How to attach external fingerprint scanner to flutter attendance application?

I am creating an attendance application using flutter. The owner requires that the attendance should use biometrics. The device may be implemented with android or web. The device provided is Digital Persona U.are.U 4500. I am unable to find any helping material for this. Please help me.

I have tried to read the data from fingerprint reader using usb_serial package and use_device package. The usb_device package shows no output and doesn't even want to connect. The usb_serial connects to the fingerprint scanner, asks for permission to use it and shows its name and productId in attached devices list, but I am not able to get input from reader using this library.

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