HowTo: Node Red – Get current weather data from OpenWeatherMap

It is not always possible to directly measure environmental data such as the outside temperature. Still, sometimes it comes in handy. For example, you can ensure that the radiators inside are only switched on when it is cold outside. Heaters that switch on automatically in summer not only cost money but also sweat. 🙂

In order to get this environmental data, you would actually need your own weather station, which feeds the SmartHome with the corresponding data.
However, you can save this money. Thanks to free weather services from which you only have to obtain this data. One of these weather services is OpenWeatherMap.org.

How you can obtain weather data from OpenWeatherMap.org and use it for your SmartHome is explained in the following article.

Safety instructions

I know the following notes are always kind of annoying and seem unnecessary. Unfortunately, many people who knew "better" have lost eyes, fingers or other things due to carelessness or injured themselves. Data loss is almost negligible in comparison, but even these can be really annoying. Therefore, please take five minutes to read the safety instructions. Because even the coolest project is not worth injury or other trouble.
https://www.nerdiy.de/sicherheitshinweise/

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Requirements

Helpful articles:
To be able to use this configuration, NodeRed should of course already be installed.
How to prepare a RaspberryPi and then install NodeRed on it is described in the following articles.

The following articles describe what has to be done to prepare the RaspberryPi so far:
RaspberryPi – setup for nerdiys!
RaspberryPi – The first configuration!
RaspberryPi – Control the RaspberryPi via SSH
NodeRed – Installing NodeRed on the RaspberryPi
NodeRed – Install new nodes
NodeRed - import and export node code

Required tool:
-no-

Required material:

In the following list you will find all the parts you need to implement this article.

Log into the NodeRed configuration interface

Before you can edit your NodeRed configuration, you must - if activated - first log into the NodeRed configuration interface.

Register openWeatherMap API key

Node code:

