tag formatting with Davis airlink data

[Jacques Terrettaz]

Hello,

I have recently installed a Davis Airlink sensor, and configured the following weewx plugin : https://github.com/chaunceygardiner/weewx-airlink

I have added to my sqlite database the fields "pm1_0", pm2_5" and "pm10_0".

Almost everything seems OK : sqlite database receiveing the date, image generator  working ( http://meteo-sciez.fr/weewx/airlink/), but I still have some problems with template tags :

WIth the following test  tmpl file :

pm1-act-label-false|$current.pm1_0.format(add_label=False)

pm1-act|$current.pm1_0

pm1-act-raw|$current.pm1_0.raw

outTemp-act-label-false|$current.outTemp.format(add_label=False)

outTemp-act|$current.outTemp.format

outTemp-act-raw|$current.outTemp.raw

the output is :

pm1-act-label-false|= 1.1

pm1-act|= 1.1 µg/m³

pm1-act-raw|1.0662251655629138

outTemp-act-label-false|10.7

outTemp-act|10.7 °C

outTemp-act-raw|10.72222222222222

 

(see http://meteo-sciez.fr/weewx/tagssciez/testpm.txt 

Only for pm1_0, pm2_5 and pm10_0, there is a " =" at the beginning for tags such as "$current.pmX_X" or "$current.pmX_X.format(add_label=False)"

This " =" is visible also for a skin such as weewx-wdc :

[jterr...@gmail.com]

the end of my email was somehow not visible...

 (see http://meteo-sciez.fr/site/mesures.php)

Do you have any idea why a " =" is added in front of tags for pmx_x values?

[Tom Keffer]

Not sure if this is the problem, but try using "false" instead of "False".

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[jterr...@gmail.com]

Thanks for your reply Tom.

The problem does not seems here to be due to "false" or "False"  since a tag such as "$current.pm1_0"  is computed as " = 1.1 µg/m³"  with the " ="  before the value of the tag.

[vince]

Why not simply format the .raw value to the required number of decimal places ?

I do this with my purpleair data from a secondary db, if it helps any....

             <tr>
                <td class="stats_label">pm2_5_cf_1</td>
                <td class="stats_data">$latest('purpleair_binding').pm2_5_cf_1.formatted $unit.label.pm2_5_cf_1</td>
              </tr>

[Jacques Terrettaz]

Thanks  Vince,

Workarounds are possible, but  I would be happy to  understand, if possible,  why weewx is adding  a " ="  ( which is not expected) to tags for  parameters  with group unit  "group_concentration "

 

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[vince]

FWIW - I have occasionally found $current has unexpected behavior when $latest sometimes works better.

[Jacques Terrettaz]

Just tested .... With my settings, and without a secondary  db,  the tag  $latest.pm2_5.formatted  produce   = 2.8    with the " =" !

Le 28 févr. 2025 à 20:56, vince <vince...@gmail.com> a écrit :

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[gjr80]

Your problem is in weewx.conf  [StdReport] [[Defaults]] [[[StringFormats]]]. You have a = in the group_concentration format:

microgram_per_meter_cubed = = %.1f

Gary

[gjr80]

Correction the ‘ microgram_per_meter_cubed’ format.

Gary

[Jacques Terrettaz]

Thanks Gary. It was the problem.

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