Well on first look it looks like the overrides in weewx.conf are not being 
picked up, looking closer at the stacked windrose generator code I can see 
that the overrides are being picked up but the generator never does any 
conversion of the raw wind speed data from the database. In terms of 
effects, this means the windrose would always use the speed units that are 
used in the weewx database (for most this is mph). Not sure how I missed 
this, that generator was written over 2 years ago and I distinctly remember 
testing the units - perhaps it coincided with changing database units on my 
then test system - I do remember doing that a few times. No matter. 

To fix the issue just move aside your current 
bin/user/imageStackedWindRose3.py then download the latest version of the 
file from bitbucket. Easiest approach to downloading is probably using wget 
- this command should do it:

$ wget -P /var/tmp https:
//bitbucket.org/ozgreg/weewx-wd/raw/bc5c32cd97e5ec7f81ea8f83eb0edb2f241eaa3f/bin/user/imageStackedWindRose3.py

Note this file has the import Image/ImageDraw fix from a few days ago so 
that issue should not give you any more grief. Thanks for pointing out the 
issues.

Gary


On Wednesday, 14 December 2016 03:11:47 UTC+10, Louis De Lange wrote:
>
>
>
> On Sunday, 11 December 2016 18:52:27 UTC-8, gjr80 wrote:
>>
>> Thanks, I thought that one had come up before and had been fixed, 
>> apparently not. I have commited a fix to the weewx-WD bitbucket repo and 
>> will release a 1.0.2 version this week sometime. Oh, and by the way the fix 
>> is the same as is used by weewx in bin/weeplot/genplot.py:
>>
>> try:
>>     from PIL import Image, ImageDraw
>> except ImportError:
>>     import Image, ImageDraw
>>
>> Gary
>>
>>
> Gary,
>
> Next problem - according to the log the wdStackedWindRose report runs 
> without any error.
>
> Dec 13 08:51:46 goflexhome weewx[25754]: reportengine: Running report 
> wdStackedWindRose
> Dec 13 08:51:46 goflexhome weewx[25754]: reportengine: Found configuration 
> file /home/weewx/skins/StackedWindRose/skin.conf for report wdStackedWindRose
> Dec 13 08:51:46 goflexhome weewx[25754]: imageStackedWindRose: Generated 1 
> images for wdStackedWindRose in 0.25 seconds
>
>
> The image daywindrose.png is created, but it shows all winds to be zero - 
> also, it shows the units to be mph rather than kmph as configured.  
>
>
> See the generated image and the regular weewx wind vector image attached for 
> comparison.
>
>
> The clip from my weewx.conf file below show the unit overrides to kmph.
>
>
>     [[wdStackedWindRose]]
>
>         HTML_ROOT = public_html/WD
>
>         skin = StackedWindRose
>
>         [[[Units]]]
>
>             [[[[TimeFormats]]]]
>
>                 date_time_f = %d/%m/%Y %H:%M
>
>                 date_f = %d/%m/%Y
>
>             [[[[Groups]]]]
>
>                 group_speed = km_per_hour
>
>     [[wdStackedWindRose]]
>         HTML_ROOT = public_html/WD
>         skin = StackedWindRose
>         [[[Units]]]
>             [[[[TimeFormats]]]]
>                 date_time_f = %d/%m/%Y %H:%M
>                 date_f = %d/%m/%Y
>             [[[[Groups]]]]
>                 group_speed = km_per_hour
>
>                 group_speed2 = km_per_hour2 
>
>
>
>

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