# QGroundControl version

**URL:** <https://discuss.bluerobotics.com/t/qgroundcontrol-version/1118>\
**Category:** Blue Robotics Software\
**Created:** [May 29, 2017, 2:21pm UTC](https://discuss.bluerobotics.com/t/qgroundcontrol-version/1118 "2017-05-29T14:21:51Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![MMMMK](https://avatars.discourse-cdn.com/v4/letter/m/4da419/32.png) [@MMMMK](https://discuss.bluerobotics.com/u/MMMMK)\
**Post date:** [May 29, 2017, 2:21pm UTC](https://discuss.bluerobotics.com/t/qgroundcontrol-version/1118/1 "2017-05-29T14:21:52Z")

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Hi ，sorry to disturb you  
my QGC version is 3.1.3，my ardusub fireware is V3.5rc.when I connect my pixhawk ,there has something wrong like this

 ![](https://us1.discourse-cdn.com/flex019/uploads/bluerobotics/original/2X/d/df98a063d3fe57322f5654647a7590a661c619d5.jpg)  
and sensor calibration，i dont find pressure calibration。  
the other version of QGC is master download from github，the version seems OK,but the vedio source is computer itsself rather from raspberry pi。

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**Author:** ![jwalser](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/jwalser/32/2234_2.png) [@jwalser](https://discuss.bluerobotics.com/u/jwalser)\
**Post date:** [May 29, 2017, 3:00pm UTC](https://discuss.bluerobotics.com/t/qgroundcontrol-version/1118/2 "2017-05-29T15:00:40Z")

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Hi, please get an updated version of QGC from here:

[Windows](https://s3.amazonaws.com/downloads.bluerobotics.com/QGC/QGroundControl-installer.exe)  
[Mac](https://s3.amazonaws.com/downloads.bluerobotics.com/QGC/QGroundControl.dmg)  
[Linux](https://s3.amazonaws.com/downloads.bluerobotics.com/QGC/QGroundControl.AppImage)

The video source is configured near the bottom of the _General_ tab in the _Application Settings_ page. Make sure that video source says UDP, and port says 5600.

-Jacob

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**Author:** ![MMMMK](https://avatars.discourse-cdn.com/v4/letter/m/4da419/32.png) [@MMMMK](https://discuss.bluerobotics.com/u/MMMMK)\
**Post date:** [June 1, 2017, 9:08am UTC](https://discuss.bluerobotics.com/t/qgroundcontrol-version/1118/3 "2017-06-01T09:08:03Z")

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OK.The new version seems good ,but the pressure calibration shows calibration failed。my friend tells me that there has still a bug about it, is it true

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**Author:** ![jwalser](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/jwalser/32/2234_2.png) [@jwalser](https://discuss.bluerobotics.com/u/jwalser)\
**Post date:** [June 1, 2017, 2:02pm UTC](https://discuss.bluerobotics.com/t/qgroundcontrol-version/1118/4 "2017-06-01T14:02:09Z")

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Ok, pressure calibration only works on ArduSub 3.5 and recent QGC, which you have. You can confirm your ArduSub version by looking at the _Summary_ tab of the _Vehicle Settings_ page. The ArduSub version should be listed under the _Frame_ section. You can confirm your QGC version by looking at the application window title bar.

Other than that, there are three things that can will cause the vehicle to reply with a failure:

- The vehicle is armed
- The pressure sensor is malfunctioning
- The pressure sensor is currently reading greater than 110,000 Pascal (to prevent zeroing while at depth)

I will test this myself shortly to make sure it is still working.

-Jacob

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**Author:** ![jwalser](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/jwalser/32/2234_2.png) [@jwalser](https://discuss.bluerobotics.com/u/jwalser)\
**Post date:** [June 1, 2017, 4:22pm UTC](https://discuss.bluerobotics.com/t/qgroundcontrol-version/1118/5 "2017-06-01T16:22:08Z")

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I’ve confirmed the pressure calibration is working. Let me know if you are still having issues.