The controlTransferOut() method of the USBDevice interface returns a Promise that resolves with a USBOutTransferResult when a command or status operation has been transmitted from the USB device.

setup

An object that sets options for. The available options are:

requestType

Must be one of three values specifying whether the transfer is "standard" (common to all USB devices) "class" (common to an industry-standard class of devices) or "vendor".

recipient

Specifies the target of the transfer on the device, one of "device", "interface", "endpoint", or "other".

request

A vendor-specific command.

value

Vendor-specific request parameters.

index

The interface number of the recipient.

data

A TypedArray containing the data that will be transferred to the device. Not all commands require data; some commands can send data just through the value parameter. Check with your device to see what the specific request requires.

A promise that resolves with a USBOutTransferResult.