Bad graphs

[Meteo Ballino]

Hello everyone

I have installed weewx for a few days now, it works very well. The problem is that I can't see the graphs correctly.

I also installed a new skin (neowx) but the problem persists. The graphs are cropped and full of strange lines. If I save the graph as a image, it appears complete but "buggy".

What can it be?

This is my website: http://www.garda-meteo.com/matteo/dati/varignano/

Thanks.

Luca 

[Meteo Ballino]

[Tom Keffer]

Hello, Luca

I think this is a question best directed at the author of the skin. Something probably got set wrong in skin.conf.

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[Meteo Ballino]

Actually I had this problem even with the "default" skinf of weewx. I try to post the skin.conf file

[Tom Keffer]

I suspect the problem involves the anti-aliasing. You have it set very high

    anti_alias = 4

Just to make sure this is the problem, set it to 1 and see what happens.

-tk

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[Meteo Ballino]

I tried. Unfortunately nothing changes.

Could it be that the hardware is limited and can't handle plotting?

weewx is running on a sheevaplug with debian10

[Tom Keffer]

A SheevaPlug is certainly a very low-powered device. A look at the log might answer your question. But, I doubt low-memory would be causing this.

Sorry, but I can't really debug neowx, but you say it is happening with the Standard skin, so let's focus on that. Deactivate the neowx skin, activate the Standard skin. Restart weewx. Post the log from startup through the first reporting cycle. 

-tk

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[vince]

On Thursday, December 17, 2020 at 6:43:21 AM UTC-8 meteo....@gmail.com wrote:

Could it be that the hardware is limited and can't handle plotting?

weewx is running on a sheevaplug with debian10

I run weewx in debian 8 on a Seagate Dockstar which is a Sheevaplug with only 128 MB RAM.  Everything runs just fine on that tiny system, although it periodically swaps a bit.   I run many extensions and skins including forecast and Belchertown without issues there, other than it being slow to process the skins.

[Meteo Ballino]

Hello and thanks for your answers.

I set the standard skin and these are the results

The graphs are generated but they are all buggy

[Tom Keffer]

Very odd. I have not seen this before. This is with anti_alias = 1, correct?

I'm suspecting something is wrong with your installation of the Python Imaging Library (PIL). What version do you have? I can't tell which version of Python you are running because you did not post the log from the restart of WeeWX.

But, this should work:

cat /etc/default/weewx

source /etc/default/weewx

$WEEWX_PYTHON -c "import PIL; print(PIL.__version__)"

-tk

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[Meteo Ballino]

Yes, the anti_alias is set to 1. I also think that the problem is the PIL.

Python version 3

PIL version is the 5.4.1

[Tom Keffer]

Can you upgrade PIL?

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[Meteo Ballino]

how can I do?

thanks

[Tom Keffer]

Not sure, but you can try pip:

sudo python3 -m pip install Pillow

Then, again,

python3 -c "import PIL; print(PIL.__version__)"

to see if it's any different.

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[Meteo Ballino]

I can't get the PIL version, but I've updatet Pillow.

Now I obtain this result.

[Tom Keffer]

You do not want the PIL version. It is very out of date. You want Pillow. What exactly did you try? If you tried to install PIL, then tried to install Pillow, it's possible you left parts of PIL behind, and now have a mixture.

What do you get for this:

python3 -c "from PIL import ImageDraw; print(dir(ImageDraw))"

python3 -c "import PIL; print(PIL.__version__)"

python3 -m pip list

-tk

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[Tom Keffer]

Meteo Ballino?