Error: Cannot find module 'mqtt'

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4

From inside your custom node path?

Dont do that.

Because you did npm install mqtt -g

You should simply...

  • Setup your custom nodes project folder with necessary files (package.json, your-node.js, your-node.html)
  • For any module that is required by your contrib node, from the base path of your custom node (e.g. C:\my-projects\my-contrib-node) install the requires using npm -i mqtt (or whatever)
  • Ensure your project folder has a .gitignore file and exclude node_modules etc

Once project is ready to test, in your node-red folder (e.g. cd c:\users\JSHR\.node-red), install your node...

  • npm install C:/my-projects/my-contrib-node

Restart node-red after every change to your source.

From that point on, C:/my-projects\my-contrib-node will be sym-linked to c:\users\JSHR\.node-red\node_modules\my-contrib-node. That means any files you change/delete in c:\users\JSHR\.node-red\node_modules\my-contrib-node will be changed/deleted from C:/my-projects\my-contrib-node

alternatively, if you want step debug in vscode - follow this

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