Use this if listener callback won't work. uareu.dpfpddOpen(findCorrectDevice);

[sophiaschreur]

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);