I am trying to use USB RFID reader in our website.
by using navigator.usb.getDevices() i am selecting my device.
open() and selectConfiguration(1)
is working. but device.claimInterface(0); is giving me following error.
An attempt to claim a USB device interface has been blocked because it implements a protected interface class.
Chrome prevents certain interfaces from being accessed for security reasons. These interfaces are the following:
audio
HID
mass storage
smart card
video
audio/video
wireless controller
These are detailed in the following Chrome web test: https://cs.chromium.org/chromium/src/third_party/blink/web_tests/usb/protected-interface-classes.html?q=usb+protected+interface&sq=package:chromium&dr=C&l=9
There is a proposal for WebHID in progress, however: https://discourse.wicg.io/t/human-interface-device-hid-api/3070
Related
Hi I am trying to give a website direct on/off control of a usb relay on a chrome os device. In the past I just used some terminal scripts to run on start-up on a ubuntu device but chrome os is giving me a hard time making this work.
Based on the sample Linux code it looks like these devices are using an FTDI USB serial chip and support a very simple set of commands to turn the relays on and off. The FTDI chips are supported by ChromeOS and so you can use the Web Serial API to control the device like this:
let port = navigator.serial.requestPort();
await port.open({ baudRate: 9600 });
let writer = port.writable.getWriter();
writer.write(new Uint8Array([0xff, 0x01, 0x01]); // Turn relay on command.
await writer.close();
await port.close();
This is a very minimal example. You can improve this by passing a filter to requestPort() to select only the USB devices you want. You also don't need to request permission every time. You can call navigator.serial.getPorts() to get a list of ports that your site already has permission to access.
See https://web.dev/serial and https://wicg.github.io/serial for more information about how to use this API.
I am using a BeagleBone Black board (kernel 4.14.108-ti-r104) to create USB gadget using configfs/functionfs. I compose my gadget (using gadgettool) providing details about device configuration (function, vendor id, product id and ton of other params), run my userspace program that writes descriptors and strings to ep0 and connect the device to host. All works fine, I get BIND (when binding device to UDC) and ENABLE (when actually host is connected) events and my device can read from ep2 and write to ep1. Using wireshark I see the communication looks good, device and configuration descriptors as well as strings are exchanged.
The problem starts when I connect the device to another host. Unfortunately I have almost no control over that host, in particular I cannot run wireshark there, I don't even know the OS. The only thing I can do is to plug/unplug device, optionally see a message that device was detected and optionally a restart. What I see on the gadget side is that following BIND and ENABLE events I immediately get SUSPEND event and read on ep2 fails with 108 (ESHUTDOWN). Now the question is how to track the problem down.
I tried usbmon, but it seems it does not listen to traffic when device is in gadget mode. I have also seen https://github.com/torvalds/linux/blob/master/drivers/usb/gadget/udc/trace.h file which seems to define some udc trace points, but I am not really sure how they can be used.
So the final question is simple: how do I get any information about traffic on USB bus having access only to gadget side? I don't need full trace, but al least some information which packets were exchanged would be super useful. Did it fail while exchanging device descriptors, configuration/interface/endpoint descriptors or strings or something totally different?
Small update:
The whole thing is about Android Open Accessory Protocol and I am trying to write a gadget that would connect to this accessory.
I have changed my gadget composition somewhat and now I know the gadget is being identified by host (it displays manufacturer/model) so I suppose the issue is not in device descriptor and strings. I have used two additional flags in descriptors (FUNCTIONFS_ALL_CTRL_RECIP | FUNCTIONFS_CONFIG0_SETUP) and when connecting to my computer I get setup event (request 51 as expected), but when connecting to my accessory I still get SUSPEND/ESHUTDOWN. This time though it looks like the time between ENABLE and SUSPEND is much greater (over 10 seconds) which looks to me as if the host send some message, but this message was not processed by my gadget and then the host timeout out and disabled usb device. Still don't know how to find out if the accessory sent anything to gadget and what it was...
What is the difference between Jackdaw and KillerBee on ZigBee USB Stick, both seem to be sniffing packet, but Jackdaw can act as a network interface, and KillerBee is only used for pentest? As far as I understand it, you can't use either to connect to like a hub or Wireless router, but only to ZigBee based devices, which would be the IoT devices such as sensors or smart socket etc.
Thank you
We are developing small internet connected device that connects via wifi and does some work. It is controlled via mobile app.
For configuration purposes we use wi-fi module that can work in both STA + AP modes simultaneously via two interfaces wlan0 and wlan1. One of the interfaces works in Master mode. Phone connects to the device via wlan1 and sends command for the device to connect to another network and waits for result. Device in turn connects to another wi-fi network using wlan0 and notifies the phone if connection was successful or not.
But there is one issue. Both interfaces (wlan0 and wlan1) must work on the same channel as we have single hardware module. This causes channel of wlan1 to change in order to match of channel for wlan0.
Here comes the problem. When channel changes phone looses connection with the device. Is there a way to change wi-fi channel but keep connection between the device and mobile phone?
Our wi-fi module is rtl8723bu.
Linux 3.4.103.
Wifi daemons: hostapd v0.8.x_rtw_r7475.20130812_beta, wpa_supplicant v2.3.
UPDATE
Here is more clearly description what is going on on device.
Let's assume that the phone already connected to Device wlan1 interface with essid DeviceAp which is on channel 1. We have a Router with essid RouterAp which is on channel 6. Device interface wlan0 is not configured and not running.
(Step1 on image below).
Then the phone sends a request to the device to connect to RouterAp.
(Step2 on image below).
When wlan0 starts connecting to RouterAp it changes working channel. Because WiFi module can work only on one channel. The channel of wlan1 also changes (maybe in hard way). Therefore Phone lost DeviceAp and starts roaming.
(Step3 on image below).
SO the update question is:
Is there a way to tell the Phone (or other device) about network change? Or perhaps increase the likelihood that the phone is connected back to DeviceAP.
This behavior is very similar to the process of setting up Google Chromecast.
Chromecast also has two wireless interfaces and change the channel, but the Phone does not lose connection with it.
Image:
http://postimg.org/image/soh78vd17/
I am trying to build an HID keyboard. I got my STM32 MCU to recognize as a keyboard, but for some reason when I try to send the HID report (8 bytes) using Endpoint 1 in Interrupt mode. The host side doesn't get the data(key pressed) . Do I need to use the standard method Get_Report ?
I have also tried another implementation on a AT90USB1287. It works well but for some odd reason I must set the endpoint to 3 in order to get it working.
i am wondering if the USB HID keyboard protocol only looks at end point 3 when getting data?
The USB HID (keyboard) protocol uses the endpoint you specify in your USB descriptor. Look at the Endpoint address in the Endpoint descriptor.