Same issue for me. The Manage your API key page displays a Error getting data from server :-( error. I can see the underlying calls to https://api4.windy.com/api4/keys are returning 403 responses.

have you looked at the documentation samples:
https://api4.windy.com/examples/hello-world/

once you have a reference to map, you can use it as documented in leaflet documentation.

store.set('isolines', 'pressure');

hi @ivo - any thoughts about this? forcing a refresh of the model data and the view without having to reload the whole page? this appear to be an issue in https://www.windy.com/ as well - no auto update.

I have not looked myself, but have you gone digging through the code for the isoline plugin:
https://api4.windy.com/assets/v/16.1.0-cc030470/plugins/isolines.js

You might find there are parameters you might manage to configure; or you might be able to make your own custom variant to use in place of this ootb plugin.

Hi @ivo - any news on this? forcing desktop mode only?

What is the URL for this page you have created?

Have you strted by simply copying/pastign the "hello world" example (https://api4.windy.com/examples/hello-world/)?

The Windy API is not really made for that use case. It's really built as a visualization layer that you can customize. Not a standalone headless REST API.

@saaneuvos said in Guide for dummies: How to load API 4?:

testAPI4.php

ah, so the address is https://www.sääneuvos.fi/test/testAPI4.php.

when i try load that page, i see the js console is reporting the following error:
Windy API used on unauthorized domain

Have you authorized your domain (www.sääneuvos.fi) in your API config (https://api4.windy.com/api-key/)? If you have, ivo's code might be having issues with the special characters in your domain name (ä)...

see:
https://community.windy.com/topic/6514/weather-picker-not-working-in-mobile-browsers/6