# Added Yr.no as a weather provider
Yr.no is a free Norwegian weather service. The configuration is quite
simple:
```js
{
weatherProvider: "yr",
lat: 59.9171,
lon: 10.7276,
altitude: 30
}
```
The latitude and longitude cannot have more than 4 decimals, but that
should be plenty. To quote yr: "There is no need to ask for weather
forecasts with nanometer precision!". The altitude should be meters
above sea level and defaults to 0. If `type` is set to `current` the
symbol can display the next 1, 6 or 12 hours by setting
`currentForecastHours` (default is 1).
It states in [Getting
started-guide](https://developer.yr.no/doc/GettingStarted/) that users
of the API should cache the results and use the `Expires`-header to know
when to ask for new data. By using the `If-Modified-Since`-header we can
avoid downloading the same data over and over again. I chose not to
override the `User-Agent`-header set in
[`server.js`](https://github.com/MichMich/MagicMirror/blob/a328ce5/js/server.js#L97)
even though it does not comply with [the terms of
service](https://developer.yr.no/doc/TermsOfService/). It currently
works with the default header, and by searching the web for MagicMirror
the GitHub-repo should be easy to find without an explicit link.
I also had to make some minor changes to `server.js` and
`weatherprovider.js` to be able to send and return HTTP headers. To
handle the HTTP 304 response without body I chose to return `undefined`
so we easily can use the response as a condition: `if (response) ...`.
The documentation for the API is available here:
- [API Reference overview](https://api.met.no/weatherapi/)
-
[Locationforecast](https://api.met.no/weatherapi/locationforecast/2.0/)
- Used to get the weather forecast
- [Sunrise](https://api.met.no/weatherapi/sunrise/2.0/documentation) -
used to find sunrise and sunset times
Co-authored-by: Veeck <github@veeck.de>
So finally I think this refactorin is ready to be reviewed :-)
DONE:
- [x] Removed all conversion functions for wind and temperature from
specific weatherproviders
- [x] Use internally only metric units: celsius for temperature, meters
per seconds for wind
- [x] Convert temp and wind into the configured units when displaying
data on the UI
- [x] look how beaufort calculation uses metrics, added knots as new
windunit
- [x] add more e2e tests
Checked providers:
- [x] Darksky
- [x] EnvCanada
- [x] OpenWeatherMap
- [x] SMHI provider
- [x] UK Met Office
- [x] UK Met Office DataHub
- [x] WeatherBit
- [x] WeatherFlow
- [x] WeatherGov
TODO in different tickets:
- check weatherproviders for usage of weatherEndpoint (as seen in
https://github.com/MichMich/MagicMirror-Documentation/issues/131) -> see
#2926
- cleanup precipations -> #2953
Co-authored-by: veeck <michael@veeck.de>
small update to the fetchData method to use the fetch helper instead of
the old XCMLHttpRequest.
Also fixes some typos :-)
Co-authored-by: veeck <michael@veeck.de>
This PR addresses [this
comment](48756e8774 (commitcomment-85772193)),
which points out an issue with #2902.
Looks like the apparent temp calculation method was incorrectly
referenced 😅
