Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The controlTransferIn() method of the USBDevice interface returns a Promise that resolves with a USBInTransferResult when a command or status request has been transmitted to (received by) the USB device.
js
controlTransferIn(setup, length)
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.
length
The maximum number of bytes to read from the device. The actual data is in the USBInTransferResult in the resolved Promise.
promise that resolves with a USBInTransferResult.
| Specification |
|---|
| WebUSB API # ref-for-dom-usbdevice-controltransferin |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
controlTransferIn |
61 | 79 | No | No | 48 | No | No | 61 | No | 45 | No | 8.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/USBDevice/controlTransferIn