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.
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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. 🙂