Why USB 2.1?

[beaufortfrancois]

Just a quick question there: why do we require USB 2.1?
Is this a real thing?
If so, is that even considerable to ask arduino folks to update their file? https://github.com/arduino/Arduino/blob/06e9981e6b8f302552280e55ce3adc81b0bcc2ee/hardware/arduino/avr/cores/arduino/USBCore.h#L263

[reillyeon]

USB 2.1 is required so that the host knows that the device exposes a Binary Object Store descriptor, which is where the WebUSB descriptor (and Microsoft OS Descriptor 2.0) reading sequence starts.

[beaufortfrancois]

Thank you @reillyeon.
I've sent a PR at arduino/Arduino#4627

Let's cross our fingers ;)

[beaufortfrancois]

Just got an answer from Arduino folks who told me the patch will be merged in the next core release.
Francois happy!

[reillyeon]

Cleaning up old issues.