Our code sometimes would first find a device called this: broadcom corporation, control vault with fingerprint sensor. And other times find the digital persona device first.

And since the example code in the readme always used the first device, our code was periodically not working and we were so stumped why.

Finally figured it out that it was finding the wrong device.

Our fix looked like this:
const findCorrectDevice = res.devicesList.find((d: any) => d.dpfpddHwDescr.vendorName === 'DigitalPersona, Inc.')
return uareu.dpfpddOpen(findCorrectDevice);

Hi bro, when i try to run example code, with dll into bin folder, get tittle error.

It happens when call uareu.dpfpddQueryDevices()

My sensor is working correctly with DigitalPersona workstation.

Environment

• Sensor: DigitalPersona 4000b
• SO: Windows 10;
• Architecture: x64;
• NodeJS: 12.13.0;

Stack trace:
Error: One or more parameters passed to the API call are invalid. at new ErrorHandler (C:\Users\Administrador\Desktop\project\node_modules\uareu-node\dist\modules\handlers\error\error.handler.js:13:23) at C:\Users\Administrador\Desktop\project\node_modules\uareu-node\dist\modules\index.js:179:24 at new Promise (<anonymous>) at UareU.dpfpddQueryDevices (C:\Users\Administrador\Desktop\project\node_modules\uareu-node\dist\modules\index.js:129:56) at C:\Users\Administrador\Desktop\project\main.js:20:26 at processTicksAndRejections (internal/process/task_queues.js:95:5) at async init (C:\Users\Administrador\Desktop\project\main.js:13:12)

Hi @lucasfelipecdm
We implement the uareu-node NPM is working fine in development mode but when i am going to create electron build it gives the empty device list.
my machine is ubuntu 18.4
output is :
{
callbackRet: 0,
readableRet: 'Information about connected readers obtained.',
devicesNumber: 0,
devicesList: []
}

I don't understand what to do.
Please help me

I'm sorry for opening another issue with similar title with already open issue, but since the last one was quite old without any response, I figured it's better to open new one.

Environment:
OS: Windows 10
NodeJS: v18.10.0
TypeScript

the error is more or less the same as previous issue:

Error: Unknown code error.
    at new ErrorHandler (<omitted>\node_modules\uareu-node\dist\modules\handlers\error\error.handler.js:17:23)
    at <omitted>\node_modules\uareu-node\dist\modules\index.js:113:24
    at new Promise (<anonymous>)
    at UareU.dpfpddInit (<omitted>\node_modules\uareu-node\dist\modules\index.js:103:48)
    at <omitted>\test\app.js:455:17

At first, I used the code example you provided on readme, and decided to edit it a little to figure out where the code stopped working:

const { UareU, CONSTANTS } = require('uareu-node'); // Import
const uareu = UareU.getInstance(); // Get a unique instance of library handler.
let reader; // Create a variable to keep the reader handle after 'open' the device.
// Probably the code below will also work for you.
uareu.loadLibs() // Load libs
    .then(() => { console.log("Uareu lib loaded"); uareu.dpfpddInit(); }) // Init libs
    .then(() => { console.log("Uareu lib initialized"); uareu.dpfpddQueryDevices() }) // Search reader devices connected
    .then((res) => { console.log("Uareu device scanned", res); uareu.dpfpddOpen(res.devicesList[0]) }) // 'Open' the reader device, it's needed for use others functions like: dpfpddCaptureAsync
    .then((res) => { console.log("Uareu device opened"); if (res) reader = res; console.log("Uareu initialized") }) // Set reader variable
    .catch((err) => { throw err; });

With this code, it managed to run until the third callback:

Uareu lib loaded
Uareu lib initialized
Uareu device scanned undefined
Error: Unknown code error.

Notice that variable res is undefined, and the same error was thrown after that line on console.
Next I tried to check what's res type, so I changed the import line to this:

import { UareU, CONSTANTS } from "uareu-node";

And then from TypeScript compiler:

Property 'devicesList' does not exist on type 'void'.

I figured that you need to return the function in the previous callback to make it wait and receive the res variable, so the code changes to this:

uareu.loadLibs() // Load libs
    .then(() => { console.log("Uareu lib loaded"); return uareu.dpfpddInit(); }) // Init libs
    .then(() => { console.log("Uareu lib initialized"); return uareu.dpfpddQueryDevices() }) // Search reader devices connected
    .then((res) => { console.log("Uareu device scanned", res); return uareu.dpfpddOpen(res.devicesList[0]) }) // 'Open' the reader device, it's needed for use others functions like: dpfpddCaptureAsync
    .then((res) => { console.log("Uareu device opened"); if (res) reader = res; console.log("Uareu initialized") }) // Set reader variable
    .catch((err) => { throw err; });

And so the compiler accepted this code and run it after compiling it, but the result was quite different:

Uareu lib loaded
Error: Unknown code error.

It only manages to run on first callback, the next one failed, meaning the error originated from calling uareu.dpfpddInit();.

Hi @lucasfelipecdm ,
we are using this library for handling the bio-matrics device for last 1.5 year and it's working fine for us
but now to are thinking to upgrade the code base to node 14 . and we are done with that the issue is come into the picture uareu-node library is not working on node 14

Please help us to resove the issue

Error: Unknown code error.
at new ErrorHandler (c:\Users\user\Downloads\uareu-node-master\dist\modules\handlers\error\error.handler.js:16:23)
at c:\Users\user\Downloads\uareu-node-master\dist\modules\index.js:113:24
at new Promise ()
at UareU.dpfpddInit (c:\Users\user\Downloads\uareu-node-master\dist\modules\index.js:103:48)
at c:\Users\user\Downloads\uareu-node-master\example\index.js:14:27
at processTicksAndRejections (internal/process/task_queues.js:93:5)
at async init (c:\Users\user\Downloads\uareu-node-master\example\index.js:13:12)

when trying to run in electron its crash with no error (npm run start = electron .), but when I am using the node command "node main.js" its works.

any ideas what crash in electron?

Thanks

Hi,

I was looking at using this library for a project I am working on but one of the issues Im having is taking fingerprint data I get from the digitalpersona javascript SDK and importing it and having it read by this library.

Are there any examples of how to do this?

Hello, I am having the problem that you see in the image (https://ibb.co/Stg08xN) when executing the code.

This is my code: https://github.com/juanchehin/node-u4500

Load the "libs" in "../bin" , the libs are these https://www.hidglobal.mx/drivers/39477

Enviroments:

-Win10 64bit
-Node 16.14

Hi @lucasfelipecdm
i am trying to integrate the biometric Digital Persona 4500 Fingerprint Reader in node js
when I use uareu-node package to integrate then I have an error

Error: ENOENT: no such file or directory, open 'bin/dpfpdd.so'

I am using the Linux os

please help on this