Using npm module


I'm new to Node Red and I would like to use the astronomy-engine npm module (astronomy-engine - npm) in node npm but I can't find any examples to help me.

Is it possible to have some help to extract the functions?

Welcome to the forums @Greg50100,

It may be worth searching for a Node that has already wrapped this in a Node RED Node, search here :

If not, it may still be possible, but its going to require some setup.

  1. Ensure your installation allows to use 3rd party modules in Function nodes.
    You do this by enabling a setting in settings.js line 455.

    functionExternalModules: true,
    Screenshot 2023-10-12 at 17.55.43
    settings.js is usually in your Node Red user directory (example /home/pi/.node-red/settings.js)

  1. Restart Node RED

  2. In a function node declare its use under setup
    Screenshot 2023-10-12 at 17.59.46

  3. Then the various code blocks in the function node will now be able to use its exports

Thank you very much for your help.

here is an example

[{"id":"3ace5553b59447a8","type":"function","z":"80fb9cd6399ef672","name":"astronomicalDawn","func":"var latitude = 49.62734;\nvar longitude = -1.61789;\nvar elevation = 3;\nvar now = new Date();\nlet observer = new astronomyEngine.Observer(latitude, longitude, elevation);\n\nmsg.payload = astronomyEngine.SearchAltitude('Sun', observer, +1, now, 300, -18);;\n\nreturn msg;","outputs":1,"timeout":0,"noerr":0,"initialize":"","finalize":"","libs":[{"var":"astronomyEngine","module":"astronomy-engine"}],"x":450,"y":240,"wires":[["cb3b2157426f97eb"]]},{"id":"cb3b2157426f97eb","type":"debug","z":"80fb9cd6399ef672","name":"debug 17","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":660,"y":240,"wires":[]},{"id":"bd15675083ddb944","type":"inject","z":"80fb9cd6399ef672","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":true,"onceDelay":"3","topic":"","payload":"","payloadType":"date","x":210,"y":240,"wires":[["3ace5553b59447a8"]]}]
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