Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
Note: This feature is available in Web Workers.
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.
controlTransferOut(setup, data)setupAn object that sets options for. The available options are:
requestTypeMust 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".
recipientSpecifies the target of the transfer on the device, one of "device", "interface", "endpoint", or "other".
requestA vendor-specific command.
valueVendor-specific request parameters.
indexThe interface number of the recipient.
dataA 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.