Problem using node-sensortag with noble

[AlexDmr]

I am using both node-sensortag and noble in my code, the problem is that when I require both I get a : Error: Could not initialize libusb. Check that your system has a usb controller.

if I require only one of them it works. Here are the versions I am using :
"noble": "^1.6.0", "sensortag": "^1.2.2",

both installed via npm install --save ...

[sandeepmistry]

@AlexDmr please share the following:

• A minimal code snippet to reproduce
• How you are launching the application. From my understanding libusb is used when some env var's are set
• Full stack trace of error.

[AlexDmr]

Hi, I am using windows 10, with node 4.4.5. The trace error : C:\Recherche\ErrorNoble\node_modules\sensortag\node_modules\noble-device\node_modules\noble\node_modules\bluetooth-hci-socket\node_modules\usb\usb.js:11 throw new Error('Could not initialize libusb. Check that your system has a usb controller.'); ^

Error: Could not initialize libusb. Check that your system has a usb controller. at Object. (C:\Recherche\ErrorNoble\node_modules\sensortag\node_modules\noble-device\node_modules\noble\node_modules\bluetooth-hci-socket\node_modules\usb\usb.js:11:8) at Module._compile (module.js:409:26) at Object.Module._extensions..js (module.js:416:10) at Module.load (module.js:343:32) at Function.Module._load (module.js:300:12) at Module.require (module.js:353:17) at require (internal/module.js:12:17) at Object. (C:\Recherche\ErrorNoble\node_modules\sensortag\node_modules\noble-device\node_modules\noble\node_modules\bluetooth-hci-socket\lib\usb.js:5:11) at Module._compile (module.js:409:26) at Object.Module._extensions..js (module.js:416:10)

----- main.js var noble = require( "noble" ) , sensortag = require( "sensortag" ) ;

noble.on('scanStart', function() {console.log("scanStart");} );

----- NPM : { "name": "errornoble", "version": "1.0.0", "description": "", "main": "index.js", "scripts": { "test": "echo \"Error: no test specified\" && exit 1" }, "author": "", "license": "ISC", "dependencies": { "noble": "^1.6.0", "sensortag": "^1.2.2" } }

[AlexDmr]

Sorry, forgot to mention that I am launching the app with : node main.js

[sandeepmistry]

@AlexDmr thanks, now that you've mentioned you're using Windows this makes more sense :)

This is a downside of using noble on Windows now, each instance of noble needs to open the USB device directly.

What's the output of npm ls? If node-sensortag is not using noble v1.6.0, can you try changing it to do so? (By removing node_modules/sensortag/node_modules/noble and running npm install noble@1.6.0 in node_modules/sensortag/node_modules)

[AlexDmr]

Indeed ! sensorTag installed noble 1.3.0 ! Why ??? Ho actually it is not directly sensorTag but noble-device that install noble 1.3.0 still... why? :)

[sandeepmistry]

This is why: https://github.com/sandeepmistry/noble-device/blob/master/package.json#L34

It can probably be changed from "~1.3.0" to "^1.3.0" ...

[sandeepmistry]

Closing, this change has been made upstream: https://github.com/sandeepmistry/noble-device/commit/22fadf929cbb58c526bffa497014d1956546ac39#diff-b9cfc7f2cdf78a7f4b91a753d10865a2