Via the service of OpenWeatherMap.org You can get free weather data. To be able to access this service in an automated way – for example from NodeRed or from an Arduino – you need an API key.
This article will describe how to register this.
Hints for our lovely english readers: Basically, many of the articles on Nerdiy.de are translations from the original german articles. Therefore, it may happen here and there that some illustrations are not available in english and that some translations are weird/strange/full of mistakes or generally totaly wrong. So if you find some obvious (or also not obvious) mistakes don't hesitate to leave us a hint about that in the comment section.
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Register user login for OpenWeatherMap.org
To register an API key, you must first set up a user login. Go to the site OpenWeatherMap.org.


Register API key
Once you've created your user account for OpenWeatherMap, it's time to create an API key. An API key is a long string of characters that gives you access to the services offered by OpenWeatherMap, much like a username and password.




You can now use this API key in your Arduino or RaspberryPi project to retrieve current weather data.
Have fun with the project
I hope everything worked as described. If not or you have any other questions or suggestions, please let me know in the comments. Also, ideas for new projects are always welcome. 🙂
P.S. Many of these projects - especially the hardware projects - cost a lot of time and money. Of course I do this because I enjoy it, but if you appreciate that I share this information with you, I would be happy about a small donation to the coffee box. 🙂