DWD WarnApp Sensor (amtliche Warnungen des deutschen Wetterdienstes)

runningman84 · July 26, 2017, 7:58pm

Due to the latest bad weather events I have created a new sensor.

VDRainer · July 26, 2017, 8:27pm

This is great!
Since yesterday i have a generic camera with Weatherwarning Pictures from DWD
Maybe a feature for your app?

- platform: generic
  still_image_url: http://www.dwd.de/DWD/warnungen/warnstatus/SchilderMS.jpg
  name: DWD Warnungen

Links here. Thanks @RubenKelevra

VDRainer · September 9, 2017, 9:16pm

Hi @runningman84, thank you for your hard work, integrating the sensor into HA.
I followed the PR and think it’s not easy.

There’s a little problem with the docs:

sensor:
  - platform: dwdwarnapp

Results in Error on HA start:

Failed config
  General Errors: 
    - Platform not found: sensor.dwdwarnapp

If i use - platform: dwd_weather_warnings like statet in your PR, everything works.

runningman84 · September 9, 2017, 9:39pm

yes the docs were still using the old name, this is a fix for the docs:
https://github.com/home-assistant/home-assistant.github.io/pull/3335

jmtatsch · February 15, 2018, 5:38pm

You wouldn’t have example code to deal with weather alerts above a certain level?

VDRainer · February 16, 2018, 6:16pm

Take a look here:

jmtatsch · February 17, 2018, 4:27am

Thanks a lot

tmeringer · August 8, 2018, 9:16am

Documentation of the DWD sensor (https://www.home-assistant.io/components/sensor.dwd_weather_warnings/) mentions that the warning level ranges from 0 to 4, but mine shows 10:

grafik

How to interpret that?
I haven’t found any warning level details on the DVD homepage.

Thanks.

Flovie · August 8, 2018, 9:33am

Then you should run!

Just kidding. I found one documentation on the DWD page: Wetterwarnungen. However, it also states warning levels ranging from 0 to 4. I don’t know which data basis is used for the DWD component. In the json-file, I also found the level 10.

{“regionName”:“Berlin”,“start”:1533718800000,“end”:1533834000000,“type”:8,“state”:“Berlin”,“level":10,“stateShort”:“BL”,“description”:“Am Mittwoch wird eine extreme Wärmebelastung erwartet.\nAm Donnerstag wird eine starke Wärmebelastung erwartet.\n”,“altitudeStart”:null,“altitudeEnd”:200,“headline”:“Amtliche WARNUNG vor HITZE”,“instruction”:” An beiden Tagen ist mit einer zusätzlichen Belastung aufgrund verringerter nächtlicher Abkühlung insbesondere im dicht bebauten Stadtgebiet von Berlin zu rechnen.Heute ist der 2. Tag der Warnsituation in Folge.\n",“event”:“HITZE”}]

No idea what this means. So I guess, the component works correctly but the interpretation of the data is somehow misleading.

Edit: to be honest, level 10 is even too small for the current heat

VDRainer · August 31, 2018, 7:58pm

DWD Warning stopped working.
Seeing this error the whole day every 15 minutes in my log.

2018-08-31 21:37:24 ERROR (SyncWorker_4) [homeassistant.components.sensor.rest] Error fetching data: <PreparedRequest [GET]> from https://www.dwd.de/DWD/warnungen/warnapp_landkreise/json/warnings.json?jsonp=loadWarnings failed with HTTPSConnectionPool(host=‘www.dwd.de’, port=443): Max retries exceeded with url: /DWD/warnungen/warnapp_landkreise/json/warnings.json?jsonp=loadWarnings (Caused by SSLError(SSLError(1, ‘[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:777)’),))
2018-08-31 21:37:24 ERROR (SyncWorker_4) [homeassistant.components.sensor.dwd_weather_warnings] Unable to fetch data from DWD-Weather-Warnings

Can someone confirm this?

EDIT: Also my generic cameras with pictures from dwd stopped working.
When i open the api url or the images in my browser, they work.
Has HA a problem with it?

dennis84de · September 1, 2018, 7:42am

When I open the api url in a browser, I get the following error:

“SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data”

I think the json result is malformatted.

VDRainer · September 2, 2018, 1:06pm

Github issue:

dasmaeh · September 2, 2018, 7:10pm

Actually the result depends from browser to browser. Firefox is throwing the error you mentioned, Chrome is working fine.

SirBronski · September 3, 2018, 7:57am

Depends which certs are included in the browsers or operating systems CA cert chain.
Chrome includes the intermediate CA certs of https://www.pki.dfn.de/ueberblick-dfn-pki/ which have been used to issue the cert “www.dwd.de”, which enabled Chrome to fully validate the cert, but Mozilla is lacking those CA certs.
I have added the two missing CA certs into my RasPis /etc/ssl/certs, now wget works, but home-assistant still doesn’t.

SirBronski · September 3, 2018, 12:46pm

After adding the missing CA certs to lib/python3.5/site-packages/certifi/cacert.pem the DWD weather warnings are working!

0rn0lf · September 3, 2018, 2:47pm

Is it possible to do this in hassio?

SirBronski · September 3, 2018, 3:30pm

I would think so, if you know how. You have to find out how to ssh to your RasPi (AFAIR port 222, instead of the hass.io-container which listens on default ssh-port 22) and find out where the files are. (in my case: /srv/homeassistant, then see above)

Or wait until the certs are updated in one of the next versions, which would be the correct solution.

diplix · September 4, 2018, 2:11pm

where exactly did you get the two CA certs? here? https://www.pki.dfn.de/wurzelzertifikate/globalroot2/

0rn0lf · September 4, 2018, 2:32pm

I had the exact same thing in my head. Maybe exported the cert from the homepage?

SirBronski · September 4, 2018, 5:05pm

I googled the names of the intermediate certs that I saw in the ‘www.dwd.de’-cert, payed attention that what I’ve found was from DFN-websites, compared the cert-fingerprints and downloaded them:
https://www.pki.dfn.de/fileadmin/PKI/zertifikate/DFN-Verein_Certification_Authority_2.pem
http://cdp.pca.dfn.de/dfn-ca-global-g2/pub/cacert/cacert.pem