Chrome App usb DigitalPersona fingerprinted reader not found -

Chrome App usb DigitalPersona fingerprinted reader not found -

i'm trying develop google chrome app(or extension, not sure) utilize digitalpersona fingerprint reader on windows.

following : https://developer.chrome.com/apps/usb https://github.com/googlechrome/chrome-app-samples/tree/master/usb

var device_info = { "vendorid": 1466, //0x05ba "productid": 10 //0x000a }; chrome.usb.finddevices(device_info, call_method);

result "app granted 'usbdevices' permission, device not found". p.s. usb info above found in windows device manager.

don't know why happened. google chrome not back upwards digitalpersona fingerprint reader?

p.s. chrome://inspect said "no devices detected."

the content of manifest.json same illustration of knob, vendorid , productid:

{ "name": "usb spinner sample", "version": "0.3", "manifest_version": 2, "minimum_chrome_version": "23", "app": { "background": { "scripts": ["background.js"] } }, "permissions": ["usb"], "optional_permissions": [ {"usbdevices": [{"vendorid": 1466, "productid": 10}]}] }

as noted on usb-label-printer sample chrome app:

some windows device drivers take ownership of device , don't allow chrome connect them. if opendevice or finddevice doesn't work you, can seek utilize generic low level driver instead.

this theory confirmed chiahao, installing generic low-level usb driver zadig tool resolved problem.

usb google-chrome-app