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improve USB device detection logic

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Gilles Boccon-Gibod
2022-10-04 09:59:48 -07:00
parent a2f18cffc9
commit d2227f017f
5 changed files with 157 additions and 29 deletions
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9
docs/mkdocs/src/transports/usb.md
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@@ -5,6 +5,7 @@ The USB transport interfaces with a local Bluetooth USB dongle.
## Moniker
The moniker for a USB transport is either:
* `usb:<index>`
* `usb:<vendor>:<product>`
* `usb:<vendor>:<product>/<serial-number>`
@@ -16,6 +17,10 @@ In the `usb:<vendor>:<product>#<index>` form, matching devices are the ones with
`<vendor>` and `<product>` are a vendor ID and product ID in hexadecimal.
In addition, if the moniker ends with the symbol "!", the device will be used in "forced" mode:
the first USB interface of the device will be used, regardless of the interface class/subclass.
This may be useful for some devices that use a custom class/subclass but may nonetheless work as-is.
!!! examples
`usb:04b4:f901`
The USB dongle with `<vendor>` equal to `04b4` and `<product>` equal to `f901`
@@ -29,6 +34,10 @@ In the `usb:<vendor>:<product>#<index>` form, matching devices are the ones with
`usb:04b4:f901/#1`
The second USB dongle with `<vendor>` equal to `04b4` and `<product>` equal to `f901`
`usb:0B05:17CB!`
The BT USB dongle vendor=0B05 and product=17CB, in "forced" mode.
## Alternative
The library includes two different implementations of the USB transport, implemented using different python bindings for `libusb`.
Using the transport prefix `pyusb:` instead of `usb:` selects the implementation based on [PyUSB](https://pypi.org/project/pyusb/), using the synchronous API of `libusb`, whereas the default implementation is based on [libusb1](https://pypi.org/project/libusb1/), using the asynchronous API of `libusb`. In order to use the alternative PyUSB-based implementation, you need to ensure that you have installed that python module, as it isn't installed by default as a dependency of Bumble.