MIDI input module not loading

Neil Ford

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Feb 20, 2016, 7:05:42 AM2/20/16

to Node-RED

Having got more verbose output on my PI, I now have an error to look at. But being a relative Node-RED noob, I'm not sure what it means.

The error output is:

20 Feb 11:56:27 - [warn] [midi] Error: Could not locate the bindings file. Tried:
→ /home/pi/.node-red/node_modules/node-red-contrib-midi/node_modules/midi/build/midi.node
→ /home/pi/.node-red/node_modules/node-red-contrib-midi/node_modules/midi/build/Debug/midi.node
→ /home/pi/.node-red/node_modules/node-red-contrib-midi/node_modules/midi/build/Release/midi.node
→ /home/pi/.node-red/node_modules/node-red-contrib-midi/node_modules/midi/out/Debug/midi.node
→ /home/pi/.node-red/node_modules/node-red-contrib-midi/node_modules/midi/Debug/midi.node
→ /home/pi/.node-red/node_modules/node-red-contrib-midi/node_modules/midi/out/Release/midi.node
→ /home/pi/.node-red/node_modules/node-red-contrib-midi/node_modules/midi/Release/midi.node
→ /home/pi/.node-red/node_modules/node-red-contrib-midi/node_modules/midi/build/default/midi.node
→ /home/pi/.node-red/node_modules/node-red-contrib-midi/node_modules/midi/compiled/0.10.29/linux/arm/midi.node

I'm guessing it might be a version compatibility problem. The node (http://flows.nodered.org/node/node-red-contrib-midi) was written 7 months ago and may not be up to current spec.

As always, pointers of where I should be looking / reading up on stuff to dig in to this are appreciated.

Neil.

Mark Setrem

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Feb 20, 2016, 7:31:37 AM2/20/16

to Node-RED

Are you running on the version of nodejs that comes installed on the Jessie image?

There is an issue open within the node midi package that is a dependency of the node-red-node, of it not working on that version of nodejs on a Pi
(there should have been errors when you installed the node-red-node)

See https://github.com/justinlatimer/node-midi/issues/89

Neil Ford

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Feb 20, 2016, 10:58:31 AM2/20/16

to Node-RED

Thank you Mark, that has helped a lot. Teach me to not just sudo a module install (old habits die hard).

Neil Ford

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Feb 20, 2016, 11:37:01 AM2/20/16

to Node-RED

And of course it turned out being something stupid...

I was missing the sound library files which the node-midi needed to build. So a quick sudo apt-get install libasound2-dev later, everything installed fine and the node appears in the advanced section. This is on a Pi2 with a fully updated Jessie install.

Thanks everyone for your help debugging stuff today. I'm now off to look at MIDI controllers and the MIDI spec.

Neil.

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