Ionic-native/serial

i’m trying to use Ionic Native - Serial
already install it, and add it to app.module and my page module + page.ts

but when i build it, and try to connect it to digital scale it shows “device not found” anyone know about this?

Ionic:

Ionic CLI : 6.2.0 (C:\Users\Dapidodev\AppData\Roaming\npm\node_modules@ionic\cli)
Ionic Framework : @ionic/angular 4.11.10
@angular-devkit/build-angular : 0.801.2
@angular-devkit/schematics : 8.1.3
@angular/cli : 8.1.2
@ionic/angular-toolkit : 2.1.2

Capacitor:

Capacitor CLI : 1.4.0
@capacitor/core : 1.4.0

Cordova:

Cordova CLI : 9.0.0 (cordova-lib@9.0.1)
Cordova Platforms : android 8.1.0
Cordova Plugins : cordova-plugin-ionic-keyboard 2.2.0, cordova-plugin-ionic-webview 4.1.3, (and 9 other plugins)

Utility:

cordova-res : not installed
native-run : 0.3.0

System:

NodeJS : v16.16.0 (C:\Program Files\nodejs\node.exe)
npm : 8.11.0
OS : Windows 10