[{"id":"85dcceee.5ca84","type":"change","z":"5ebf035f.49459c","name":"outside temperature","rules":[{"t":"set ","p":"payload","pt":"msg","to":"data.main.temp-273.15","tot":"jsonata"}],"action":""," property":"","from":"","to":"","reg":false,"x":710,"y":200,"wires":[["6ab6bc17.16a144"] ]},{"id":"b36beeac.014ba","type":"json","z":"5ebf035f.49459c","name":"","property":"payload","action" :"","pretty":false,"x":510,"y":200,"wires":[["85dcceee.5ca84","a0fb594.6e02ea8","7aa148d5.934fb8","8e550228.aae02 ","52536e82.1cb05","b22dec0e.d53f3","bcdf0d32.be17a","95d0a7a8.66b9e8","514584f.458327c"]]},{"id":"34eee9ed.b64d36","type": "inject","z":"5ebf035f.49459c","name":"Retrieve data manually","topic":"","payload":"","payloadType":"date","repeat": "","crontab":"","once":false,"onceDelay":0.1,"x":180,"y":260,"wires":[["d5a8c5aa.82b3c8"]]},{ "id":"a0fb594.6e02ea8","type":"change","z":"5ebf035f.49459c","name":"outsidehumidity","rules":[{"t":"set", "p":"payload","pt":"msg","to":"data.main.humidity","tot":"jsona ta"}],"action":"","property":"","from":"","to":"","reg":false,"x":720,"y":320 ,"wires":[["b9f93625.5051b8"]]},{"id":"7aa148d5.934fb8","type":"change","z":"5ebf035f.49459c","name":" external air pressure","rules":[{"t":"set","p":"payload","pt":"msg","to":"data.main.pressure","tot":" jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":700,"y":360 ,"wires":[["fbf0a415.6ed9c8"]]},{"id":"d5a8c5aa.82b3c8","type":"openweathermap","z":"5ebf035f.49459c","name":" ","wtype":"current","lon":"","lat":"","city":"Bochum","country":"Germany","language":"de","x ":410,"y":260,"wires":[["b36beeac.014ba"]]},{"id":"67bf25e3.d1ce1c","type":"openweathermap in","z":" 5ebf035f.49459c","name":"","wtype":"current","lon":"","lat":"","city":"Bochum","country":"Germany", "language":"de","x":160,"y":200,"wires":[["b36beeac.014ba"]]},{"id":"8e550228.aae02","type": "debug","z":"5ebf035f.49459c","name":"Raw data","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete": "true","x":680,"y":160,"wires ":[]},{"id":"6ab6bc17.16a144","type":"debug","z":"5ebf035f.49459c","name":"outsidetemperature","active":true," tosidebar":true,"console":false,"tostatus":false,"complete":"payload","x":990,"y":200,"wires":[]},{"id": "b9f93625.5051b8","type":"debug","z":"5ebf035f.49459c","name":"outside humidity","active":true,"tosidebar":true,"console":false, "tostatus":false,"complete":"payload","x":1000,"y":320,"wires":[]},{"id":"fbf0a415.6ed9c8","type":" debug","z":"5ebf035f.49459c","name":"Outside air pressure","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":" payload","x":980,"y":360,"wires":[]},{"id":"52536e82.1cb05","type":"change","z":"5ebf035f.49459c ","name":"Wind speed","rules":[{"t":"set","p":"payload","pt":"msg","to":"data.wind.speed ","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x": 690,"y":400,"wires":[["93256619.92a1b8"]]},{"id":"b22dec0e.d53f3","type":"change","z":"5ebf035f.49459c" ,"name":"Wind direction","rules":[{"t":"set","p":"payload","pt" :"msg","to":"data.wind.deg","tot":"jsonata"}],"action":"","property":"","from":"","to ":"","reg":false,"x":690,"y":440,"wires":[["d755f34d.fdefa"]]},{"id":"93256619.92a1b8","type ":"debug","z":"5ebf035f.49459c","name":"Wind force","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete ":"payload","x":970,"y":400,"wires":[]},{"id":"d755f34d.fdefa","type":"debug","z":" 5ebf035f.49459c","name":"Wind direction","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","x":970 ,"y":440,"wires":[]},{"id":"bcdf0d32.be17a","type":"change","z":"5ebf035f.49459c","name":"wetterDescription ","rules":[{"t":"set","p":"payload","pt":"msg","to":"data.weather[0].description","tot" :"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":720,"y" :480,"wires":[["a9876b9d.5e5be8"]]},{"id":"a9876b9d.5e5be8","type":"debug","z":"5ebf035f.49459c","name" :"weatherDescription","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload" ,"x":1000,"y":480,"wires":[]},{"id":"95d0a7a8.66b9e8","type":"change","z":"5ebf035f.49459c", "name":"outsideTempMin","rules":[{"t":"set","p":"payload","pt":"msg","to":"data.main.temp_min-273.15 ","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x": 700,"y":240,"wires":[["751ba810.fd1938"]]},{"id":"514584f.458327c","type":"change","z":"5ebf035f.49459c ","name":"outsideTempMax","rules":[{"t":"set","p":"payload","pt":"msg","to":"data.main.temp_max -273.15","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x ":700,"y":280,"wires":[["455148a8.ce5168"]]},{"id":"751ba810.fd1938","type":"debug","z":"5ebf035f .49459c","name":"outsideTempMin","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","x":980, "y":240,"wires":[]},{"id":"455148a8.ce5168","type":"debug","z":"5ebf035f.49459c","name":"outsideTempMax" ,"active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","x":980,"y":280,"wires":[ ]}]

Further information

https://openweathermap.org/

Have fun with the project

I hope everything worked as described for you. If not or you have questions or suggestions please let me know in the comments. I will then add this to the article if necessary.
Ideas for new projects are always welcome. 🙂

PS 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 think it's cool that I share the information with you, I would be happy about a small donation to the coffee fund. 🙂