually worth worrying about for a typical (non-professional) user.
General Discussion / Link roll and pitch
« Last post by MGreenbeck on February 13, 2020, 12:01:05 am »
What happens when you click all check marks for link roll and pitch? How will the drone behave?
Chinese / Librepilot-配置电流电压计
« Last post by xfce on February 12, 2020, 01:29:38 pm »
描述Revolution和Revolution Nano如何配置电流电压计



假设3S电池,电池电压12.6V,电阻分压比为R2:R1=3:1,采样电压为3.15V<3.3V, 对应的比例因子为4

System页面>Settings/Hwsettings,使能电池模块OptionalModules > Battery > Enable;
ADCRouting > adc0 > BatteryCurrent
ADCRouting > adc1 > BatteryVoltage




Deutsch / Re: GPS Mode (INS13) führt zu chaotischen Bewegungen
« Last post by TheOtherCliff on February 11, 2020, 01:26:36 am »
Dies wird normalerweise durch ein Magazinproblem verursacht. Montiert in die falsche Richtung zeigen oder Mag Rotationen nicht richtig eingestellt oder falsche Kalibrierung.

Hier ist eine alte englische Seite, die viele Debugging-Informationen enthält.


This is usually caused by a mag issue.  Mounted pointing in the wrong direction or mag rotations not set correctly or bad calibration.

Here is an old English page that has a lot of debugging information.
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