Error: Cannot find module '../build/Release/WiringPi about mfrc522-rpi

[firsttris]

Hey nelson,

i now from webpack how this works. but no xp with browserfy.

On Webpack you need to define modules which contains "native node modules" as external dependency.

e.g.
externals: {
"wiringpi-node": "require('wiringpi-node')"
}

Native node modules are written in C or C++ ...
means you can't bundle it, you have to copy the dependency to your build target.

regards
Tristan

[nelson2930]

Thankyou...
As you said, i bundled the file using webpack.
But the output file contains a require statement for wiringpi-node as below.

(function(module, exports) {
module.exports = require("wiringpi-node");
})

My aim is to make MFRC based login system from the client side and for that, I want to read cards from client side browser using the above bundled js file

Since the bundled file contains a require statement for the wiring-pi node, browser shows the following error in console

Uncaught Error: Module name "wiringpi-node" has not been loaded yet for context: _. Use require([])

Is there any option to include wiring-pi node to java-script running on the browser.

Thanks for your help

[firsttris]

In the browser its not possible but in an electron app.

clone https://github.com/electron/electron-quick-start

• change webpack "target" to electron-renderer
• in package.json of electron-quick-start point "main" to your bundle.
• external module (wiring-pi) needs to be installed/copied in electron-quick-start.

[PierreTrp]

I have the same issue but i'm not trying to bundle anything, just doing node test/read.js and it throw me this error :

Error: Cannot find module '../build/Release/WiringPi'
    at Function.Module._resolveFilename (module.js:543:15)
    at Function.Module._load (module.js:470:25)
    at Module.require (module.js:593:17)
    at require (internal/module.js:11:18)
    at Object.<anonymous> (/home/pi/project/node_modules/wiringpi-node/lib/exports.js:1:80)
    at Module._compile (module.js:649:30)
    at Object.Module._extensions..js (module.js:660:10)
    at Module.load (module.js:561:32)
    at tryModuleLoad (module.js:501:12)
    at Function.Module._load (module.js:493:3)

Node v9.10.1
Linux raspberrypi 4.1.18-v7+

EDIT : using node v8.9.4 solved my wiringpi installation problem, i then used wiringpi-node instead of wiring-pi (because of a hardware error) and everything worked fine

[firsttris]

@PierreTrp have you installed deps ? npm install

[jhoughjr]

I'm seeing this same thing, not bundling anything and have done nom install wiring-pi.