Xprinter "No Device Found"

[azamalvi]

Hello,
I am using this library with my Ionic 4 app. I am providing the VID and PID fetching from lsusb command.

Bus 002 Device 024: ID 0483:5743 STMicroelectronics USB Printer P

Also I tried all drivers mentioned in doc. My printer is Xprinter. Now issue is that I'm unable to connect with. It throws No Device Found error. But when I give same VID in this website https://devanlai.github.io/webdfu/dfu-util/ it connect to my printer.
Now I am stuck. I tried with Bluetooth Serial plugin but that does not print accurately.
Please tell me what should I do now.