Issue with setup of USB device

[IsomanGJ]

Just trying to setup on my PC. Have one ant stick plugged in which I know is working. Tried running a couple of demos but they fail on “new AntTransceiver(0);” part of line with

Exception in thread “main” java.lang.NullPointerException
at javax.usb.UsbHostManager.getServicesName(UsbHostManager.java:96)
at javax.usb.UsbHostManager.initialize(UsbHostManager.java:32)
at javax.usb.UsbHostManager.getUsbServices(UsbHostManager.java:24)
at org.cowboycoders.ant.interfaces.AntTransceiver.doInit(AntTransceiver.java:141)
at org.cowboycoders.ant.interfaces.AntTransceiver.(AntTransceiver.java:125)
at org.cowboycoders.ant.interfaces.AntTransceiver.(AntTransceiver.java:114)
at virtualride.AcknowledgedDemo.main(AcknowledgedDemo.java:196)

Any Ideas? Thanks

Logged above on website and you asked me to put it here.

You replied:
What operating system are you using? Does the
the vendorId, deviceId pair of your usb stick correspond to 0fcf and 1008 respectively

Answer:Windows 10
If I look at the device details device manager I see this: USB\VID_0FCF&PID_1009

which I suspect means it's 1009.

On the back of that tried
new AntTransceiver(1)
and
new AntTransceiver(1009)

but got same effect. Sorry - not exactly sure what value I'm supposed to be passing and can't find a document to tell me.

Thanks in advance

[jovial]

The zero in new AntTransceiver(0) refers to how many devices to skip whilst walking through all of the enumerated devices; zero would just return the first one found. This is useful if you have multiple matching devices on the same machine. The list of devices that produce a match comes from AntDeviceId.

However, it doesn't look like it gets far enough to actually search for these devices. It looks like this is most likely a problem with javaxusb. You might want to try a later version and report back if the behaviour changes.

[IsomanGJ]

HIi Jovial, thanks for that. Downloaded a newer version (didn't realise I had an older version) and that seemed to work. Got errors further on but it got me over that one at least. Thanks

[IsomanGJ]

Like I said it gets a bit further but now falls over on the following:
USB error 3: Unable to claim interface: Access denied (insufficient permissions)

when I run: node.start();

Operating system is windows 10. Thanks again in advance

[jovial]

I believe you have to follow this guide:

https://github.com/libusb/libusb/wiki/Windows#How_to_use_libusb_on_Windows

[IsomanGJ]

It does look to me like i have the latest driver and I know that the device does work as I use it through Zwift. Anything else you can think of? Thanks in advance

[IsomanGJ]

Hi Jovial, Actually it did seem to work if I switched USB driver to libusdk from libusb. So I think it's working now. Thanks for your help